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denoland-deno/cli/tsc/dts/lib.deno.ns.d.ts

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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
/// <reference no-default-lib="true" />
/// <reference lib="esnext" />
/// <reference lib="deno.net" />
/** Deno provides extra properties on `import.meta`. These are included here
* to ensure that these are still available when using the Deno namespace in
* conjunction with other type libs, like `dom`.
*
* @category Platform
*/
declare interface ImportMeta {
/** A string representation of the fully qualified module URL. When the
* module is loaded locally, the value will be a file URL (e.g.
* `file:///path/module.ts`).
*
* You can also parse the string as a URL to determine more information about
* how the current module was loaded. For example to determine if a module was
* local or not:
*
* ```ts
* const url = new URL(import.meta.url);
* if (url.protocol === "file:") {
* console.log("this module was loaded locally");
* }
* ```
*/
url: string;
/** The absolute path of the current module.
*
* This property is only provided for local modules (ie. using `file://` URLs).
*
* Example:
* ```
* // Unix
* console.log(import.meta.filename); // /home/alice/my_module.ts
*
* // Windows
* console.log(import.meta.filename); // C:\alice\my_module.ts
* ```
*/
filename?: string;
/** The absolute path of the directory containing the current module.
*
* This property is only provided for local modules (ie. using `file://` URLs).
*
* * Example:
* ```
* // Unix
* console.log(import.meta.dirname); // /home/alice/
*
* // Windows
* console.log(import.meta.dirname); // C:\alice\
* ```
*/
dirname?: string;
/** A flag that indicates if the current module is the main module that was
* called when starting the program under Deno.
*
* ```ts
* if (import.meta.main) {
* // this was loaded as the main module, maybe do some bootstrapping
* }
* ```
*/
main: boolean;
/** A function that returns resolved specifier as if it would be imported
* using `import(specifier)`.
*
* ```ts
* console.log(import.meta.resolve("./foo.js"));
* // file:///dev/foo.js
* ```
*/
resolve(specifier: string): string;
}
/** Deno supports [User Timing Level 3](https://w3c.github.io/user-timing)
* which is not widely supported yet in other runtimes.
*
* Check out the
* [Performance API](https://developer.mozilla.org/en-US/docs/Web/API/Performance)
* documentation on MDN for further information about how to use the API.
*
* @category Performance
*/
declare interface Performance {
/** Stores a timestamp with the associated name (a "mark"). */
mark(markName: string, options?: PerformanceMarkOptions): PerformanceMark;
/** Stores the `DOMHighResTimeStamp` duration between two marks along with the
* associated name (a "measure"). */
measure(
measureName: string,
options?: PerformanceMeasureOptions,
): PerformanceMeasure;
}
/**
* Options which are used in conjunction with `performance.mark`. Check out the
* MDN
* [`performance.mark()`](https://developer.mozilla.org/en-US/docs/Web/API/Performance/mark#markoptions)
* documentation for more details.
*
* @category Performance
*/
declare interface PerformanceMarkOptions {
/** Metadata to be included in the mark. */
// deno-lint-ignore no-explicit-any
detail?: any;
/** Timestamp to be used as the mark time. */
startTime?: number;
}
/**
* Options which are used in conjunction with `performance.measure`. Check out the
* MDN
* [`performance.mark()`](https://developer.mozilla.org/en-US/docs/Web/API/Performance/measure#measureoptions)
* documentation for more details.
*
* @category Performance
*/
declare interface PerformanceMeasureOptions {
/** Metadata to be included in the measure. */
// deno-lint-ignore no-explicit-any
detail?: any;
/** Timestamp to be used as the start time or string to be used as start
* mark. */
start?: string | number;
/** Duration between the start and end times. */
duration?: number;
/** Timestamp to be used as the end time or string to be used as end mark. */
end?: string | number;
}
/** The global namespace where Deno specific, non-standard APIs are located. */
declare namespace Deno {
/** A set of error constructors that are raised by Deno APIs.
*
* Can be used to provide more specific handling of failures within code
* which is using Deno APIs. For example, handling attempting to open a file
* which does not exist:
*
* ```ts
* try {
* const file = await Deno.open("./some/file.txt");
* } catch (error) {
* if (error instanceof Deno.errors.NotFound) {
* console.error("the file was not found");
* } else {
* // otherwise re-throw
* throw error;
* }
* }
* ```
*
* @category Errors
*/
export namespace errors {
/**
* Raised when the underlying operating system indicates that the file
* was not found.
*
* @category Errors */
export class NotFound extends Error {}
/**
* Raised when the underlying operating system indicates the current user
* which the Deno process is running under does not have the appropriate
* permissions to a file or resource, or the user _did not_ provide required
* `--allow-*` flag.
*
* @category Errors */
export class PermissionDenied extends Error {}
/**
* Raised when the underlying operating system reports that a connection to
* a resource is refused.
*
* @category Errors */
export class ConnectionRefused extends Error {}
/**
* Raised when the underlying operating system reports that a connection has
* been reset. With network servers, it can be a _normal_ occurrence where a
* client will abort a connection instead of properly shutting it down.
*
* @category Errors */
export class ConnectionReset extends Error {}
/**
* Raised when the underlying operating system reports an `ECONNABORTED`
* error.
*
* @category Errors */
export class ConnectionAborted extends Error {}
/**
* Raised when the underlying operating system reports an `ENOTCONN` error.
*
* @category Errors */
export class NotConnected extends Error {}
/**
* Raised when attempting to open a server listener on an address and port
* that already has a listener.
*
* @category Errors */
export class AddrInUse extends Error {}
/**
* Raised when the underlying operating system reports an `EADDRNOTAVAIL`
* error.
*
* @category Errors */
export class AddrNotAvailable extends Error {}
/**
* Raised when trying to write to a resource and a broken pipe error occurs.
* This can happen when trying to write directly to `stdout` or `stderr`
* and the operating system is unable to pipe the output for a reason
* external to the Deno runtime.
*
* @category Errors */
export class BrokenPipe extends Error {}
/**
* Raised when trying to create a resource, like a file, that already
* exits.
*
* @category Errors */
export class AlreadyExists extends Error {}
/**
* Raised when an operation to returns data that is invalid for the
* operation being performed.
*
* @category Errors */
export class InvalidData extends Error {}
/**
* Raised when the underlying operating system reports that an I/O operation
* has timed out (`ETIMEDOUT`).
*
* @category Errors */
export class TimedOut extends Error {}
/**
* Raised when the underlying operating system reports an `EINTR` error. In
* many cases, this underlying IO error will be handled internally within
* Deno, or result in an @{link BadResource} error instead.
*
* @category Errors */
export class Interrupted extends Error {}
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/**
* Raised when the underlying operating system would need to block to
* complete but an asynchronous (non-blocking) API is used.
*
* @category Errors */
export class WouldBlock extends Error {}
/**
* Raised when expecting to write to a IO buffer resulted in zero bytes
* being written.
*
* @category Errors */
export class WriteZero extends Error {}
/**
* Raised when attempting to read bytes from a resource, but the EOF was
* unexpectedly encountered.
*
* @category Errors */
export class UnexpectedEof extends Error {}
/**
* The underlying IO resource is invalid or closed, and so the operation
* could not be performed.
*
* @category Errors */
export class BadResource extends Error {}
/**
* Raised in situations where when attempting to load a dynamic import,
* too many redirects were encountered.
*
* @category Errors */
export class Http extends Error {}
/**
* Raised when the underlying IO resource is not available because it is
* being awaited on in another block of code.
*
* @category Errors */
export class Busy extends Error {}
/**
* Raised when the underlying Deno API is asked to perform a function that
* is not currently supported.
*
* @category Errors */
export class NotSupported extends Error {}
/**
* Raised when too many symbolic links were encountered when resolving the
* filename.
*
* @category Errors */
export class FilesystemLoop extends Error {}
/**
* Raised when trying to open, create or write to a directory.
*
* @category Errors */
export class IsADirectory extends Error {}
/**
* Raised when performing a socket operation but the remote host is
* not reachable.
*
* @category Errors */
export class NetworkUnreachable extends Error {}
/**
* Raised when trying to perform an operation on a path that is not a
* directory, when directory is required.
*
* @category Errors */
export class NotADirectory extends Error {}
}
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/** The current process ID of this instance of the Deno CLI.
*
* ```ts
* console.log(Deno.pid);
* ```
*
* @category Runtime
*/
export const pid: number;
/**
* The process ID of parent process of this instance of the Deno CLI.
*
* ```ts
* console.log(Deno.ppid);
* ```
*
* @category Runtime
*/
export const ppid: number;
/** @category Runtime */
export interface MemoryUsage {
/** The number of bytes of the current Deno's process resident set size,
* which is the amount of memory occupied in main memory (RAM). */
rss: number;
/** The total size of the heap for V8, in bytes. */
heapTotal: number;
/** The amount of the heap used for V8, in bytes. */
heapUsed: number;
/** Memory, in bytes, associated with JavaScript objects outside of the
* JavaScript isolate. */
external: number;
}
/**
* Returns an object describing the memory usage of the Deno process and the
* V8 subsystem measured in bytes.
*
* @category Runtime
*/
export function memoryUsage(): MemoryUsage;
/**
* Get the `hostname` of the machine the Deno process is running on.
*
* ```ts
* console.log(Deno.hostname());
* ```
*
* Requires `allow-sys` permission.
*
* @tags allow-sys
* @category Runtime
*/
export function hostname(): string;
/**
* Returns an array containing the 1, 5, and 15 minute load averages. The
* load average is a measure of CPU and IO utilization of the last one, five,
* and 15 minute periods expressed as a fractional number. Zero means there
* is no load. On Windows, the three values are always the same and represent
* the current load, not the 1, 5 and 15 minute load averages.
*
* ```ts
* console.log(Deno.loadavg()); // e.g. [ 0.71, 0.44, 0.44 ]
* ```
*
* Requires `allow-sys` permission.
*
* On Windows there is no API available to retrieve this information and this method returns `[ 0, 0, 0 ]`.
*
* @tags allow-sys
* @category Runtime
*/
export function loadavg(): number[];
/**
* The information for a network interface returned from a call to
* {@linkcode Deno.networkInterfaces}.
*
* @category Network
*/
export interface NetworkInterfaceInfo {
/** The network interface name. */
name: string;
/** The IP protocol version. */
family: "IPv4" | "IPv6";
/** The IP address bound to the interface. */
address: string;
/** The netmask applied to the interface. */
netmask: string;
/** The IPv6 scope id or `null`. */
scopeid: number | null;
/** The CIDR range. */
cidr: string;
/** The MAC address. */
mac: string;
}
/**
* Returns an array of the network interface information.
*
* ```ts
* console.log(Deno.networkInterfaces());
* ```
*
* Requires `allow-sys` permission.
*
* @tags allow-sys
* @category Network
*/
export function networkInterfaces(): NetworkInterfaceInfo[];
/**
* Displays the total amount of free and used physical and swap memory in the
* system, as well as the buffers and caches used by the kernel.
*
* This is similar to the `free` command in Linux
*
* ```ts
* console.log(Deno.systemMemoryInfo());
* ```
*
* Requires `allow-sys` permission.
*
* @tags allow-sys
* @category Runtime
*/
export function systemMemoryInfo(): SystemMemoryInfo;
/**
* Information returned from a call to {@linkcode Deno.systemMemoryInfo}.
*
* @category Runtime
*/
export interface SystemMemoryInfo {
/** Total installed memory in bytes. */
total: number;
/** Unused memory in bytes. */
free: number;
/** Estimation of how much memory, in bytes, is available for starting new
* applications, without swapping. Unlike the data provided by the cache or
* free fields, this field takes into account page cache and also that not
* all reclaimable memory will be reclaimed due to items being in use.
*/
available: number;
/** Memory used by kernel buffers. */
buffers: number;
/** Memory used by the page cache and slabs. */
cached: number;
/** Total swap memory. */
swapTotal: number;
/** Unused swap memory. */
swapFree: number;
}
/** Reflects the `NO_COLOR` environment variable at program start.
*
* When the value is `true`, the Deno CLI will attempt to not send color codes
* to `stderr` or `stdout` and other command line programs should also attempt
* to respect this value.
*
* See: https://no-color.org/
*
* @category Runtime
*/
export const noColor: boolean;
/**
* Returns the release version of the Operating System.
*
* ```ts
* console.log(Deno.osRelease());
* ```
*
* Requires `allow-sys` permission.
* Under consideration to possibly move to Deno.build or Deno.versions and if
* it should depend sys-info, which may not be desirable.
*
* @tags allow-sys
* @category Runtime
*/
export function osRelease(): string;
/**
* Returns the Operating System uptime in number of seconds.
*
* ```ts
* console.log(Deno.osUptime());
* ```
*
* Requires `allow-sys` permission.
*
* @tags allow-sys
* @category Runtime
*/
export function osUptime(): number;
/**
* Options which define the permissions within a test or worker context.
*
* `"inherit"` ensures that all permissions of the parent process will be
* applied to the test context. `"none"` ensures the test context has no
* permissions. A `PermissionOptionsObject` provides a more specific
* set of permissions to the test context.
*
* @category Permissions */
export type PermissionOptions =
| "inherit"
| "none"
| PermissionOptionsObject;
/**
* A set of options which can define the permissions within a test or worker
* context at a highly specific level.
*
* @category Permissions */
export interface PermissionOptionsObject {
/** Specifies if the `env` permission should be requested or revoked.
* If set to `"inherit"`, the current `env` permission will be inherited.
* If set to `true`, the global `env` permission will be requested.
* If set to `false`, the global `env` permission will be revoked.
*
* @default {false}
*/
env?: "inherit" | boolean | string[];
/** Specifies if the `sys` permission should be requested or revoked.
* If set to `"inherit"`, the current `sys` permission will be inherited.
* If set to `true`, the global `sys` permission will be requested.
* If set to `false`, the global `sys` permission will be revoked.
*
* @default {false}
*/
sys?: "inherit" | boolean | string[];
/** Specifies if the `hrtime` permission should be requested or revoked.
* If set to `"inherit"`, the current `hrtime` permission will be inherited.
* If set to `true`, the global `hrtime` permission will be requested.
* If set to `false`, the global `hrtime` permission will be revoked.
*
* @default {false}
*/
hrtime?: "inherit" | boolean;
/** Specifies if the `net` permission should be requested or revoked.
* if set to `"inherit"`, the current `net` permission will be inherited.
* if set to `true`, the global `net` permission will be requested.
* if set to `false`, the global `net` permission will be revoked.
* if set to `string[]`, the `net` permission will be requested with the
* specified host strings with the format `"<host>[:<port>]`.
*
* @default {false}
*
* Examples:
*
* ```ts
* import { assertEquals } from "jsr:@std/assert";
*
* Deno.test({
* name: "inherit",
* permissions: {
* net: "inherit",
* },
* async fn() {
* const status = await Deno.permissions.query({ name: "net" })
* assertEquals(status.state, "granted");
* },
* });
* ```
*
* ```ts
* import { assertEquals } from "jsr:@std/assert";
*
* Deno.test({
* name: "true",
* permissions: {
* net: true,
* },
* async fn() {
* const status = await Deno.permissions.query({ name: "net" });
* assertEquals(status.state, "granted");
* },
* });
* ```
*
* ```ts
* import { assertEquals } from "jsr:@std/assert";
*
* Deno.test({
* name: "false",
* permissions: {
* net: false,
* },
* async fn() {
* const status = await Deno.permissions.query({ name: "net" });
* assertEquals(status.state, "denied");
* },
* });
* ```
*
* ```ts
* import { assertEquals } from "jsr:@std/assert";
*
* Deno.test({
* name: "localhost:8080",
* permissions: {
* net: ["localhost:8080"],
* },
* async fn() {
* const status = await Deno.permissions.query({ name: "net", host: "localhost:8080" });
* assertEquals(status.state, "granted");
* },
* });
* ```
*/
net?: "inherit" | boolean | string[];
/** Specifies if the `ffi` permission should be requested or revoked.
* If set to `"inherit"`, the current `ffi` permission will be inherited.
* If set to `true`, the global `ffi` permission will be requested.
* If set to `false`, the global `ffi` permission will be revoked.
*
* @default {false}
*/
ffi?: "inherit" | boolean | Array<string | URL>;
/** Specifies if the `read` permission should be requested or revoked.
* If set to `"inherit"`, the current `read` permission will be inherited.
* If set to `true`, the global `read` permission will be requested.
* If set to `false`, the global `read` permission will be revoked.
* If set to `Array<string | URL>`, the `read` permission will be requested with the
* specified file paths.
*
* @default {false}
*/
read?: "inherit" | boolean | Array<string | URL>;
/** Specifies if the `run` permission should be requested or revoked.
* If set to `"inherit"`, the current `run` permission will be inherited.
* If set to `true`, the global `run` permission will be requested.
* If set to `false`, the global `run` permission will be revoked.
*
* @default {false}
*/
run?: "inherit" | boolean | Array<string | URL>;
/** Specifies if the `write` permission should be requested or revoked.
* If set to `"inherit"`, the current `write` permission will be inherited.
* If set to `true`, the global `write` permission will be requested.
* If set to `false`, the global `write` permission will be revoked.
* If set to `Array<string | URL>`, the `write` permission will be requested with the
* specified file paths.
*
* @default {false}
*/
write?: "inherit" | boolean | Array<string | URL>;
}
/**
* Context that is passed to a testing function, which can be used to either
* gain information about the current test, or register additional test
* steps within the current test.
*
* @category Testing */
export interface TestContext {
/** The current test name. */
name: string;
/** The string URL of the current test. */
origin: string;
/** If the current test is a step of another test, the parent test context
* will be set here. */
parent?: TestContext;
/** Run a sub step of the parent test or step. Returns a promise
* that resolves to a boolean signifying if the step completed successfully.
*
* The returned promise never rejects unless the arguments are invalid.
*
* If the test was ignored the promise returns `false`.
*
* ```ts
* Deno.test({
* name: "a parent test",
* async fn(t) {
* console.log("before the step");
* await t.step({
* name: "step 1",
* fn(t) {
* console.log("current step:", t.name);
* }
* });
* console.log("after the step");
* }
* });
* ```
*/
step(definition: TestStepDefinition): Promise<boolean>;
/** Run a sub step of the parent test or step. Returns a promise
* that resolves to a boolean signifying if the step completed successfully.
*
* The returned promise never rejects unless the arguments are invalid.
*
* If the test was ignored the promise returns `false`.
*
* ```ts
* Deno.test(
* "a parent test",
* async (t) => {
* console.log("before the step");
* await t.step(
* "step 1",
* (t) => {
* console.log("current step:", t.name);
* }
* );
* console.log("after the step");
* }
* );
* ```
*/
step(
name: string,
fn: (t: TestContext) => void | Promise<void>,
): Promise<boolean>;
/** Run a sub step of the parent test or step. Returns a promise
* that resolves to a boolean signifying if the step completed successfully.
*
* The returned promise never rejects unless the arguments are invalid.
*
* If the test was ignored the promise returns `false`.
*
* ```ts
* Deno.test(async function aParentTest(t) {
* console.log("before the step");
* await t.step(function step1(t) {
* console.log("current step:", t.name);
* });
* console.log("after the step");
* });
* ```
*/
step(fn: (t: TestContext) => void | Promise<void>): Promise<boolean>;
}
/** @category Testing */
export interface TestStepDefinition {
/** The test function that will be tested when this step is executed. The
* function can take an argument which will provide information about the
* current step's context. */
fn: (t: TestContext) => void | Promise<void>;
/** The name of the step. */
name: string;
/** If truthy the current test step will be ignored.
*
* This is a quick way to skip over a step, but also can be used for
* conditional logic, like determining if an environment feature is present.
*/
ignore?: boolean;
/** Check that the number of async completed operations after the test step
* is the same as number of dispatched operations. This ensures that the
* code tested does not start async operations which it then does
* not await. This helps in preventing logic errors and memory leaks
* in the application code.
*
* Defaults to the parent test or step's value. */
sanitizeOps?: boolean;
/** Ensure the test step does not "leak" resources - like open files or
* network connections - by ensuring the open resources at the start of the
* step match the open resources at the end of the step.
*
* Defaults to the parent test or step's value. */
sanitizeResources?: boolean;
/** Ensure the test step does not prematurely cause the process to exit,
* for example via a call to {@linkcode Deno.exit}.
*
* Defaults to the parent test or step's value. */
sanitizeExit?: boolean;
}
/** @category Testing */
export interface TestDefinition {
fn: (t: TestContext) => void | Promise<void>;
/** The name of the test. */
name: string;
/** If truthy the current test step will be ignored.
*
* It is a quick way to skip over a step, but also can be used for
* conditional logic, like determining if an environment feature is present.
*/
ignore?: boolean;
/** If at least one test has `only` set to `true`, only run tests that have
* `only` set to `true` and fail the test suite. */
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only?: boolean;
/** Check that the number of async completed operations after the test step
* is the same as number of dispatched operations. This ensures that the
* code tested does not start async operations which it then does
* not await. This helps in preventing logic errors and memory leaks
* in the application code.
*
* @default {true} */
sanitizeOps?: boolean;
/** Ensure the test step does not "leak" resources - like open files or
* network connections - by ensuring the open resources at the start of the
* test match the open resources at the end of the test.
*
* @default {true} */
sanitizeResources?: boolean;
/** Ensure the test case does not prematurely cause the process to exit,
* for example via a call to {@linkcode Deno.exit}.
*
* @default {true} */
sanitizeExit?: boolean;
/** Specifies the permissions that should be used to run the test.
*
* Set this to "inherit" to keep the calling runtime permissions, set this
* to "none" to revoke all permissions, or set a more specific set of
* permissions using a {@linkcode PermissionOptionsObject}.
*
* @default {"inherit"} */
permissions?: PermissionOptions;
}
/** Register a test which will be run when `deno test` is used on the command
* line and the containing module looks like a test module.
*
* `fn` can be async if required.
*
* ```ts
* import { assertEquals } from "jsr:@std/assert";
*
* Deno.test({
* name: "example test",
* fn() {
* assertEquals("world", "world");
* },
* });
*
* Deno.test({
* name: "example ignored test",
* ignore: Deno.build.os === "windows",
* fn() {
* // This test is ignored only on Windows machines
* },
* });
*
* Deno.test({
* name: "example async test",
* async fn() {
* const decoder = new TextDecoder("utf-8");
* const data = await Deno.readFile("hello_world.txt");
* assertEquals(decoder.decode(data), "Hello world");
* }
* });
* ```
*
* @category Testing
*/
export const test: DenoTest;
/**
* @category Testing
*/
export interface DenoTest {
/** Register a test which will be run when `deno test` is used on the command
* line and the containing module looks like a test module.
*
* `fn` can be async if required.
*
* ```ts
* import { assertEquals } from "jsr:@std/assert";
*
* Deno.test({
* name: "example test",
* fn() {
* assertEquals("world", "world");
* },
* });
*
* Deno.test({
* name: "example ignored test",
* ignore: Deno.build.os === "windows",
* fn() {
* // This test is ignored only on Windows machines
* },
* });
*
* Deno.test({
* name: "example async test",
* async fn() {
* const decoder = new TextDecoder("utf-8");
* const data = await Deno.readFile("hello_world.txt");
* assertEquals(decoder.decode(data), "Hello world");
* }
* });
* ```
*
* @category Testing
*/
(t: TestDefinition): void;
/** Register a test which will be run when `deno test` is used on the command
* line and the containing module looks like a test module.
*
* `fn` can be async if required.
*
* ```ts
* import { assertEquals } from "jsr:@std/assert";
*
* Deno.test("My test description", () => {
* assertEquals("hello", "hello");
* });
*
* Deno.test("My async test description", async () => {
* const decoder = new TextDecoder("utf-8");
* const data = await Deno.readFile("hello_world.txt");
* assertEquals(decoder.decode(data), "Hello world");
* });
* ```
*
* @category Testing
*/
(
name: string,
fn: (t: TestContext) => void | Promise<void>,
): void;
/** Register a test which will be run when `deno test` is used on the command
* line and the containing module looks like a test module.
*
* `fn` can be async if required. Declared function must have a name.
*
* ```ts
* import { assertEquals } from "jsr:@std/assert";
*
* Deno.test(function myTestName() {
* assertEquals("hello", "hello");
* });
*
* Deno.test(async function myOtherTestName() {
* const decoder = new TextDecoder("utf-8");
* const data = await Deno.readFile("hello_world.txt");
* assertEquals(decoder.decode(data), "Hello world");
* });
* ```
*
* @category Testing
*/
(fn: (t: TestContext) => void | Promise<void>): void;
/** Register a test which will be run when `deno test` is used on the command
* line and the containing module looks like a test module.
*
* `fn` can be async if required.
*
* ```ts
* import { assert, fail, assertEquals } from "jsr:@std/assert";
*
* Deno.test("My test description", { permissions: { read: true } }, (): void => {
* assertEquals("hello", "hello");
* });
*
* Deno.test("My async test description", { permissions: { read: false } }, async (): Promise<void> => {
* const decoder = new TextDecoder("utf-8");
* const data = await Deno.readFile("hello_world.txt");
* assertEquals(decoder.decode(data), "Hello world");
* });
* ```
*
* @category Testing
*/
(
name: string,
options: Omit<TestDefinition, "fn" | "name">,
fn: (t: TestContext) => void | Promise<void>,
): void;
/** Register a test which will be run when `deno test` is used on the command
* line and the containing module looks like a test module.
*
* `fn` can be async if required.
*
* ```ts
* import { assertEquals } from "jsr:@std/assert";
*
* Deno.test(
* {
* name: "My test description",
* permissions: { read: true },
* },
* () => {
* assertEquals("hello", "hello");
* },
* );
*
* Deno.test(
* {
* name: "My async test description",
* permissions: { read: false },
* },
* async () => {
* const decoder = new TextDecoder("utf-8");
* const data = await Deno.readFile("hello_world.txt");
* assertEquals(decoder.decode(data), "Hello world");
* },
* );
* ```
*
* @category Testing
*/
(
options: Omit<TestDefinition, "fn" | "name">,
fn: (t: TestContext) => void | Promise<void>,
): void;
/** Register a test which will be run when `deno test` is used on the command
* line and the containing module looks like a test module.
*
* `fn` can be async if required. Declared function must have a name.
*
* ```ts
* import { assertEquals } from "jsr:@std/assert";
*
* Deno.test(
* { permissions: { read: true } },
* function myTestName() {
* assertEquals("hello", "hello");
* },
* );
*
* Deno.test(
* { permissions: { read: false } },
* async function myOtherTestName() {
* const decoder = new TextDecoder("utf-8");
* const data = await Deno.readFile("hello_world.txt");
* assertEquals(decoder.decode(data), "Hello world");
* },
* );
* ```
*
* @category Testing
*/
(
options: Omit<TestDefinition, "fn">,
fn: (t: TestContext) => void | Promise<void>,
): void;
/** Shorthand property for ignoring a particular test case.
*
* @category Testing
*/
ignore(t: Omit<TestDefinition, "ignore">): void;
/** Shorthand property for ignoring a particular test case.
*
* @category Testing
*/
ignore(
name: string,
fn: (t: TestContext) => void | Promise<void>,
): void;
/** Shorthand property for ignoring a particular test case.
*
* @category Testing
*/
ignore(fn: (t: TestContext) => void | Promise<void>): void;
/** Shorthand property for ignoring a particular test case.
*
* @category Testing
*/
ignore(
name: string,
options: Omit<TestDefinition, "fn" | "name" | "ignore">,
fn: (t: TestContext) => void | Promise<void>,
): void;
/** Shorthand property for ignoring a particular test case.
*
* @category Testing
*/
ignore(
options: Omit<TestDefinition, "fn" | "name" | "ignore">,
fn: (t: TestContext) => void | Promise<void>,
): void;
/** Shorthand property for ignoring a particular test case.
*
* @category Testing
*/
ignore(
options: Omit<TestDefinition, "fn" | "ignore">,
fn: (t: TestContext) => void | Promise<void>,
): void;
/** Shorthand property for focusing a particular test case.
*
* @category Testing
*/
only(t: Omit<TestDefinition, "only">): void;
/** Shorthand property for focusing a particular test case.
*
* @category Testing
*/
only(
name: string,
fn: (t: TestContext) => void | Promise<void>,
): void;
/** Shorthand property for focusing a particular test case.
*
* @category Testing
*/
only(fn: (t: TestContext) => void | Promise<void>): void;
/** Shorthand property for focusing a particular test case.
*
* @category Testing
*/
only(
name: string,
options: Omit<TestDefinition, "fn" | "name" | "only">,
fn: (t: TestContext) => void | Promise<void>,
): void;
/** Shorthand property for focusing a particular test case.
*
* @category Testing
*/
only(
options: Omit<TestDefinition, "fn" | "name" | "only">,
fn: (t: TestContext) => void | Promise<void>,
): void;
/** Shorthand property for focusing a particular test case.
*
* @category Testing
*/
only(
options: Omit<TestDefinition, "fn" | "only">,
fn: (t: TestContext) => void | Promise<void>,
): void;
}
/**
* Context that is passed to a benchmarked function. The instance is shared
* between iterations of the benchmark. Its methods can be used for example
* to override of the measured portion of the function.
*
* @category Testing
*/
export interface BenchContext {
/** The current benchmark name. */
name: string;
/** The string URL of the current benchmark. */
origin: string;
/** Restarts the timer for the bench measurement. This should be called
* after doing setup work which should not be measured.
*
fix(bench): explicit timers don't force high precision measurements (#20272) Disables `BenchContext::start()` and `BenchContext::end()` for low precision benchmarks (less than 0.01s per iteration). Prints a warning when they are used in such benchmarks, suggesting to remove them. ```ts Deno.bench("noop", { group: "noops" }, () => {}); Deno.bench("noop with start/end", { group: "noops" }, (b) => { b.start(); b.end(); }); ``` Before: ``` cpu: 12th Gen Intel(R) Core(TM) i9-12900K runtime: deno 1.36.2 (x86_64-unknown-linux-gnu) file:///home/nayeem/projects/deno/temp3.ts benchmark time (avg) iter/s (min … max) p75 p99 p995 ----------------------------------------------------------------------------- ----------------------------- noop 2.63 ns/iter 380,674,131.4 (2.45 ns … 27.78 ns) 2.55 ns 4.03 ns 5.33 ns noop with start and end 302.47 ns/iter 3,306,146.0 (200 ns … 151.2 µs) 300 ns 400 ns 400 ns summary noop 115.14x faster than noop with start and end ``` After: ``` cpu: 12th Gen Intel(R) Core(TM) i9-12900K runtime: deno 1.36.1 (x86_64-unknown-linux-gnu) file:///home/nayeem/projects/deno/temp3.ts benchmark time (avg) iter/s (min … max) p75 p99 p995 ----------------------------------------------------------------------------- ----------------------------- noop 3.01 ns/iter 332,565,561.7 (2.73 ns … 29.54 ns) 2.93 ns 5.29 ns 7.45 ns noop with start and end 7.73 ns/iter 129,291,091.5 (6.61 ns … 46.76 ns) 7.87 ns 13.12 ns 15.32 ns Warning start() and end() calls in "noop with start and end" are ignored because it averages less than 0.01s per iteration. Remove them for better results. summary noop 2.57x faster than noop with start and end ```
2023-08-26 05:29:45 -04:00
* Warning: This method should not be used for benchmarks averaging less
* than 10μs per iteration. In such cases it will be disabled but the call
fix(bench): explicit timers don't force high precision measurements (#20272) Disables `BenchContext::start()` and `BenchContext::end()` for low precision benchmarks (less than 0.01s per iteration). Prints a warning when they are used in such benchmarks, suggesting to remove them. ```ts Deno.bench("noop", { group: "noops" }, () => {}); Deno.bench("noop with start/end", { group: "noops" }, (b) => { b.start(); b.end(); }); ``` Before: ``` cpu: 12th Gen Intel(R) Core(TM) i9-12900K runtime: deno 1.36.2 (x86_64-unknown-linux-gnu) file:///home/nayeem/projects/deno/temp3.ts benchmark time (avg) iter/s (min … max) p75 p99 p995 ----------------------------------------------------------------------------- ----------------------------- noop 2.63 ns/iter 380,674,131.4 (2.45 ns … 27.78 ns) 2.55 ns 4.03 ns 5.33 ns noop with start and end 302.47 ns/iter 3,306,146.0 (200 ns … 151.2 µs) 300 ns 400 ns 400 ns summary noop 115.14x faster than noop with start and end ``` After: ``` cpu: 12th Gen Intel(R) Core(TM) i9-12900K runtime: deno 1.36.1 (x86_64-unknown-linux-gnu) file:///home/nayeem/projects/deno/temp3.ts benchmark time (avg) iter/s (min … max) p75 p99 p995 ----------------------------------------------------------------------------- ----------------------------- noop 3.01 ns/iter 332,565,561.7 (2.73 ns … 29.54 ns) 2.93 ns 5.29 ns 7.45 ns noop with start and end 7.73 ns/iter 129,291,091.5 (6.61 ns … 46.76 ns) 7.87 ns 13.12 ns 15.32 ns Warning start() and end() calls in "noop with start and end" are ignored because it averages less than 0.01s per iteration. Remove them for better results. summary noop 2.57x faster than noop with start and end ```
2023-08-26 05:29:45 -04:00
* will still have noticeable overhead, resulting in a warning.
*
* ```ts
* Deno.bench("foo", async (t) => {
* const data = await Deno.readFile("data.txt");
* t.start();
* // some operation on `data`...
* });
* ```
*/
start(): void;
/** End the timer early for the bench measurement. This should be called
* before doing teardown work which should not be measured.
*
fix(bench): explicit timers don't force high precision measurements (#20272) Disables `BenchContext::start()` and `BenchContext::end()` for low precision benchmarks (less than 0.01s per iteration). Prints a warning when they are used in such benchmarks, suggesting to remove them. ```ts Deno.bench("noop", { group: "noops" }, () => {}); Deno.bench("noop with start/end", { group: "noops" }, (b) => { b.start(); b.end(); }); ``` Before: ``` cpu: 12th Gen Intel(R) Core(TM) i9-12900K runtime: deno 1.36.2 (x86_64-unknown-linux-gnu) file:///home/nayeem/projects/deno/temp3.ts benchmark time (avg) iter/s (min … max) p75 p99 p995 ----------------------------------------------------------------------------- ----------------------------- noop 2.63 ns/iter 380,674,131.4 (2.45 ns … 27.78 ns) 2.55 ns 4.03 ns 5.33 ns noop with start and end 302.47 ns/iter 3,306,146.0 (200 ns … 151.2 µs) 300 ns 400 ns 400 ns summary noop 115.14x faster than noop with start and end ``` After: ``` cpu: 12th Gen Intel(R) Core(TM) i9-12900K runtime: deno 1.36.1 (x86_64-unknown-linux-gnu) file:///home/nayeem/projects/deno/temp3.ts benchmark time (avg) iter/s (min … max) p75 p99 p995 ----------------------------------------------------------------------------- ----------------------------- noop 3.01 ns/iter 332,565,561.7 (2.73 ns … 29.54 ns) 2.93 ns 5.29 ns 7.45 ns noop with start and end 7.73 ns/iter 129,291,091.5 (6.61 ns … 46.76 ns) 7.87 ns 13.12 ns 15.32 ns Warning start() and end() calls in "noop with start and end" are ignored because it averages less than 0.01s per iteration. Remove them for better results. summary noop 2.57x faster than noop with start and end ```
2023-08-26 05:29:45 -04:00
* Warning: This method should not be used for benchmarks averaging less
* than 10μs per iteration. In such cases it will be disabled but the call
fix(bench): explicit timers don't force high precision measurements (#20272) Disables `BenchContext::start()` and `BenchContext::end()` for low precision benchmarks (less than 0.01s per iteration). Prints a warning when they are used in such benchmarks, suggesting to remove them. ```ts Deno.bench("noop", { group: "noops" }, () => {}); Deno.bench("noop with start/end", { group: "noops" }, (b) => { b.start(); b.end(); }); ``` Before: ``` cpu: 12th Gen Intel(R) Core(TM) i9-12900K runtime: deno 1.36.2 (x86_64-unknown-linux-gnu) file:///home/nayeem/projects/deno/temp3.ts benchmark time (avg) iter/s (min … max) p75 p99 p995 ----------------------------------------------------------------------------- ----------------------------- noop 2.63 ns/iter 380,674,131.4 (2.45 ns … 27.78 ns) 2.55 ns 4.03 ns 5.33 ns noop with start and end 302.47 ns/iter 3,306,146.0 (200 ns … 151.2 µs) 300 ns 400 ns 400 ns summary noop 115.14x faster than noop with start and end ``` After: ``` cpu: 12th Gen Intel(R) Core(TM) i9-12900K runtime: deno 1.36.1 (x86_64-unknown-linux-gnu) file:///home/nayeem/projects/deno/temp3.ts benchmark time (avg) iter/s (min … max) p75 p99 p995 ----------------------------------------------------------------------------- ----------------------------- noop 3.01 ns/iter 332,565,561.7 (2.73 ns … 29.54 ns) 2.93 ns 5.29 ns 7.45 ns noop with start and end 7.73 ns/iter 129,291,091.5 (6.61 ns … 46.76 ns) 7.87 ns 13.12 ns 15.32 ns Warning start() and end() calls in "noop with start and end" are ignored because it averages less than 0.01s per iteration. Remove them for better results. summary noop 2.57x faster than noop with start and end ```
2023-08-26 05:29:45 -04:00
* will still have noticeable overhead, resulting in a warning.
*
* ```ts
* Deno.bench("foo", async (t) => {
* using file = await Deno.open("data.txt");
* t.start();
* // some operation on `file`...
* t.end();
* });
* ```
*/
end(): void;
}
/**
* The interface for defining a benchmark test using {@linkcode Deno.bench}.
*
* @category Testing
*/
export interface BenchDefinition {
/** The test function which will be benchmarked. */
fn: (b: BenchContext) => void | Promise<void>;
/** The name of the test, which will be used in displaying the results. */
name: string;
/** If truthy, the benchmark test will be ignored/skipped. */
ignore?: boolean;
/** Group name for the benchmark.
*
* Grouped benchmarks produce a group time summary, where the difference
* in performance between each test of the group is compared. */
group?: string;
/** Benchmark should be used as the baseline for other benchmarks.
*
* If there are multiple baselines in a group, the first one is used as the
* baseline. */
baseline?: boolean;
/** If at least one bench has `only` set to true, only run benches that have
* `only` set to `true` and fail the bench suite. */
only?: boolean;
/** Ensure the bench case does not prematurely cause the process to exit,
* for example via a call to {@linkcode Deno.exit}.
*
* @default {true} */
sanitizeExit?: boolean;
/** Specifies the permissions that should be used to run the bench.
*
* Set this to `"inherit"` to keep the calling thread's permissions.
*
* Set this to `"none"` to revoke all permissions.
*
* @default {"inherit"}
*/
permissions?: PermissionOptions;
}
/**
* Register a benchmark test which will be run when `deno bench` is used on
* the command line and the containing module looks like a bench module.
*
* If the test function (`fn`) returns a promise or is async, the test runner
* will await resolution to consider the test complete.
*
* ```ts
* import { assertEquals } from "jsr:@std/assert";
*
* Deno.bench({
* name: "example test",
* fn() {
* assertEquals("world", "world");
* },
* });
*
* Deno.bench({
* name: "example ignored test",
* ignore: Deno.build.os === "windows",
* fn() {
* // This test is ignored only on Windows machines
* },
* });
*
* Deno.bench({
* name: "example async test",
* async fn() {
* const decoder = new TextDecoder("utf-8");
* const data = await Deno.readFile("hello_world.txt");
* assertEquals(decoder.decode(data), "Hello world");
* }
* });
* ```
*
* @category Testing
*/
export function bench(b: BenchDefinition): void;
/**
* Register a benchmark test which will be run when `deno bench` is used on
* the command line and the containing module looks like a bench module.
*
* If the test function (`fn`) returns a promise or is async, the test runner
* will await resolution to consider the test complete.
*
* ```ts
* import { assertEquals } from "jsr:@std/assert";
*
* Deno.bench("My test description", () => {
* assertEquals("hello", "hello");
* });
*
* Deno.bench("My async test description", async () => {
* const decoder = new TextDecoder("utf-8");
* const data = await Deno.readFile("hello_world.txt");
* assertEquals(decoder.decode(data), "Hello world");
* });
* ```
*
* @category Testing
*/
export function bench(
name: string,
fn: (b: BenchContext) => void | Promise<void>,
): void;
/**
* Register a benchmark test which will be run when `deno bench` is used on
* the command line and the containing module looks like a bench module.
*
* If the test function (`fn`) returns a promise or is async, the test runner
* will await resolution to consider the test complete.
*
* ```ts
* import { assertEquals } from "jsr:@std/assert";
*
* Deno.bench(function myTestName() {
* assertEquals("hello", "hello");
* });
*
* Deno.bench(async function myOtherTestName() {
* const decoder = new TextDecoder("utf-8");
* const data = await Deno.readFile("hello_world.txt");
* assertEquals(decoder.decode(data), "Hello world");
* });
* ```
*
* @category Testing
*/
export function bench(fn: (b: BenchContext) => void | Promise<void>): void;
/**
* Register a benchmark test which will be run when `deno bench` is used on
* the command line and the containing module looks like a bench module.
*
* If the test function (`fn`) returns a promise or is async, the test runner
* will await resolution to consider the test complete.
*
* ```ts
* import { assertEquals } from "jsr:@std/assert";
*
* Deno.bench(
* "My test description",
* { permissions: { read: true } },
* () => {
* assertEquals("hello", "hello");
* }
* );
*
* Deno.bench(
* "My async test description",
* { permissions: { read: false } },
* async () => {
* const decoder = new TextDecoder("utf-8");
* const data = await Deno.readFile("hello_world.txt");
* assertEquals(decoder.decode(data), "Hello world");
* }
* );
* ```
*
* @category Testing
*/
export function bench(
name: string,
options: Omit<BenchDefinition, "fn" | "name">,
fn: (b: BenchContext) => void | Promise<void>,
): void;
/**
* Register a benchmark test which will be run when `deno bench` is used on
* the command line and the containing module looks like a bench module.
*
* If the test function (`fn`) returns a promise or is async, the test runner
* will await resolution to consider the test complete.
*
* ```ts
* import { assertEquals } from "jsr:@std/assert";
*
* Deno.bench(
* { name: "My test description", permissions: { read: true } },
* () => {
* assertEquals("hello", "hello");
* }
* );
*
* Deno.bench(
* { name: "My async test description", permissions: { read: false } },
* async () => {
* const decoder = new TextDecoder("utf-8");
* const data = await Deno.readFile("hello_world.txt");
* assertEquals(decoder.decode(data), "Hello world");
* }
* );
* ```
*
* @category Testing
*/
export function bench(
options: Omit<BenchDefinition, "fn">,
fn: (b: BenchContext) => void | Promise<void>,
): void;
/**
* Register a benchmark test which will be run when `deno bench` is used on
* the command line and the containing module looks like a bench module.
*
* If the test function (`fn`) returns a promise or is async, the test runner
* will await resolution to consider the test complete.
*
* ```ts
* import { assertEquals } from "jsr:@std/assert";
*
* Deno.bench(
* { permissions: { read: true } },
* function myTestName() {
* assertEquals("hello", "hello");
* }
* );
*
* Deno.bench(
* { permissions: { read: false } },
* async function myOtherTestName() {
* const decoder = new TextDecoder("utf-8");
* const data = await Deno.readFile("hello_world.txt");
* assertEquals(decoder.decode(data), "Hello world");
* }
* );
* ```
*
* @category Testing
*/
export function bench(
options: Omit<BenchDefinition, "fn" | "name">,
fn: (b: BenchContext) => void | Promise<void>,
): void;
/** Exit the Deno process with optional exit code.
*
* If no exit code is supplied then Deno will exit with return code of `0`.
*
* In worker contexts this is an alias to `self.close();`.
*
* ```ts
* Deno.exit(5);
* ```
*
* @category Runtime
*/
export function exit(code?: number): never;
/** An interface containing methods to interact with the process environment
* variables.
*
* @tags allow-env
* @category Runtime
*/
export interface Env {
/** Retrieve the value of an environment variable.
*
* Returns `undefined` if the supplied environment variable is not defined.
*
* ```ts
* console.log(Deno.env.get("HOME")); // e.g. outputs "/home/alice"
* console.log(Deno.env.get("MADE_UP_VAR")); // outputs "undefined"
* ```
*
* Requires `allow-env` permission.
*
* @tags allow-env
*/
get(key: string): string | undefined;
/** Set the value of an environment variable.
*
* ```ts
* Deno.env.set("SOME_VAR", "Value");
* Deno.env.get("SOME_VAR"); // outputs "Value"
* ```
*
* Requires `allow-env` permission.
*
* @tags allow-env
*/
set(key: string, value: string): void;
/** Delete the value of an environment variable.
*
* ```ts
* Deno.env.set("SOME_VAR", "Value");
* Deno.env.delete("SOME_VAR"); // outputs "undefined"
* ```
*
* Requires `allow-env` permission.
*
* @tags allow-env
*/
delete(key: string): void;
/** Check whether an environment variable is present or not.
*
* ```ts
* Deno.env.set("SOME_VAR", "Value");
* Deno.env.has("SOME_VAR"); // outputs true
* ```
*
* Requires `allow-env` permission.
*
* @tags allow-env
*/
has(key: string): boolean;
/** Returns a snapshot of the environment variables at invocation as a
* simple object of keys and values.
*
* ```ts
* Deno.env.set("TEST_VAR", "A");
* const myEnv = Deno.env.toObject();
* console.log(myEnv.SHELL);
* Deno.env.set("TEST_VAR", "B");
* console.log(myEnv.TEST_VAR); // outputs "A"
* ```
*
* Requires `allow-env` permission.
*
* @tags allow-env
*/
toObject(): { [index: string]: string };
}
/** An interface containing methods to interact with the process environment
* variables.
*
* @tags allow-env
* @category Runtime
*/
export const env: Env;
/**
* Returns the path to the current deno executable.
*
* ```ts
* console.log(Deno.execPath()); // e.g. "/home/alice/.local/bin/deno"
* ```
*
* Requires `allow-read` permission.
*
* @tags allow-read
* @category Runtime
*/
export function execPath(): string;
/**
* Change the current working directory to the specified path.
*
* ```ts
* Deno.chdir("/home/userA");
* Deno.chdir("../userB");
* Deno.chdir("C:\\Program Files (x86)\\Java");
* ```
*
* Throws {@linkcode Deno.errors.NotFound} if directory not found.
*
* Throws {@linkcode Deno.errors.PermissionDenied} if the user does not have
* operating system file access rights.
*
* Requires `allow-read` permission.
*
* @tags allow-read
* @category Runtime
*/
export function chdir(directory: string | URL): void;
/**
* Return a string representing the current working directory.
*
* If the current directory can be reached via multiple paths (due to symbolic
* links), `cwd()` may return any one of them.
*
* ```ts
* const currentWorkingDirectory = Deno.cwd();
* ```
*
* Throws {@linkcode Deno.errors.NotFound} if directory not available.
*
* Requires `allow-read` permission.
*
* @tags allow-read
* @category Runtime
*/
export function cwd(): string;
/**
* Creates `newpath` as a hard link to `oldpath`.
*
* ```ts
* await Deno.link("old/name", "new/name");
* ```
*
* Requires `allow-read` and `allow-write` permissions.
*
* @tags allow-read, allow-write
* @category File System
*/
export function link(oldpath: string, newpath: string): Promise<void>;
/**
* Synchronously creates `newpath` as a hard link to `oldpath`.
*
* ```ts
* Deno.linkSync("old/name", "new/name");
* ```
*
* Requires `allow-read` and `allow-write` permissions.
*
* @tags allow-read, allow-write
* @category File System
*/
export function linkSync(oldpath: string, newpath: string): void;
/**
* A enum which defines the seek mode for IO related APIs that support
* seeking.
*
* @category I/O */
export enum SeekMode {
/* Seek from the start of the file/resource. */
Start = 0,
/* Seek from the current position within the file/resource. */
Current = 1,
/* Seek from the end of the current file/resource. */
End = 2,
}
/**
* An abstract interface which when implemented provides an interface to read
* bytes into an array buffer asynchronously.
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O */
export interface Reader {
/** Reads up to `p.byteLength` bytes into `p`. It resolves to the number of
* bytes read (`0` < `n` <= `p.byteLength`) and rejects if any error
* encountered. Even if `read()` resolves to `n` < `p.byteLength`, it may
* use all of `p` as scratch space during the call. If some data is
* available but not `p.byteLength` bytes, `read()` conventionally resolves
* to what is available instead of waiting for more.
*
* When `read()` encounters end-of-file condition, it resolves to EOF
* (`null`).
*
* When `read()` encounters an error, it rejects with an error.
*
* Callers should always process the `n` > `0` bytes returned before
* considering the EOF (`null`). Doing so correctly handles I/O errors that
* happen after reading some bytes and also both of the allowed EOF
* behaviors.
*
* Implementations should not retain a reference to `p`.
*
* Use
* {@linkcode https://jsr.io/@std/io/doc/iterate-reader/~/iterateReader | iterateReader}
* to turn {@linkcode Reader} into an {@linkcode AsyncIterator}.
*/
read(p: Uint8Array): Promise<number | null>;
}
/**
* An abstract interface which when implemented provides an interface to read
* bytes into an array buffer synchronously.
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O */
export interface ReaderSync {
/** Reads up to `p.byteLength` bytes into `p`. It resolves to the number
* of bytes read (`0` < `n` <= `p.byteLength`) and rejects if any error
* encountered. Even if `readSync()` returns `n` < `p.byteLength`, it may use
* all of `p` as scratch space during the call. If some data is available
* but not `p.byteLength` bytes, `readSync()` conventionally returns what is
* available instead of waiting for more.
*
* When `readSync()` encounters end-of-file condition, it returns EOF
* (`null`).
*
* When `readSync()` encounters an error, it throws with an error.
*
* Callers should always process the `n` > `0` bytes returned before
* considering the EOF (`null`). Doing so correctly handles I/O errors that
* happen after reading some bytes and also both of the allowed EOF
* behaviors.
*
* Implementations should not retain a reference to `p`.
*
* Use
* {@linkcode https://jsr.io/@std/io/doc/iterate-reader/~/iterateReaderSync | iterateReaderSync}
* to turn {@linkcode ReaderSync} into an {@linkcode Iterator}.
*/
readSync(p: Uint8Array): number | null;
}
/**
* An abstract interface which when implemented provides an interface to write
* bytes from an array buffer to a file/resource asynchronously.
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O */
export interface Writer {
/** Writes `p.byteLength` bytes from `p` to the underlying data stream. It
* resolves to the number of bytes written from `p` (`0` <= `n` <=
* `p.byteLength`) or reject with the error encountered that caused the
* write to stop early. `write()` must reject with a non-null error if
* would resolve to `n` < `p.byteLength`. `write()` must not modify the
* slice data, even temporarily.
*
* This function is one of the lowest
* level APIs and most users should not work with this directly, but rather
* use {@linkcode https://jsr.io/@std/io/doc/write-all/~/writeAll | writeAll}
* instead.
*
* Implementations should not retain a reference to `p`.
*/
write(p: Uint8Array): Promise<number>;
}
/**
* An abstract interface which when implemented provides an interface to write
* bytes from an array buffer to a file/resource synchronously.
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O */
export interface WriterSync {
/** Writes `p.byteLength` bytes from `p` to the underlying data
* stream. It returns the number of bytes written from `p` (`0` <= `n`
* <= `p.byteLength`) and any error encountered that caused the write to
* stop early. `writeSync()` must throw a non-null error if it returns `n` <
* `p.byteLength`. `writeSync()` must not modify the slice data, even
* temporarily.
*
* Implementations should not retain a reference to `p`.
*/
writeSync(p: Uint8Array): number;
}
/**
* An abstract interface which when implemented provides an interface to close
* files/resources that were previously opened.
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O */
export interface Closer {
/** Closes the resource, "freeing" the backing file/resource. */
close(): void;
}
/**
* An abstract interface which when implemented provides an interface to seek
* within an open file/resource asynchronously.
*
* @category I/O */
export interface Seeker {
/** Seek sets the offset for the next `read()` or `write()` to offset,
* interpreted according to `whence`: `Start` means relative to the
* start of the file, `Current` means relative to the current offset,
* and `End` means relative to the end. Seek resolves to the new offset
* relative to the start of the file.
*
* Seeking to an offset before the start of the file is an error. Seeking to
* any positive offset is legal, but the behavior of subsequent I/O
* operations on the underlying object is implementation-dependent.
*
* It resolves with the updated offset.
*/
seek(offset: number | bigint, whence: SeekMode): Promise<number>;
}
/**
* An abstract interface which when implemented provides an interface to seek
* within an open file/resource synchronously.
*
* @category I/O */
export interface SeekerSync {
/** Seek sets the offset for the next `readSync()` or `writeSync()` to
* offset, interpreted according to `whence`: `Start` means relative
* to the start of the file, `Current` means relative to the current
* offset, and `End` means relative to the end.
*
* Seeking to an offset before the start of the file is an error. Seeking to
* any positive offset is legal, but the behavior of subsequent I/O
* operations on the underlying object is implementation-dependent.
*
* It returns the updated offset.
*/
seekSync(offset: number | bigint, whence: SeekMode): number;
}
/**
* Copies from `src` to `dst` until either EOF (`null`) is read from `src` or
* an error occurs. It resolves to the number of bytes copied or rejects with
* the first error encountered while copying.
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O
*
* @param src The source to copy from
* @param dst The destination to copy to
* @param options Can be used to tune size of the buffer. Default size is 32kB
*/
export function copy(
src: Reader,
dst: Writer,
options?: { bufSize?: number },
): Promise<number>;
/**
* Turns a Reader, `r`, into an async iterator.
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O
*/
export function iter(
r: Reader,
options?: { bufSize?: number },
): AsyncIterableIterator<Uint8Array>;
/**
* Turns a ReaderSync, `r`, into an iterator.
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O
*/
export function iterSync(
r: ReaderSync,
options?: {
bufSize?: number;
},
): IterableIterator<Uint8Array>;
/** Open a file and resolve to an instance of {@linkcode Deno.FsFile}. The
2020-03-29 21:39:10 -04:00
* file does not need to previously exist if using the `create` or `createNew`
* open options. The caller may have the resulting file automatically closed
* by the runtime once it's out of scope by declaring the file variable with
* the `using` keyword.
*
* ```ts
* using file = await Deno.open("/foo/bar.txt", { read: true, write: true });
* // Do work with file
* ```
*
* Alternatively, the caller may manually close the resource when finished with
* it.
*
* ```ts
* const file = await Deno.open("/foo/bar.txt", { read: true, write: true });
* // Do work with file
* file.close();
* ```
*
* Requires `allow-read` and/or `allow-write` permissions depending on
* options.
*
* @tags allow-read, allow-write
* @category File System
*/
export function open(
path: string | URL,
options?: OpenOptions,
): Promise<FsFile>;
/** Synchronously open a file and return an instance of
* {@linkcode Deno.FsFile}. The file does not need to previously exist if
* using the `create` or `createNew` open options. The caller may have the
* resulting file automatically closed by the runtime once it's out of scope
* by declaring the file variable with the `using` keyword.
*
* ```ts
* using file = Deno.openSync("/foo/bar.txt", { read: true, write: true });
* // Do work with file
* ```
*
* Alternatively, the caller may manually close the resource when finished with
* it.
*
* ```ts
* const file = Deno.openSync("/foo/bar.txt", { read: true, write: true });
* // Do work with file
* file.close();
* ```
*
* Requires `allow-read` and/or `allow-write` permissions depending on
* options.
*
* @tags allow-read, allow-write
* @category File System
*/
export function openSync(path: string | URL, options?: OpenOptions): FsFile;
/** Creates a file if none exists or truncates an existing file and resolves to
* an instance of {@linkcode Deno.FsFile}.
2020-01-08 17:07:03 -05:00
*
* ```ts
* const file = await Deno.create("/foo/bar.txt");
* ```
*
* Requires `allow-read` and `allow-write` permissions.
*
* @tags allow-read, allow-write
* @category File System
2020-01-08 17:07:03 -05:00
*/
export function create(path: string | URL): Promise<FsFile>;
/** Creates a file if none exists or truncates an existing file and returns
* an instance of {@linkcode Deno.FsFile}.
2020-01-08 17:07:03 -05:00
*
* ```ts
* const file = Deno.createSync("/foo/bar.txt");
* ```
*
* Requires `allow-read` and `allow-write` permissions.
*
* @tags allow-read, allow-write
* @category File System
2020-01-08 17:07:03 -05:00
*/
export function createSync(path: string | URL): FsFile;
/** Read from a resource ID (`rid`) into an array buffer (`buffer`).
*
* Resolves to either the number of bytes read during the operation or EOF
* (`null`) if there was nothing more to read.
*
* It is possible for a read to successfully return with `0` bytes. This does
* not indicate EOF.
*
* This function is one of the lowest level APIs and most users should not
* work with this directly, but rather use {@linkcode ReadableStream} and
* {@linkcode https://jsr.io/@std/streams/doc/to-array-buffer/~/toArrayBuffer | toArrayBuffer}
* instead.
*
* **It is not guaranteed that the full buffer will be read in a single call.**
*
* ```ts
* // if "/foo/bar.txt" contains the text "hello world":
* using file = await Deno.open("/foo/bar.txt");
* const buf = new Uint8Array(100);
* const numberOfBytesRead = await Deno.read(file.rid, buf); // 11 bytes
* const text = new TextDecoder().decode(buf); // "hello world"
* ```
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O
*/
export function read(rid: number, buffer: Uint8Array): Promise<number | null>;
/** Synchronously read from a resource ID (`rid`) into an array buffer
* (`buffer`).
*
* Returns either the number of bytes read during the operation or EOF
* (`null`) if there was nothing more to read.
*
* It is possible for a read to successfully return with `0` bytes. This does
* not indicate EOF.
*
* This function is one of the lowest level APIs and most users should not
* work with this directly, but rather use {@linkcode ReadableStream} and
* {@linkcode https://jsr.io/@std/streams/doc/to-array-buffer/~/toArrayBuffer | toArrayBuffer}
* instead.
*
* **It is not guaranteed that the full buffer will be read in a single
* call.**
*
* ```ts
* // if "/foo/bar.txt" contains the text "hello world":
* using file = Deno.openSync("/foo/bar.txt");
* const buf = new Uint8Array(100);
* const numberOfBytesRead = Deno.readSync(file.rid, buf); // 11 bytes
* const text = new TextDecoder().decode(buf); // "hello world"
* ```
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O
*/
export function readSync(rid: number, buffer: Uint8Array): number | null;
/** Write to the resource ID (`rid`) the contents of the array buffer (`data`).
*
* Resolves to the number of bytes written. This function is one of the lowest
* level APIs and most users should not work with this directly, but rather
* use {@linkcode WritableStream}, {@linkcode ReadableStream.from} and
* {@linkcode ReadableStream.pipeTo}.
*
* **It is not guaranteed that the full buffer will be written in a single
* call.**
*
* ```ts
* const encoder = new TextEncoder();
* const data = encoder.encode("Hello world");
* using file = await Deno.open("/foo/bar.txt", { write: true });
* const bytesWritten = await Deno.write(file.rid, data); // 11
* ```
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O
*/
export function write(rid: number, data: Uint8Array): Promise<number>;
/** Synchronously write to the resource ID (`rid`) the contents of the array
* buffer (`data`).
*
* Returns the number of bytes written. This function is one of the lowest
* level APIs and most users should not work with this directly, but rather
* use {@linkcode WritableStream}, {@linkcode ReadableStream.from} and
* {@linkcode ReadableStream.pipeTo}.
*
* **It is not guaranteed that the full buffer will be written in a single
* call.**
*
* ```ts
* const encoder = new TextEncoder();
* const data = encoder.encode("Hello world");
* using file = Deno.openSync("/foo/bar.txt", { write: true });
* const bytesWritten = Deno.writeSync(file.rid, data); // 11
* ```
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O
*/
export function writeSync(rid: number, data: Uint8Array): number;
/** Seek a resource ID (`rid`) to the given `offset` under mode given by `whence`.
* The call resolves to the new position within the resource (bytes from the start).
*
* ```ts
* // Given file.rid pointing to file with "Hello world", which is 11 bytes long:
* using file = await Deno.open(
* "hello.txt",
* { read: true, write: true, truncate: true, create: true },
* );
* await file.write(new TextEncoder().encode("Hello world"));
*
* // advance cursor 6 bytes
* const cursorPosition = await Deno.seek(file.rid, 6, Deno.SeekMode.Start);
* console.log(cursorPosition); // 6
* const buf = new Uint8Array(100);
* await file.read(buf);
* console.log(new TextDecoder().decode(buf)); // "world"
* ```
*
* The seek modes work as follows:
*
* ```ts
* // Given file.rid pointing to file with "Hello world", which is 11 bytes long:
* using file = await Deno.open(
* "hello.txt",
* { read: true, write: true, truncate: true, create: true },
* );
* await file.write(new TextEncoder().encode("Hello world"));
*
* // Seek 6 bytes from the start of the file
* console.log(await Deno.seek(file.rid, 6, Deno.SeekMode.Start)); // "6"
* // Seek 2 more bytes from the current position
* console.log(await Deno.seek(file.rid, 2, Deno.SeekMode.Current)); // "8"
* // Seek backwards 2 bytes from the end of the file
* console.log(await Deno.seek(file.rid, -2, Deno.SeekMode.End)); // "9" (i.e. 11-2)
* ```
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O
*/
export function seek(
rid: number,
offset: number | bigint,
whence: SeekMode,
): Promise<number>;
/** Synchronously seek a resource ID (`rid`) to the given `offset` under mode
* given by `whence`. The new position within the resource (bytes from the
* start) is returned.
*
* ```ts
* using file = Deno.openSync(
* "hello.txt",
* { read: true, write: true, truncate: true, create: true },
* );
* file.writeSync(new TextEncoder().encode("Hello world"));
*
* // advance cursor 6 bytes
* const cursorPosition = Deno.seekSync(file.rid, 6, Deno.SeekMode.Start);
* console.log(cursorPosition); // 6
* const buf = new Uint8Array(100);
* file.readSync(buf);
* console.log(new TextDecoder().decode(buf)); // "world"
* ```
*
* The seek modes work as follows:
*
* ```ts
* // Given file.rid pointing to file with "Hello world", which is 11 bytes long:
* using file = Deno.openSync(
* "hello.txt",
* { read: true, write: true, truncate: true, create: true },
* );
* file.writeSync(new TextEncoder().encode("Hello world"));
*
* // Seek 6 bytes from the start of the file
* console.log(Deno.seekSync(file.rid, 6, Deno.SeekMode.Start)); // "6"
* // Seek 2 more bytes from the current position
* console.log(Deno.seekSync(file.rid, 2, Deno.SeekMode.Current)); // "8"
* // Seek backwards 2 bytes from the end of the file
* console.log(Deno.seekSync(file.rid, -2, Deno.SeekMode.End)); // "9" (i.e. 11-2)
* ```
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O
*/
export function seekSync(
rid: number,
offset: number | bigint,
whence: SeekMode,
): number;
/**
* Flushes any pending data and metadata operations of the given file stream
* to disk.
*
* ```ts
* const file = await Deno.open(
* "my_file.txt",
* { read: true, write: true, create: true },
* );
* await file.write(new TextEncoder().encode("Hello World"));
* await file.truncate(1);
* await Deno.fsync(file.rid);
* console.log(await Deno.readTextFile("my_file.txt")); // H
* ```
*
* @category File System
*/
export function fsync(rid: number): Promise<void>;
/**
* Synchronously flushes any pending data and metadata operations of the given
* file stream to disk.
*
* ```ts
* const file = Deno.openSync(
* "my_file.txt",
* { read: true, write: true, create: true },
* );
* file.writeSync(new TextEncoder().encode("Hello World"));
* file.truncateSync(1);
* Deno.fsyncSync(file.rid);
* console.log(Deno.readTextFileSync("my_file.txt")); // H
* ```
*
* @category File System
*/
export function fsyncSync(rid: number): void;
/**
* Flushes any pending data operations of the given file stream to disk.
* ```ts
* const file = await Deno.open(
* "my_file.txt",
* { read: true, write: true, create: true },
* );
* await file.write(new TextEncoder().encode("Hello World"));
* await Deno.fdatasync(file.rid);
* console.log(await Deno.readTextFile("my_file.txt")); // Hello World
* ```
*
* @category File System
*/
export function fdatasync(rid: number): Promise<void>;
/**
* Synchronously flushes any pending data operations of the given file stream
* to disk.
*
* ```ts
* const file = Deno.openSync(
* "my_file.txt",
* { read: true, write: true, create: true },
* );
* file.writeSync(new TextEncoder().encode("Hello World"));
* Deno.fdatasyncSync(file.rid);
* console.log(Deno.readTextFileSync("my_file.txt")); // Hello World
* ```
*
* @category File System
*/
export function fdatasyncSync(rid: number): void;
/** Close the given resource ID (`rid`) which has been previously opened, such
* as via opening or creating a file. Closing a file when you are finished
* with it is important to avoid leaking resources.
*
* ```ts
* const file = await Deno.open("my_file.txt");
* // do work with "file" object
* Deno.close(file.rid);
* ```
*
* It is recommended to define the variable with the `using` keyword so the
* runtime will automatically close the resource when it goes out of scope.
* Doing so negates the need to manually close the resource.
*
* ```ts
* using file = await Deno.open("my_file.txt");
* // do work with "file" object
* ```
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O
*/
export function close(rid: number): void;
/** The Deno abstraction for reading and writing files.
*
* This is the most straight forward way of handling files within Deno and is
* recommended over using the discrete functions within the `Deno` namespace.
*
* ```ts
* using file = await Deno.open("/foo/bar.txt", { read: true });
* const fileInfo = await file.stat();
* if (fileInfo.isFile) {
* const buf = new Uint8Array(100);
* const numberOfBytesRead = await file.read(buf); // 11 bytes
* const text = new TextDecoder().decode(buf); // "hello world"
* }
* ```
*
* @category File System
*/
export class FsFile
implements
Reader,
ReaderSync,
Writer,
WriterSync,
Seeker,
SeekerSync,
Closer,
Disposable {
/**
* The resource ID associated with the file instance. The resource ID
* should be considered an opaque reference to resource.
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*/
readonly rid: number;
/** A {@linkcode ReadableStream} instance representing to the byte contents
* of the file. This makes it easy to interoperate with other web streams
* based APIs.
*
* ```ts
* using file = await Deno.open("my_file.txt", { read: true });
* const decoder = new TextDecoder();
* for await (const chunk of file.readable) {
* console.log(decoder.decode(chunk));
* }
* ```
*/
readonly readable: ReadableStream<Uint8Array>;
/** A {@linkcode WritableStream} instance to write the contents of the
* file. This makes it easy to interoperate with other web streams based
* APIs.
*
* ```ts
* const items = ["hello", "world"];
* using file = await Deno.open("my_file.txt", { write: true });
* const encoder = new TextEncoder();
* const writer = file.writable.getWriter();
* for (const item of items) {
* await writer.write(encoder.encode(item));
* }
* ```
*/
readonly writable: WritableStream<Uint8Array>;
/**
* The constructor which takes a resource ID. Generally `FsFile` should
* not be constructed directly. Instead use {@linkcode Deno.open} or
* {@linkcode Deno.openSync} to create a new instance of `FsFile`.
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*/
constructor(rid: number);
/** Write the contents of the array buffer (`p`) to the file.
*
* Resolves to the number of bytes written.
*
* **It is not guaranteed that the full buffer will be written in a single
* call.**
*
* ```ts
* const encoder = new TextEncoder();
* const data = encoder.encode("Hello world");
* using file = await Deno.open("/foo/bar.txt", { write: true });
* const bytesWritten = await file.write(data); // 11
* ```
*
* @category I/O
*/
write(p: Uint8Array): Promise<number>;
/** Synchronously write the contents of the array buffer (`p`) to the file.
*
* Returns the number of bytes written.
*
* **It is not guaranteed that the full buffer will be written in a single
* call.**
*
* ```ts
* const encoder = new TextEncoder();
* const data = encoder.encode("Hello world");
* using file = Deno.openSync("/foo/bar.txt", { write: true });
* const bytesWritten = file.writeSync(data); // 11
* ```
*/
writeSync(p: Uint8Array): number;
/** Truncates (or extends) the file to reach the specified `len`. If `len`
* is not specified, then the entire file contents are truncated.
*
* ### Truncate the entire file
*
* ```ts
* using file = await Deno.open("my_file.txt", { write: true });
* await file.truncate();
* ```
*
* ### Truncate part of the file
*
* ```ts
* // if "my_file.txt" contains the text "hello world":
* using file = await Deno.open("my_file.txt", { write: true });
* await file.truncate(7);
* const buf = new Uint8Array(100);
* await file.read(buf);
* const text = new TextDecoder().decode(buf); // "hello w"
* ```
*/
truncate(len?: number): Promise<void>;
/** Synchronously truncates (or extends) the file to reach the specified
* `len`. If `len` is not specified, then the entire file contents are
* truncated.
*
* ### Truncate the entire file
*
* ```ts
* using file = Deno.openSync("my_file.txt", { write: true });
* file.truncateSync();
* ```
*
* ### Truncate part of the file
*
* ```ts
* // if "my_file.txt" contains the text "hello world":
* using file = Deno.openSync("my_file.txt", { write: true });
* file.truncateSync(7);
* const buf = new Uint8Array(100);
* file.readSync(buf);
* const text = new TextDecoder().decode(buf); // "hello w"
* ```
*/
truncateSync(len?: number): void;
/** Read the file into an array buffer (`p`).
*
* Resolves to either the number of bytes read during the operation or EOF
* (`null`) if there was nothing more to read.
*
* It is possible for a read to successfully return with `0` bytes. This
* does not indicate EOF.
*
* **It is not guaranteed that the full buffer will be read in a single
* call.**
*
* ```ts
* // if "/foo/bar.txt" contains the text "hello world":
* using file = await Deno.open("/foo/bar.txt");
* const buf = new Uint8Array(100);
* const numberOfBytesRead = await file.read(buf); // 11 bytes
* const text = new TextDecoder().decode(buf); // "hello world"
* ```
*/
read(p: Uint8Array): Promise<number | null>;
/** Synchronously read from the file into an array buffer (`p`).
*
* Returns either the number of bytes read during the operation or EOF
* (`null`) if there was nothing more to read.
*
* It is possible for a read to successfully return with `0` bytes. This
* does not indicate EOF.
*
* **It is not guaranteed that the full buffer will be read in a single
* call.**
*
* ```ts
* // if "/foo/bar.txt" contains the text "hello world":
* using file = Deno.openSync("/foo/bar.txt");
* const buf = new Uint8Array(100);
* const numberOfBytesRead = file.readSync(buf); // 11 bytes
* const text = new TextDecoder().decode(buf); // "hello world"
* ```
*/
readSync(p: Uint8Array): number | null;
/** Seek to the given `offset` under mode given by `whence`. The call
* resolves to the new position within the resource (bytes from the start).
*
* ```ts
* // Given file pointing to file with "Hello world", which is 11 bytes long:
* using file = await Deno.open(
* "hello.txt",
* { read: true, write: true, truncate: true, create: true },
* );
* await file.write(new TextEncoder().encode("Hello world"));
*
* // advance cursor 6 bytes
* const cursorPosition = await file.seek(6, Deno.SeekMode.Start);
* console.log(cursorPosition); // 6
* const buf = new Uint8Array(100);
* await file.read(buf);
* console.log(new TextDecoder().decode(buf)); // "world"
* ```
*
* The seek modes work as follows:
*
* ```ts
* // Given file.rid pointing to file with "Hello world", which is 11 bytes long:
* const file = await Deno.open(
* "hello.txt",
* { read: true, write: true, truncate: true, create: true },
* );
* await file.write(new TextEncoder().encode("Hello world"));
*
* // Seek 6 bytes from the start of the file
* console.log(await file.seek(6, Deno.SeekMode.Start)); // "6"
* // Seek 2 more bytes from the current position
* console.log(await file.seek(2, Deno.SeekMode.Current)); // "8"
* // Seek backwards 2 bytes from the end of the file
* console.log(await file.seek(-2, Deno.SeekMode.End)); // "9" (i.e. 11-2)
* ```
*/
seek(offset: number | bigint, whence: SeekMode): Promise<number>;
/** Synchronously seek to the given `offset` under mode given by `whence`.
* The new position within the resource (bytes from the start) is returned.
*
* ```ts
* using file = Deno.openSync(
* "hello.txt",
* { read: true, write: true, truncate: true, create: true },
* );
* file.writeSync(new TextEncoder().encode("Hello world"));
*
* // advance cursor 6 bytes
* const cursorPosition = file.seekSync(6, Deno.SeekMode.Start);
* console.log(cursorPosition); // 6
* const buf = new Uint8Array(100);
* file.readSync(buf);
* console.log(new TextDecoder().decode(buf)); // "world"
* ```
*
* The seek modes work as follows:
*
* ```ts
* // Given file.rid pointing to file with "Hello world", which is 11 bytes long:
* using file = Deno.openSync(
* "hello.txt",
* { read: true, write: true, truncate: true, create: true },
* );
* file.writeSync(new TextEncoder().encode("Hello world"));
*
* // Seek 6 bytes from the start of the file
* console.log(file.seekSync(6, Deno.SeekMode.Start)); // "6"
* // Seek 2 more bytes from the current position
* console.log(file.seekSync(2, Deno.SeekMode.Current)); // "8"
* // Seek backwards 2 bytes from the end of the file
* console.log(file.seekSync(-2, Deno.SeekMode.End)); // "9" (i.e. 11-2)
* ```
*/
seekSync(offset: number | bigint, whence: SeekMode): number;
/** Resolves to a {@linkcode Deno.FileInfo} for the file.
*
* ```ts
* import { assert } from "jsr:@std/assert";
*
* using file = await Deno.open("hello.txt");
* const fileInfo = await file.stat();
* assert(fileInfo.isFile);
* ```
*/
stat(): Promise<FileInfo>;
/** Synchronously returns a {@linkcode Deno.FileInfo} for the file.
*
* ```ts
* import { assert } from "jsr:@std/assert";
*
* using file = Deno.openSync("hello.txt")
* const fileInfo = file.statSync();
* assert(fileInfo.isFile);
* ```
*/
statSync(): FileInfo;
/**
* Flushes any pending data and metadata operations of the given file
* stream to disk.
*
* ```ts
* const file = await Deno.open(
* "my_file.txt",
* { read: true, write: true, create: true },
* );
* await file.write(new TextEncoder().encode("Hello World"));
* await file.truncate(1);
* await file.sync();
* console.log(await Deno.readTextFile("my_file.txt")); // H
* ```
*
* @category I/O
*/
sync(): Promise<void>;
/**
* Synchronously flushes any pending data and metadata operations of the given
* file stream to disk.
*
* ```ts
* const file = Deno.openSync(
* "my_file.txt",
* { read: true, write: true, create: true },
* );
* file.writeSync(new TextEncoder().encode("Hello World"));
* file.truncateSync(1);
* file.syncSync();
* console.log(Deno.readTextFileSync("my_file.txt")); // H
* ```
*
* @category I/O
*/
syncSync(): void;
/**
* Flushes any pending data operations of the given file stream to disk.
* ```ts
* using file = await Deno.open(
* "my_file.txt",
* { read: true, write: true, create: true },
* );
* await file.write(new TextEncoder().encode("Hello World"));
* await file.syncData();
* console.log(await Deno.readTextFile("my_file.txt")); // Hello World
* ```
*
* @category I/O
*/
syncData(): Promise<void>;
/**
* Synchronously flushes any pending data operations of the given file stream
* to disk.
*
* ```ts
* using file = Deno.openSync(
* "my_file.txt",
* { read: true, write: true, create: true },
* );
* file.writeSync(new TextEncoder().encode("Hello World"));
* file.syncDataSync();
* console.log(Deno.readTextFileSync("my_file.txt")); // Hello World
* ```
*
* @category I/O
*/
syncDataSync(): void;
/**
* Changes the access (`atime`) and modification (`mtime`) times of the
* file stream resource. Given times are either in seconds (UNIX epoch
* time) or as `Date` objects.
*
* ```ts
* using file = await Deno.open("file.txt", { create: true, write: true });
* await file.utime(1556495550, new Date());
* ```
*
* @category File System
*/
utime(atime: number | Date, mtime: number | Date): Promise<void>;
/**
* Synchronously changes the access (`atime`) and modification (`mtime`)
* times of the file stream resource. Given times are either in seconds
* (UNIX epoch time) or as `Date` objects.
*
* ```ts
* using file = Deno.openSync("file.txt", { create: true, write: true });
* file.utime(1556495550, new Date());
* ```
*
* @category File System
*/
utimeSync(atime: number | Date, mtime: number | Date): void;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Checks if the file resource is a TTY (terminal).
*
* ```ts
* // This example is system and context specific
* using file = await Deno.open("/dev/tty6");
* file.isTerminal(); // true
* ```
*/
isTerminal(): boolean;
/** **UNSTABLE**: New API, yet to be vetted.
*
* Set TTY to be under raw mode or not. In raw mode, characters are read and
* returned as is, without being processed. All special processing of
* characters by the terminal is disabled, including echoing input
* characters. Reading from a TTY device in raw mode is faster than reading
* from a TTY device in canonical mode.
*
* ```ts
* using file = await Deno.open("/dev/tty6");
* file.setRaw(true, { cbreak: true });
* ```
*/
setRaw(mode: boolean, options?: SetRawOptions): void;
/**
* Acquire an advisory file-system lock for the file.
*
* @param [exclusive=false]
*/
lock(exclusive?: boolean): Promise<void>;
/**
* Synchronously acquire an advisory file-system lock synchronously for the file.
*
* @param [exclusive=false]
*/
lockSync(exclusive?: boolean): void;
/**
* Release an advisory file-system lock for the file.
*/
unlock(): Promise<void>;
/**
* Synchronously release an advisory file-system lock for the file.
*/
unlockSync(): void;
/** Close the file. Closing a file when you are finished with it is
* important to avoid leaking resources.
*
* ```ts
* using file = await Deno.open("my_file.txt");
* // do work with "file" object
* ```
*/
close(): void;
[Symbol.dispose](): void;
}
/**
* The Deno abstraction for reading and writing files.
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category File System
*/
export const File: typeof FsFile;
/** Gets the size of the console as columns/rows.
*
* ```ts
* const { columns, rows } = Deno.consoleSize();
* ```
*
* This returns the size of the console window as reported by the operating
* system. It's not a reflection of how many characters will fit within the
* console window, but can be used as part of that calculation.
*
* @category I/O
*/
export function consoleSize(): {
columns: number;
rows: number;
};
/** @category I/O */
export interface SetRawOptions {
/**
* The `cbreak` option can be used to indicate that characters that
* correspond to a signal should still be generated. When disabling raw
* mode, this option is ignored. This functionality currently only works on
* Linux and Mac OS.
*/
cbreak: boolean;
}
/** A reference to `stdin` which can be used to read directly from `stdin`.
* It implements the Deno specific {@linkcode Reader}, {@linkcode ReaderSync},
* and {@linkcode Closer} interfaces as well as provides a
* {@linkcode ReadableStream} interface.
*
* ### Reading chunks from the readable stream
*
* ```ts
* const decoder = new TextDecoder();
* for await (const chunk of Deno.stdin.readable) {
* const text = decoder.decode(chunk);
* // do something with the text
* }
* ```
*
* @category I/O
*/
export const stdin: Reader & ReaderSync & Closer & {
/**
* The resource ID assigned to `stdin`. This can be used with the discrete
* I/O functions in the `Deno` namespace.
*
* @deprecated This will be soft-removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*/
readonly rid: number;
/** A readable stream interface to `stdin`. */
readonly readable: ReadableStream<Uint8Array>;
/**
* Set TTY to be under raw mode or not. In raw mode, characters are read and
* returned as is, without being processed. All special processing of
* characters by the terminal is disabled, including echoing input
* characters. Reading from a TTY device in raw mode is faster than reading
* from a TTY device in canonical mode.
*
* ```ts
* Deno.stdin.setRaw(true, { cbreak: true });
* ```
*
* @category I/O
*/
setRaw(mode: boolean, options?: SetRawOptions): void;
/**
* Checks if `stdin` is a TTY (terminal).
*
* ```ts
* // This example is system and context specific
* Deno.stdin.isTerminal(); // true
* ```
*
* @category I/O
*/
isTerminal(): boolean;
};
/** A reference to `stdout` which can be used to write directly to `stdout`.
* It implements the Deno specific {@linkcode Writer}, {@linkcode WriterSync},
* and {@linkcode Closer} interfaces as well as provides a
* {@linkcode WritableStream} interface.
*
* These are low level constructs, and the {@linkcode console} interface is a
* more straight forward way to interact with `stdout` and `stderr`.
*
* @category I/O
*/
export const stdout: Writer & WriterSync & Closer & {
/**
* The resource ID assigned to `stdout`. This can be used with the discrete
* I/O functions in the `Deno` namespace.
*
* @deprecated This will be soft-removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*/
readonly rid: number;
/** A writable stream interface to `stdout`. */
readonly writable: WritableStream<Uint8Array>;
/**
* Checks if `stdout` is a TTY (terminal).
*
* ```ts
* // This example is system and context specific
* Deno.stdout.isTerminal(); // true
* ```
*
* @category I/O
*/
isTerminal(): boolean;
};
/** A reference to `stderr` which can be used to write directly to `stderr`.
* It implements the Deno specific {@linkcode Writer}, {@linkcode WriterSync},
* and {@linkcode Closer} interfaces as well as provides a
* {@linkcode WritableStream} interface.
*
* These are low level constructs, and the {@linkcode console} interface is a
* more straight forward way to interact with `stdout` and `stderr`.
*
* @category I/O
*/
export const stderr: Writer & WriterSync & Closer & {
/**
* The resource ID assigned to `stderr`. This can be used with the discrete
* I/O functions in the `Deno` namespace.
*
* @deprecated This will be soft-removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*/
readonly rid: number;
/** A writable stream interface to `stderr`. */
readonly writable: WritableStream<Uint8Array>;
/**
* Checks if `stderr` is a TTY (terminal).
*
* ```ts
* // This example is system and context specific
* Deno.stderr.isTerminal(); // true
* ```
*
* @category I/O
*/
isTerminal(): boolean;
};
/**
* Options which can be set when doing {@linkcode Deno.open} and
* {@linkcode Deno.openSync}.
*
* @category File System */
export interface OpenOptions {
/** Sets the option for read access. This option, when `true`, means that
* the file should be read-able if opened.
*
* @default {true} */
read?: boolean;
/** Sets the option for write access. This option, when `true`, means that
* the file should be write-able if opened. If the file already exists,
* any write calls on it will overwrite its contents, by default without
* truncating it.
*
* @default {false} */
write?: boolean;
/** Sets the option for the append mode. This option, when `true`, means
* that writes will append to a file instead of overwriting previous
* contents.
*
* Note that setting `{ write: true, append: true }` has the same effect as
* setting only `{ append: true }`.
*
* @default {false} */
append?: boolean;
/** Sets the option for truncating a previous file. If a file is
* successfully opened with this option set it will truncate the file to `0`
* size if it already exists. The file must be opened with write access
* for truncate to work.
*
* @default {false} */
truncate?: boolean;
/** Sets the option to allow creating a new file, if one doesn't already
* exist at the specified path. Requires write or append access to be
* used.
*
* @default {false} */
create?: boolean;
/** If set to `true`, no file, directory, or symlink is allowed to exist at
* the target location. Requires write or append access to be used. When
* createNew is set to `true`, create and truncate are ignored.
*
* @default {false} */
createNew?: boolean;
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/** Permissions to use if creating the file (defaults to `0o666`, before
* the process's umask).
*
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* Ignored on Windows. */
mode?: number;
}
/**
* Options which can be set when using {@linkcode Deno.readFile} or
* {@linkcode Deno.readFileSync}.
*
* @category File System */
export interface ReadFileOptions {
/**
* An abort signal to allow cancellation of the file read operation.
* If the signal becomes aborted the readFile operation will be stopped
* and the promise returned will be rejected with an AbortError.
*/
signal?: AbortSignal;
}
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/**
* Check if a given resource id (`rid`) is a TTY (a terminal).
*
* ```ts
* // This example is system and context specific
* const nonTTYRid = Deno.openSync("my_file.txt").rid;
* const ttyRid = Deno.openSync("/dev/tty6").rid;
* console.log(Deno.isatty(nonTTYRid)); // false
* console.log(Deno.isatty(ttyRid)); // true
* ```
*
* @deprecated This will be soft-removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O
*/
export function isatty(rid: number): boolean;
/**
* A variable-sized buffer of bytes with `read()` and `write()` methods.
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O
*/
export class Buffer implements Reader, ReaderSync, Writer, WriterSync {
constructor(ab?: ArrayBuffer);
/** Returns a slice holding the unread portion of the buffer.
*
* The slice is valid for use only until the next buffer modification (that
* is, only until the next call to a method like `read()`, `write()`,
* `reset()`, or `truncate()`). If `options.copy` is false the slice aliases the buffer content at
* least until the next buffer modification, so immediate changes to the
* slice will affect the result of future reads.
* @param options Defaults to `{ copy: true }`
*/
bytes(options?: { copy?: boolean }): Uint8Array;
/** Returns whether the unread portion of the buffer is empty. */
empty(): boolean;
/** A read only number of bytes of the unread portion of the buffer. */
readonly length: number;
/** The read only capacity of the buffer's underlying byte slice, that is,
* the total space allocated for the buffer's data. */
readonly capacity: number;
/** Discards all but the first `n` unread bytes from the buffer but
* continues to use the same allocated storage. It throws if `n` is
* negative or greater than the length of the buffer. */
truncate(n: number): void;
/** Resets the buffer to be empty, but it retains the underlying storage for
* use by future writes. `.reset()` is the same as `.truncate(0)`. */
reset(): void;
/** Reads the next `p.length` bytes from the buffer or until the buffer is
* drained. Returns the number of bytes read. If the buffer has no data to
* return, the return is EOF (`null`). */
readSync(p: Uint8Array): number | null;
/** Reads the next `p.length` bytes from the buffer or until the buffer is
* drained. Resolves to the number of bytes read. If the buffer has no
* data to return, resolves to EOF (`null`).
*
* NOTE: This methods reads bytes synchronously; it's provided for
* compatibility with `Reader` interfaces.
*/
read(p: Uint8Array): Promise<number | null>;
writeSync(p: Uint8Array): number;
/** NOTE: This methods writes bytes synchronously; it's provided for
* compatibility with `Writer` interface. */
write(p: Uint8Array): Promise<number>;
/** Grows the buffer's capacity, if necessary, to guarantee space for
* another `n` bytes. After `.grow(n)`, at least `n` bytes can be written to
* the buffer without another allocation. If `n` is negative, `.grow()` will
* throw. If the buffer can't grow it will throw an error.
*
* Based on Go Lang's
* [Buffer.Grow](https://golang.org/pkg/bytes/#Buffer.Grow). */
grow(n: number): void;
/** Reads data from `r` until EOF (`null`) and appends it to the buffer,
* growing the buffer as needed. It resolves to the number of bytes read.
* If the buffer becomes too large, `.readFrom()` will reject with an error.
*
* Based on Go Lang's
* [Buffer.ReadFrom](https://golang.org/pkg/bytes/#Buffer.ReadFrom). */
readFrom(r: Reader): Promise<number>;
/** Reads data from `r` until EOF (`null`) and appends it to the buffer,
* growing the buffer as needed. It returns the number of bytes read. If the
* buffer becomes too large, `.readFromSync()` will throw an error.
*
* Based on Go Lang's
* [Buffer.ReadFrom](https://golang.org/pkg/bytes/#Buffer.ReadFrom). */
readFromSync(r: ReaderSync): number;
}
/**
* Read Reader `r` until EOF (`null`) and resolve to the content as
* Uint8Array`.
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*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O
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*/
export function readAll(r: Reader): Promise<Uint8Array>;
/**
* Synchronously reads Reader `r` until EOF (`null`) and returns the content
* as `Uint8Array`.
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*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O
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*/
export function readAllSync(r: ReaderSync): Uint8Array;
/**
* Write all the content of the array buffer (`arr`) to the writer (`w`).
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O
*/
export function writeAll(w: Writer, arr: Uint8Array): Promise<void>;
/**
* Synchronously write all the content of the array buffer (`arr`) to the
* writer (`w`).
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O
*/
export function writeAllSync(w: WriterSync, arr: Uint8Array): void;
/**
* Options which can be set when using {@linkcode Deno.mkdir} and
* {@linkcode Deno.mkdirSync}.
*
* @category File System */
export interface MkdirOptions {
/** If set to `true`, means that any intermediate directories will also be
* created (as with the shell command `mkdir -p`).
*
* Intermediate directories are created with the same permissions.
*
* When recursive is set to `true`, succeeds silently (without changing any
* permissions) if a directory already exists at the path, or if the path
* is a symlink to an existing directory.
*
* @default {false} */
recursive?: boolean;
/** Permissions to use when creating the directory (defaults to `0o777`,
* before the process's umask).
*
* Ignored on Windows. */
mode?: number;
}
/** Creates a new directory with the specified path.
*
* ```ts
* await Deno.mkdir("new_dir");
* await Deno.mkdir("nested/directories", { recursive: true });
* await Deno.mkdir("restricted_access_dir", { mode: 0o700 });
* ```
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*
* Defaults to throwing error if the directory already exists.
*
* Requires `allow-write` permission.
*
* @tags allow-write
* @category File System
*/
export function mkdir(
path: string | URL,
options?: MkdirOptions,
): Promise<void>;
/** Synchronously creates a new directory with the specified path.
*
* ```ts
* Deno.mkdirSync("new_dir");
* Deno.mkdirSync("nested/directories", { recursive: true });
* Deno.mkdirSync("restricted_access_dir", { mode: 0o700 });
* ```
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*
* Defaults to throwing error if the directory already exists.
*
* Requires `allow-write` permission.
*
* @tags allow-write
* @category File System
*/
export function mkdirSync(path: string | URL, options?: MkdirOptions): void;
/**
* Options which can be set when using {@linkcode Deno.makeTempDir},
* {@linkcode Deno.makeTempDirSync}, {@linkcode Deno.makeTempFile}, and
* {@linkcode Deno.makeTempFileSync}.
*
* @category File System */
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export interface MakeTempOptions {
/** Directory where the temporary directory should be created (defaults to
* the env variable `TMPDIR`, or the system's default, usually `/tmp`).
*
* Note that if the passed `dir` is relative, the path returned by
* `makeTempFile()` and `makeTempDir()` will also be relative. Be mindful of
* this when changing working directory. */
dir?: string;
/** String that should precede the random portion of the temporary
* directory's name. */
prefix?: string;
/** String that should follow the random portion of the temporary
* directory's name. */
suffix?: string;
}
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/** Creates a new temporary directory in the default directory for temporary
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* files, unless `dir` is specified. Other optional options include
* prefixing and suffixing the directory name with `prefix` and `suffix`
* respectively.
*
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* This call resolves to the full path to the newly created directory.
*
* Multiple programs calling this function simultaneously will create different
* directories. It is the caller's responsibility to remove the directory when
* no longer needed.
*
* ```ts
* const tempDirName0 = await Deno.makeTempDir(); // e.g. /tmp/2894ea76
* const tempDirName1 = await Deno.makeTempDir({ prefix: 'my_temp' }); // e.g. /tmp/my_temp339c944d
* ```
*
* Requires `allow-write` permission.
*
* @tags allow-write
* @category File System
*/
// TODO(ry) Doesn't check permissions.
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export function makeTempDir(options?: MakeTempOptions): Promise<string>;
/** Synchronously creates a new temporary directory in the default directory
* for temporary files, unless `dir` is specified. Other optional options
* include prefixing and suffixing the directory name with `prefix` and
* `suffix` respectively.
*
* The full path to the newly created directory is returned.
*
* Multiple programs calling this function simultaneously will create different
* directories. It is the caller's responsibility to remove the directory when
* no longer needed.
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*
* ```ts
* const tempDirName0 = Deno.makeTempDirSync(); // e.g. /tmp/2894ea76
* const tempDirName1 = Deno.makeTempDirSync({ prefix: 'my_temp' }); // e.g. /tmp/my_temp339c944d
* ```
*
* Requires `allow-write` permission.
*
* @tags allow-write
* @category File System
*/
// TODO(ry) Doesn't check permissions.
export function makeTempDirSync(options?: MakeTempOptions): string;
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/** Creates a new temporary file in the default directory for temporary
* files, unless `dir` is specified.
*
* Other options include prefixing and suffixing the directory name with
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* `prefix` and `suffix` respectively.
*
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* This call resolves to the full path to the newly created file.
*
* Multiple programs calling this function simultaneously will create
* different files. It is the caller's responsibility to remove the file when
* no longer needed.
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*
* ```ts
* const tmpFileName0 = await Deno.makeTempFile(); // e.g. /tmp/419e0bf2
* const tmpFileName1 = await Deno.makeTempFile({ prefix: 'my_temp' }); // e.g. /tmp/my_temp754d3098
* ```
*
* Requires `allow-write` permission.
*
* @tags allow-write
* @category File System
*/
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export function makeTempFile(options?: MakeTempOptions): Promise<string>;
/** Synchronously creates a new temporary file in the default directory for
* temporary files, unless `dir` is specified.
*
* Other options include prefixing and suffixing the directory name with
* `prefix` and `suffix` respectively.
*
* The full path to the newly created file is returned.
*
* Multiple programs calling this function simultaneously will create
* different files. It is the caller's responsibility to remove the file when
* no longer needed.
*
* ```ts
* const tempFileName0 = Deno.makeTempFileSync(); // e.g. /tmp/419e0bf2
* const tempFileName1 = Deno.makeTempFileSync({ prefix: 'my_temp' }); // e.g. /tmp/my_temp754d3098
* ```
*
* Requires `allow-write` permission.
*
* @tags allow-write
* @category File System
*/
export function makeTempFileSync(options?: MakeTempOptions): string;
/** Changes the permission of a specific file/directory of specified path.
* Ignores the process's umask.
*
* ```ts
* await Deno.chmod("/path/to/file", 0o666);
* ```
*
* The mode is a sequence of 3 octal numbers. The first/left-most number
* specifies the permissions for the owner. The second number specifies the
* permissions for the group. The last/right-most number specifies the
* permissions for others. For example, with a mode of 0o764, the owner (7)
* can read/write/execute, the group (6) can read/write and everyone else (4)
* can read only.
*
* | Number | Description |
* | ------ | ----------- |
* | 7 | read, write, and execute |
* | 6 | read and write |
* | 5 | read and execute |
* | 4 | read only |
* | 3 | write and execute |
* | 2 | write only |
* | 1 | execute only |
* | 0 | no permission |
*
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* NOTE: This API currently throws on Windows
*
* Requires `allow-write` permission.
*
* @tags allow-write
* @category File System
*/
export function chmod(path: string | URL, mode: number): Promise<void>;
/** Synchronously changes the permission of a specific file/directory of
* specified path. Ignores the process's umask.
*
* ```ts
* Deno.chmodSync("/path/to/file", 0o666);
* ```
*
* For a full description, see {@linkcode Deno.chmod}.
*
* NOTE: This API currently throws on Windows
*
* Requires `allow-write` permission.
*
* @tags allow-write
* @category File System
*/
export function chmodSync(path: string | URL, mode: number): void;
/** Change owner of a regular file or directory.
*
* This functionality is not available on Windows.
*
* ```ts
* await Deno.chown("myFile.txt", 1000, 1002);
* ```
*
* Requires `allow-write` permission.
*
* Throws Error (not implemented) if executed on Windows.
*
* @tags allow-write
* @category File System
*
* @param path path to the file
* @param uid user id (UID) of the new owner, or `null` for no change
* @param gid group id (GID) of the new owner, or `null` for no change
*/
export function chown(
path: string | URL,
uid: number | null,
gid: number | null,
): Promise<void>;
/** Synchronously change owner of a regular file or directory.
*
* This functionality is not available on Windows.
*
* ```ts
* Deno.chownSync("myFile.txt", 1000, 1002);
* ```
*
* Requires `allow-write` permission.
*
* Throws Error (not implemented) if executed on Windows.
*
* @tags allow-write
* @category File System
*
* @param path path to the file
* @param uid user id (UID) of the new owner, or `null` for no change
* @param gid group id (GID) of the new owner, or `null` for no change
*/
export function chownSync(
path: string | URL,
uid: number | null,
gid: number | null,
): void;
/**
* Options which can be set when using {@linkcode Deno.remove} and
* {@linkcode Deno.removeSync}.
*
* @category File System */
export interface RemoveOptions {
/** If set to `true`, path will be removed even if it's a non-empty directory.
*
* @default {false} */
recursive?: boolean;
}
/** Removes the named file or directory.
*
* ```ts
* await Deno.remove("/path/to/empty_dir/or/file");
* await Deno.remove("/path/to/populated_dir/or/file", { recursive: true });
* ```
*
* Throws error if permission denied, path not found, or path is a non-empty
* directory and the `recursive` option isn't set to `true`.
*
* Requires `allow-write` permission.
*
* @tags allow-write
* @category File System
*/
export function remove(
path: string | URL,
options?: RemoveOptions,
): Promise<void>;
/** Synchronously removes the named file or directory.
*
* ```ts
* Deno.removeSync("/path/to/empty_dir/or/file");
* Deno.removeSync("/path/to/populated_dir/or/file", { recursive: true });
* ```
*
* Throws error if permission denied, path not found, or path is a non-empty
* directory and the `recursive` option isn't set to `true`.
*
* Requires `allow-write` permission.
*
* @tags allow-write
* @category File System
*/
export function removeSync(path: string | URL, options?: RemoveOptions): void;
/** Synchronously renames (moves) `oldpath` to `newpath`. Paths may be files or
* directories. If `newpath` already exists and is not a directory,
* `renameSync()` replaces it. OS-specific restrictions may apply when
* `oldpath` and `newpath` are in different directories.
*
* ```ts
* Deno.renameSync("old/path", "new/path");
* ```
*
* On Unix-like OSes, this operation does not follow symlinks at either path.
*
* It varies between platforms when the operation throws errors, and if so what
* they are. It's always an error to rename anything to a non-empty directory.
*
* Requires `allow-read` and `allow-write` permissions.
*
* @tags allow-read, allow-write
* @category File System
*/
export function renameSync(
oldpath: string | URL,
newpath: string | URL,
): void;
/** Renames (moves) `oldpath` to `newpath`. Paths may be files or directories.
* If `newpath` already exists and is not a directory, `rename()` replaces it.
* OS-specific restrictions may apply when `oldpath` and `newpath` are in
* different directories.
*
* ```ts
* await Deno.rename("old/path", "new/path");
* ```
*
* On Unix-like OSes, this operation does not follow symlinks at either path.
*
* It varies between platforms when the operation throws errors, and if so
* what they are. It's always an error to rename anything to a non-empty
* directory.
*
* Requires `allow-read` and `allow-write` permissions.
*
* @tags allow-read, allow-write
* @category File System
*/
export function rename(
oldpath: string | URL,
newpath: string | URL,
): Promise<void>;
/** Asynchronously reads and returns the entire contents of a file as an UTF-8
* decoded string. Reading a directory throws an error.
*
* ```ts
* const data = await Deno.readTextFile("hello.txt");
* console.log(data);
* ```
*
* Requires `allow-read` permission.
*
* @tags allow-read
* @category File System
*/
export function readTextFile(
path: string | URL,
options?: ReadFileOptions,
): Promise<string>;
/** Synchronously reads and returns the entire contents of a file as an UTF-8
* decoded string. Reading a directory throws an error.
*
* ```ts
* const data = Deno.readTextFileSync("hello.txt");
* console.log(data);
* ```
*
* Requires `allow-read` permission.
*
* @tags allow-read
* @category File System
*/
export function readTextFileSync(path: string | URL): string;
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/** Reads and resolves to the entire contents of a file as an array of bytes.
* `TextDecoder` can be used to transform the bytes to string if required.
* Reading a directory returns an empty data array.
*
* ```ts
* const decoder = new TextDecoder("utf-8");
* const data = await Deno.readFile("hello.txt");
* console.log(decoder.decode(data));
* ```
*
* Requires `allow-read` permission.
*
* @tags allow-read
* @category File System
*/
export function readFile(
path: string | URL,
options?: ReadFileOptions,
): Promise<Uint8Array>;
/** Synchronously reads and returns the entire contents of a file as an array
* of bytes. `TextDecoder` can be used to transform the bytes to string if
* required. Reading a directory returns an empty data array.
*
* ```ts
* const decoder = new TextDecoder("utf-8");
* const data = Deno.readFileSync("hello.txt");
* console.log(decoder.decode(data));
* ```
*
* Requires `allow-read` permission.
*
* @tags allow-read
* @category File System
*/
export function readFileSync(path: string | URL): Uint8Array;
/** Provides information about a file and is returned by
* {@linkcode Deno.stat}, {@linkcode Deno.lstat}, {@linkcode Deno.statSync},
* and {@linkcode Deno.lstatSync} or from calling `stat()` and `statSync()`
* on an {@linkcode Deno.FsFile} instance.
*
* @category File System
*/
export interface FileInfo {
/** True if this is info for a regular file. Mutually exclusive to
* `FileInfo.isDirectory` and `FileInfo.isSymlink`. */
isFile: boolean;
/** True if this is info for a regular directory. Mutually exclusive to
* `FileInfo.isFile` and `FileInfo.isSymlink`. */
isDirectory: boolean;
/** True if this is info for a symlink. Mutually exclusive to
* `FileInfo.isFile` and `FileInfo.isDirectory`. */
isSymlink: boolean;
/** The size of the file, in bytes. */
size: number;
/** The last modification time of the file. This corresponds to the `mtime`
* field from `stat` on Linux/Mac OS and `ftLastWriteTime` on Windows. This
* may not be available on all platforms. */
mtime: Date | null;
/** The last access time of the file. This corresponds to the `atime`
* field from `stat` on Unix and `ftLastAccessTime` on Windows. This may not
* be available on all platforms. */
atime: Date | null;
/** The creation time of the file. This corresponds to the `birthtime`
* field from `stat` on Mac/BSD and `ftCreationTime` on Windows. This may
* not be available on all platforms. */
birthtime: Date | null;
/** ID of the device containing the file. */
dev: number;
/** Inode number.
*
* _Linux/Mac OS only._ */
ino: number | null;
/** The underlying raw `st_mode` bits that contain the standard Unix
* permissions for this file/directory.
*
* _Linux/Mac OS only._ */
mode: number | null;
/** Number of hard links pointing to this file.
*
* _Linux/Mac OS only._ */
nlink: number | null;
/** User ID of the owner of this file.
*
* _Linux/Mac OS only._ */
uid: number | null;
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/** Group ID of the owner of this file.
*
* _Linux/Mac OS only._ */
gid: number | null;
/** Device ID of this file.
*
* _Linux/Mac OS only._ */
rdev: number | null;
/** Blocksize for filesystem I/O.
*
* _Linux/Mac OS only._ */
blksize: number | null;
/** Number of blocks allocated to the file, in 512-byte units.
*
* _Linux/Mac OS only._ */
blocks: number | null;
/** True if this is info for a block device.
*
* _Linux/Mac OS only._ */
isBlockDevice: boolean | null;
/** True if this is info for a char device.
*
* _Linux/Mac OS only._ */
isCharDevice: boolean | null;
/** True if this is info for a fifo.
*
* _Linux/Mac OS only._ */
isFifo: boolean | null;
/** True if this is info for a socket.
*
* _Linux/Mac OS only._ */
isSocket: boolean | null;
}
/** Resolves to the absolute normalized path, with symbolic links resolved.
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*
* ```ts
* // e.g. given /home/alice/file.txt and current directory /home/alice
* await Deno.symlink("file.txt", "symlink_file.txt");
* const realPath = await Deno.realPath("./file.txt");
* const realSymLinkPath = await Deno.realPath("./symlink_file.txt");
* console.log(realPath); // outputs "/home/alice/file.txt"
* console.log(realSymLinkPath); // outputs "/home/alice/file.txt"
* ```
*
* Requires `allow-read` permission for the target path.
*
* Also requires `allow-read` permission for the `CWD` if the target path is
* relative.
*
* @tags allow-read
* @category File System
*/
export function realPath(path: string | URL): Promise<string>;
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/** Synchronously returns absolute normalized path, with symbolic links
* resolved.
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*
* ```ts
* // e.g. given /home/alice/file.txt and current directory /home/alice
* Deno.symlinkSync("file.txt", "symlink_file.txt");
* const realPath = Deno.realPathSync("./file.txt");
* const realSymLinkPath = Deno.realPathSync("./symlink_file.txt");
* console.log(realPath); // outputs "/home/alice/file.txt"
* console.log(realSymLinkPath); // outputs "/home/alice/file.txt"
* ```
*
* Requires `allow-read` permission for the target path.
*
* Also requires `allow-read` permission for the `CWD` if the target path is
* relative.
*
* @tags allow-read
* @category File System
*/
export function realPathSync(path: string | URL): string;
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/**
* Information about a directory entry returned from {@linkcode Deno.readDir}
* and {@linkcode Deno.readDirSync}.
*
* @category File System */
export interface DirEntry {
/** The file name of the entry. It is just the entity name and does not
* include the full path. */
name: string;
/** True if this is info for a regular file. Mutually exclusive to
* `DirEntry.isDirectory` and `DirEntry.isSymlink`. */
isFile: boolean;
/** True if this is info for a regular directory. Mutually exclusive to
* `DirEntry.isFile` and `DirEntry.isSymlink`. */
isDirectory: boolean;
/** True if this is info for a symlink. Mutually exclusive to
* `DirEntry.isFile` and `DirEntry.isDirectory`. */
isSymlink: boolean;
}
/** Reads the directory given by `path` and returns an async iterable of
* {@linkcode Deno.DirEntry}. The order of entries is not guaranteed.
*
* ```ts
* for await (const dirEntry of Deno.readDir("/")) {
* console.log(dirEntry.name);
* }
* ```
*
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* Throws error if `path` is not a directory.
*
* Requires `allow-read` permission.
*
* @tags allow-read
* @category File System
*/
export function readDir(path: string | URL): AsyncIterable<DirEntry>;
/** Synchronously reads the directory given by `path` and returns an iterable
* of {@linkcode Deno.DirEntry}. The order of entries is not guaranteed.
*
* ```ts
* for (const dirEntry of Deno.readDirSync("/")) {
* console.log(dirEntry.name);
* }
* ```
*
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* Throws error if `path` is not a directory.
*
* Requires `allow-read` permission.
*
* @tags allow-read
* @category File System
*/
export function readDirSync(path: string | URL): Iterable<DirEntry>;
/** Copies the contents and permissions of one file to another specified path,
* by default creating a new file if needed, else overwriting. Fails if target
* path is a directory or is unwritable.
*
* ```ts
* await Deno.copyFile("from.txt", "to.txt");
* ```
*
* Requires `allow-read` permission on `fromPath`.
*
* Requires `allow-write` permission on `toPath`.
*
* @tags allow-read, allow-write
* @category File System
*/
export function copyFile(
fromPath: string | URL,
toPath: string | URL,
): Promise<void>;
/** Synchronously copies the contents and permissions of one file to another
* specified path, by default creating a new file if needed, else overwriting.
* Fails if target path is a directory or is unwritable.
*
* ```ts
* Deno.copyFileSync("from.txt", "to.txt");
* ```
*
* Requires `allow-read` permission on `fromPath`.
*
* Requires `allow-write` permission on `toPath`.
*
* @tags allow-read, allow-write
* @category File System
*/
export function copyFileSync(
fromPath: string | URL,
toPath: string | URL,
): void;
/** Resolves to the full path destination of the named symbolic link.
*
* ```ts
* await Deno.symlink("./test.txt", "./test_link.txt");
* const target = await Deno.readLink("./test_link.txt"); // full path of ./test.txt
* ```
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*
* Throws TypeError if called with a hard link.
*
* Requires `allow-read` permission.
*
* @tags allow-read
* @category File System
*/
export function readLink(path: string | URL): Promise<string>;
/** Synchronously returns the full path destination of the named symbolic
* link.
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*
* ```ts
* Deno.symlinkSync("./test.txt", "./test_link.txt");
* const target = Deno.readLinkSync("./test_link.txt"); // full path of ./test.txt
* ```
*
* Throws TypeError if called with a hard link.
*
* Requires `allow-read` permission.
*
* @tags allow-read
* @category File System
*/
export function readLinkSync(path: string | URL): string;
/** Resolves to a {@linkcode Deno.FileInfo} for the specified `path`. If
* `path` is a symlink, information for the symlink will be returned instead
* of what it points to.
*
* ```ts
* import { assert } from "jsr:@std/assert";
* const fileInfo = await Deno.lstat("hello.txt");
* assert(fileInfo.isFile);
* ```
*
* Requires `allow-read` permission.
*
* @tags allow-read
* @category File System
*/
export function lstat(path: string | URL): Promise<FileInfo>;
/** Synchronously returns a {@linkcode Deno.FileInfo} for the specified
* `path`. If `path` is a symlink, information for the symlink will be
* returned instead of what it points to.
*
* ```ts
* import { assert } from "jsr:@std/assert";
* const fileInfo = Deno.lstatSync("hello.txt");
* assert(fileInfo.isFile);
* ```
*
* Requires `allow-read` permission.
*
* @tags allow-read
* @category File System
*/
export function lstatSync(path: string | URL): FileInfo;
/** Resolves to a {@linkcode Deno.FileInfo} for the specified `path`. Will
* always follow symlinks.
*
* ```ts
* import { assert } from "jsr:@std/assert";
* const fileInfo = await Deno.stat("hello.txt");
* assert(fileInfo.isFile);
* ```
*
* Requires `allow-read` permission.
*
* @tags allow-read
* @category File System
*/
export function stat(path: string | URL): Promise<FileInfo>;
/** Synchronously returns a {@linkcode Deno.FileInfo} for the specified
* `path`. Will always follow symlinks.
*
* ```ts
* import { assert } from "jsr:@std/assert";
* const fileInfo = Deno.statSync("hello.txt");
* assert(fileInfo.isFile);
* ```
*
* Requires `allow-read` permission.
*
* @tags allow-read
* @category File System
*/
export function statSync(path: string | URL): FileInfo;
/** Options for writing to a file.
*
* @category File System
*/
export interface WriteFileOptions {
/** If set to `true`, will append to a file instead of overwriting previous
* contents.
*
* @default {false} */
append?: boolean;
/** Sets the option to allow creating a new file, if one doesn't already
* exist at the specified path.
*
* @default {true} */
create?: boolean;
/** If set to `true`, no file, directory, or symlink is allowed to exist at
* the target location. When createNew is set to `true`, `create` is ignored.
*
* @default {false} */
createNew?: boolean;
/** Permissions always applied to file. */
mode?: number;
/** An abort signal to allow cancellation of the file write operation.
*
* If the signal becomes aborted the write file operation will be stopped
* and the promise returned will be rejected with an {@linkcode AbortError}.
*/
signal?: AbortSignal;
}
/** Write `data` to the given `path`, by default creating a new file if
* needed, else overwriting.
*
* ```ts
* const encoder = new TextEncoder();
* const data = encoder.encode("Hello world\n");
* await Deno.writeFile("hello1.txt", data); // overwrite "hello1.txt" or create it
* await Deno.writeFile("hello2.txt", data, { create: false }); // only works if "hello2.txt" exists
* await Deno.writeFile("hello3.txt", data, { mode: 0o777 }); // set permissions on new file
* await Deno.writeFile("hello4.txt", data, { append: true }); // add data to the end of the file
* ```
*
* Requires `allow-write` permission, and `allow-read` if `options.create` is
* `false`.
*
* @tags allow-read, allow-write
* @category File System
*/
export function writeFile(
path: string | URL,
data: Uint8Array | ReadableStream<Uint8Array>,
options?: WriteFileOptions,
): Promise<void>;
/** Synchronously write `data` to the given `path`, by default creating a new
* file if needed, else overwriting.
*
* ```ts
* const encoder = new TextEncoder();
* const data = encoder.encode("Hello world\n");
* Deno.writeFileSync("hello1.txt", data); // overwrite "hello1.txt" or create it
* Deno.writeFileSync("hello2.txt", data, { create: false }); // only works if "hello2.txt" exists
* Deno.writeFileSync("hello3.txt", data, { mode: 0o777 }); // set permissions on new file
* Deno.writeFileSync("hello4.txt", data, { append: true }); // add data to the end of the file
* ```
*
* Requires `allow-write` permission, and `allow-read` if `options.create` is
* `false`.
*
* @tags allow-read, allow-write
* @category File System
*/
export function writeFileSync(
path: string | URL,
data: Uint8Array,
options?: WriteFileOptions,
): void;
/** Write string `data` to the given `path`, by default creating a new file if
* needed, else overwriting.
*
* ```ts
* await Deno.writeTextFile("hello1.txt", "Hello world\n"); // overwrite "hello1.txt" or create it
* ```
*
* Requires `allow-write` permission, and `allow-read` if `options.create` is
* `false`.
*
* @tags allow-read, allow-write
* @category File System
*/
export function writeTextFile(
path: string | URL,
data: string | ReadableStream<string>,
options?: WriteFileOptions,
): Promise<void>;
/** Synchronously write string `data` to the given `path`, by default creating
* a new file if needed, else overwriting.
*
* ```ts
* Deno.writeTextFileSync("hello1.txt", "Hello world\n"); // overwrite "hello1.txt" or create it
* ```
*
* Requires `allow-write` permission, and `allow-read` if `options.create` is
* `false`.
*
* @tags allow-read, allow-write
* @category File System
*/
export function writeTextFileSync(
path: string | URL,
data: string,
options?: WriteFileOptions,
): void;
/** Truncates (or extends) the specified file, to reach the specified `len`.
* If `len` is not specified then the entire file contents are truncated.
*
* ### Truncate the entire file
* ```ts
* await Deno.truncate("my_file.txt");
* ```
*
* ### Truncate part of the file
*
* ```ts
* const file = await Deno.makeTempFile();
* await Deno.writeTextFile(file, "Hello World");
* await Deno.truncate(file, 7);
* const data = await Deno.readFile(file);
* console.log(new TextDecoder().decode(data)); // "Hello W"
* ```
*
* Requires `allow-write` permission.
*
* @tags allow-write
* @category File System
*/
export function truncate(name: string, len?: number): Promise<void>;
/** Synchronously truncates (or extends) the specified file, to reach the
* specified `len`. If `len` is not specified then the entire file contents
* are truncated.
*
* ### Truncate the entire file
*
* ```ts
* Deno.truncateSync("my_file.txt");
* ```
*
* ### Truncate part of the file
*
* ```ts
* const file = Deno.makeTempFileSync();
* Deno.writeFileSync(file, new TextEncoder().encode("Hello World"));
* Deno.truncateSync(file, 7);
* const data = Deno.readFileSync(file);
* console.log(new TextDecoder().decode(data));
* ```
*
* Requires `allow-write` permission.
*
* @tags allow-write
* @category File System
*/
export function truncateSync(name: string, len?: number): void;
/** @category Runtime
*
* @deprecated This will be removed in Deno 2.0.
*/
export interface OpMetrics {
opsDispatched: number;
opsDispatchedSync: number;
opsDispatchedAsync: number;
opsDispatchedAsyncUnref: number;
opsCompleted: number;
opsCompletedSync: number;
opsCompletedAsync: number;
opsCompletedAsyncUnref: number;
bytesSentControl: number;
bytesSentData: number;
bytesReceived: number;
}
/** @category Runtime
*
* @deprecated This will be removed in Deno 2.0.
*/
export interface Metrics extends OpMetrics {
ops: Record<string, OpMetrics>;
}
/** Receive metrics from the privileged side of Deno. This is primarily used
* in the development of Deno. _Ops_, also called _bindings_, are the
* go-between between Deno JavaScript sandbox and the rest of Deno.
*
* ```shell
* > console.table(Deno.metrics())
*
* (index) Values
*
* opsDispatched 3
* opsDispatchedSync 2
* opsDispatchedAsync 1
* opsDispatchedAsyncUnref 0
* opsCompleted 3
* opsCompletedSync 2
* opsCompletedAsync 1
* opsCompletedAsyncUnref 0
* bytesSentControl 73
* bytesSentData 0
* bytesReceived 375
*
* ```
*
* @category Runtime
*
* @deprecated This will be removed in Deno 2.0.
*/
export function metrics(): Metrics;
/**
* A map of open resources that Deno is tracking. The key is the resource ID
* (_rid_) and the value is its representation.
*
* @deprecated This will be removed in Deno 2.0.
*
* @category Runtime */
export interface ResourceMap {
[rid: number]: unknown;
}
/** Returns a map of open resource IDs (_rid_) along with their string
* representations. This is an internal API and as such resource
* representation has `unknown` type; that means it can change any time and
* should not be depended upon.
*
* ```ts
* console.log(Deno.resources());
* // { 0: "stdin", 1: "stdout", 2: "stderr" }
* Deno.openSync('../test.file');
* console.log(Deno.resources());
* // { 0: "stdin", 1: "stdout", 2: "stderr", 3: "fsFile" }
* ```
*
* @deprecated This will be removed in Deno 2.0.
*
* @category Runtime
*/
export function resources(): ResourceMap;
/**
* Additional information for FsEvent objects with the "other" kind.
*
* - `"rescan"`: rescan notices indicate either a lapse in the events or a
* change in the filesystem such that events received so far can no longer
* be relied on to represent the state of the filesystem now. An
* application that simply reacts to file changes may not care about this.
* An application that keeps an in-memory representation of the filesystem
* will need to care, and will need to refresh that representation directly
* from the filesystem.
*
* @category File System
*/
export type FsEventFlag = "rescan";
/**
* Represents a unique file system event yielded by a
* {@linkcode Deno.FsWatcher}.
*
* @category File System */
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export interface FsEvent {
/** The kind/type of the file system event. */
kind: "any" | "access" | "create" | "modify" | "remove" | "other";
/** An array of paths that are associated with the file system event. */
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paths: string[];
/** Any additional flags associated with the event. */
flag?: FsEventFlag;
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}
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/**
* Returned by {@linkcode Deno.watchFs}. It is an async iterator yielding up
* system events. To stop watching the file system by calling `.close()`
* method.
*
* @category File System
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*/
export interface FsWatcher extends AsyncIterable<FsEvent>, Disposable {
/**
* The resource id.
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*/
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readonly rid: number;
/** Stops watching the file system and closes the watcher resource. */
close(): void;
/**
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* Stops watching the file system and closes the watcher resource.
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
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*/
return?(value?: any): Promise<IteratorResult<FsEvent>>;
[Symbol.asyncIterator](): AsyncIterableIterator<FsEvent>;
}
/** Watch for file system events against one or more `paths`, which can be
* files or directories. These paths must exist already. One user action (e.g.
* `touch test.file`) can generate multiple file system events. Likewise,
* one user action can result in multiple file paths in one event (e.g. `mv
* old_name.txt new_name.txt`).
*
* The recursive option is `true` by default and, for directories, will watch
* the specified directory and all sub directories.
*
* Note that the exact ordering of the events can vary between operating
* systems.
*
* ```ts
* const watcher = Deno.watchFs("/");
* for await (const event of watcher) {
* console.log(">>>> event", event);
* // { kind: "create", paths: [ "/foo.txt" ] }
* }
* ```
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*
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* Call `watcher.close()` to stop watching.
*
* ```ts
* const watcher = Deno.watchFs("/");
*
* setTimeout(() => {
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* watcher.close();
* }, 5000);
*
* for await (const event of watcher) {
* console.log(">>>> event", event);
* }
* ```
*
* Requires `allow-read` permission.
*
* @tags allow-read
* @category File System
*/
export function watchFs(
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paths: string | string[],
options?: { recursive: boolean },
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): FsWatcher;
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/**
* Options which can be used with {@linkcode Deno.run}.
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category Sub Process */
export interface RunOptions {
/** Arguments to pass.
*
* _Note_: the first element needs to be a path to the executable that is
* being run. */
cmd: readonly string[] | [string | URL, ...string[]];
/** The current working directory that should be used when running the
* sub-process. */
cwd?: string;
/** Any environment variables to be set when running the sub-process. */
env?: Record<string, string>;
/** By default subprocess inherits `stdout` of parent process. To change
* this this option can be set to a resource ID (_rid_) of an open file,
* `"inherit"`, `"piped"`, or `"null"`:
*
* - _number_: the resource ID of an open file/resource. This allows you to
* write to a file.
* - `"inherit"`: The default if unspecified. The subprocess inherits from the
* parent.
* - `"piped"`: A new pipe should be arranged to connect the parent and child
* sub-process.
* - `"null"`: This stream will be ignored. This is the equivalent of attaching
* the stream to `/dev/null`.
*/
stdout?: "inherit" | "piped" | "null" | number;
/** By default subprocess inherits `stderr` of parent process. To change
* this this option can be set to a resource ID (_rid_) of an open file,
* `"inherit"`, `"piped"`, or `"null"`:
*
* - _number_: the resource ID of an open file/resource. This allows you to
* write to a file.
* - `"inherit"`: The default if unspecified. The subprocess inherits from the
* parent.
* - `"piped"`: A new pipe should be arranged to connect the parent and child
* sub-process.
* - `"null"`: This stream will be ignored. This is the equivalent of attaching
* the stream to `/dev/null`.
*/
stderr?: "inherit" | "piped" | "null" | number;
/** By default subprocess inherits `stdin` of parent process. To change
* this this option can be set to a resource ID (_rid_) of an open file,
* `"inherit"`, `"piped"`, or `"null"`:
*
* - _number_: the resource ID of an open file/resource. This allows you to
* read from a file.
* - `"inherit"`: The default if unspecified. The subprocess inherits from the
* parent.
* - `"piped"`: A new pipe should be arranged to connect the parent and child
* sub-process.
* - `"null"`: This stream will be ignored. This is the equivalent of attaching
* the stream to `/dev/null`.
*/
stdin?: "inherit" | "piped" | "null" | number;
}
/**
* The status resolved from the `.status()` method of a
* {@linkcode Deno.Process} instance.
*
* If `success` is `true`, then `code` will be `0`, but if `success` is
* `false`, the sub-process exit code will be set in `code`.
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category Sub Process */
export type ProcessStatus =
| {
success: true;
code: 0;
signal?: undefined;
}
| {
success: false;
code: number;
signal?: number;
};
/**
* Represents an instance of a sub process that is returned from
* {@linkcode Deno.run} which can be used to manage the sub-process.
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category Sub Process */
export class Process<T extends RunOptions = RunOptions> {
/** The resource ID of the sub-process. */
readonly rid: number;
/** The operating system's process ID for the sub-process. */
readonly pid: number;
/** A reference to the sub-processes `stdin`, which allows interacting with
* the sub-process at a low level. */
readonly stdin: T["stdin"] extends "piped" ? Writer & Closer & {
writable: WritableStream<Uint8Array>;
}
: (Writer & Closer & { writable: WritableStream<Uint8Array> }) | null;
/** A reference to the sub-processes `stdout`, which allows interacting with
* the sub-process at a low level. */
readonly stdout: T["stdout"] extends "piped" ? Reader & Closer & {
readable: ReadableStream<Uint8Array>;
}
: (Reader & Closer & { readable: ReadableStream<Uint8Array> }) | null;
/** A reference to the sub-processes `stderr`, which allows interacting with
* the sub-process at a low level. */
readonly stderr: T["stderr"] extends "piped" ? Reader & Closer & {
readable: ReadableStream<Uint8Array>;
}
: (Reader & Closer & { readable: ReadableStream<Uint8Array> }) | null;
/** Wait for the process to exit and return its exit status.
*
* Calling this function multiple times will return the same status.
*
* The `stdin` reference to the process will be closed before waiting to
* avoid a deadlock.
*
* If `stdout` and/or `stderr` were set to `"piped"`, they must be closed
* manually before the process can exit.
*
* To run process to completion and collect output from both `stdout` and
* `stderr` use:
*
* ```ts
* const p = Deno.run({ cmd: [ "echo", "hello world" ], stderr: 'piped', stdout: 'piped' });
* const [status, stdout, stderr] = await Promise.all([
* p.status(),
* p.output(),
* p.stderrOutput()
* ]);
* p.close();
* ```
*/
status(): Promise<ProcessStatus>;
/** Buffer the stdout until EOF and return it as `Uint8Array`.
*
* You must set `stdout` to `"piped"` when creating the process.
*
* This calls `close()` on stdout after its done. */
output(): Promise<Uint8Array>;
/** Buffer the stderr until EOF and return it as `Uint8Array`.
*
* You must set `stderr` to `"piped"` when creating the process.
*
* This calls `close()` on stderr after its done. */
stderrOutput(): Promise<Uint8Array>;
/** Clean up resources associated with the sub-process instance. */
close(): void;
/** Send a signal to process.
* Default signal is `"SIGTERM"`.
*
* ```ts
* const p = Deno.run({ cmd: [ "sleep", "20" ]});
* p.kill("SIGTERM");
* p.close();
* ```
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*/
kill(signo?: Signal): void;
}
/** Operating signals which can be listened for or sent to sub-processes. What
* signals and what their standard behaviors are OS dependent.
*
* @category Runtime */
export type Signal =
| "SIGABRT"
| "SIGALRM"
| "SIGBREAK"
| "SIGBUS"
| "SIGCHLD"
| "SIGCONT"
| "SIGEMT"
| "SIGFPE"
| "SIGHUP"
| "SIGILL"
| "SIGINFO"
| "SIGINT"
| "SIGIO"
| "SIGKILL"
| "SIGPIPE"
| "SIGPROF"
| "SIGPWR"
| "SIGQUIT"
| "SIGSEGV"
| "SIGSTKFLT"
| "SIGSTOP"
| "SIGSYS"
| "SIGTERM"
| "SIGTRAP"
| "SIGTSTP"
| "SIGTTIN"
| "SIGTTOU"
| "SIGURG"
| "SIGUSR1"
| "SIGUSR2"
| "SIGVTALRM"
| "SIGWINCH"
| "SIGXCPU"
| "SIGXFSZ";
/** Registers the given function as a listener of the given signal event.
*
* ```ts
* Deno.addSignalListener(
* "SIGTERM",
* () => {
* console.log("SIGTERM!")
* }
* );
* ```
*
* _Note_: On Windows only `"SIGINT"` (CTRL+C) and `"SIGBREAK"` (CTRL+Break)
* are supported.
*
* @category Runtime
*/
export function addSignalListener(signal: Signal, handler: () => void): void;
/** Removes the given signal listener that has been registered with
* {@linkcode Deno.addSignalListener}.
*
* ```ts
* const listener = () => {
* console.log("SIGTERM!")
* };
* Deno.addSignalListener("SIGTERM", listener);
* Deno.removeSignalListener("SIGTERM", listener);
* ```
*
* _Note_: On Windows only `"SIGINT"` (CTRL+C) and `"SIGBREAK"` (CTRL+Break)
* are supported.
*
* @category Runtime
*/
export function removeSignalListener(
signal: Signal,
handler: () => void,
): void;
/**
* Spawns new subprocess. RunOptions must contain at a minimum the `opt.cmd`,
* an array of program arguments, the first of which is the binary.
*
* ```ts
* const p = Deno.run({
* cmd: ["curl", "https://example.com"],
* });
* const status = await p.status();
* ```
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*
* Subprocess uses same working directory as parent process unless `opt.cwd`
* is specified.
*
* Environmental variables from parent process can be cleared using `opt.clearEnv`.
* Doesn't guarantee that only `opt.env` variables are present,
* as the OS may set environmental variables for processes.
*
* Environmental variables for subprocess can be specified using `opt.env`
* mapping.
*
* `opt.uid` sets the child processs user ID. This translates to a setuid call
* in the child process. Failure in the setuid call will cause the spawn to fail.
*
* `opt.gid` is similar to `opt.uid`, but sets the group ID of the child process.
* This has the same semantics as the uid field.
*
* By default subprocess inherits stdio of parent process. To change
* this this, `opt.stdin`, `opt.stdout`, and `opt.stderr` can be set
* independently to a resource ID (_rid_) of an open file, `"inherit"`,
* `"piped"`, or `"null"`:
*
* - _number_: the resource ID of an open file/resource. This allows you to
* read or write to a file.
* - `"inherit"`: The default if unspecified. The subprocess inherits from the
* parent.
* - `"piped"`: A new pipe should be arranged to connect the parent and child
* sub-process.
* - `"null"`: This stream will be ignored. This is the equivalent of attaching
* the stream to `/dev/null`.
*
* Details of the spawned process are returned as an instance of
* {@linkcode Deno.Process}.
*
* Requires `allow-run` permission.
*
* @deprecated This will be soft-removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @tags allow-run
* @category Sub Process
*/
export function run<T extends RunOptions = RunOptions>(opt: T): Process<T>;
/** Create a child process.
*
* If any stdio options are not set to `"piped"`, accessing the corresponding
* field on the `Command` or its `CommandOutput` will throw a `TypeError`.
*
* If `stdin` is set to `"piped"`, the `stdin` {@linkcode WritableStream}
* needs to be closed manually.
*
* @example Spawn a subprocess and pipe the output to a file
*
* ```ts
* const command = new Deno.Command(Deno.execPath(), {
* args: [
* "eval",
* "console.log('Hello World')",
* ],
* stdin: "piped",
* stdout: "piped",
* });
* const child = command.spawn();
*
* // open a file and pipe the subprocess output to it.
* child.stdout.pipeTo(
* Deno.openSync("output", { write: true, create: true }).writable,
* );
*
* // manually close stdin
* child.stdin.close();
* const status = await child.status;
* ```
*
* @example Spawn a subprocess and collect its output
*
* ```ts
* const command = new Deno.Command(Deno.execPath(), {
* args: [
* "eval",
* "console.log('hello'); console.error('world')",
* ],
* });
* const { code, stdout, stderr } = await command.output();
* console.assert(code === 0);
* console.assert("hello\n" === new TextDecoder().decode(stdout));
* console.assert("world\n" === new TextDecoder().decode(stderr));
* ```
*
* @example Spawn a subprocess and collect its output synchronously
*
* ```ts
* const command = new Deno.Command(Deno.execPath(), {
* args: [
* "eval",
* "console.log('hello'); console.error('world')",
* ],
* });
* const { code, stdout, stderr } = command.outputSync();
* console.assert(code === 0);
* console.assert("hello\n" === new TextDecoder().decode(stdout));
* console.assert("world\n" === new TextDecoder().decode(stderr));
* ```
*
* @tags allow-run
* @category Sub Process
*/
export class Command {
constructor(command: string | URL, options?: CommandOptions);
/**
* Executes the {@linkcode Deno.Command}, waiting for it to finish and
* collecting all of its output.
* If `spawn()` was called, calling this function will collect the remaining
* output.
*
* Will throw an error if `stdin: "piped"` is set.
*
* If options `stdout` or `stderr` are not set to `"piped"`, accessing the
* corresponding field on {@linkcode Deno.CommandOutput} will throw a `TypeError`.
*/
output(): Promise<CommandOutput>;
/**
* Synchronously executes the {@linkcode Deno.Command}, waiting for it to
* finish and collecting all of its output.
*
* Will throw an error if `stdin: "piped"` is set.
*
* If options `stdout` or `stderr` are not set to `"piped"`, accessing the
* corresponding field on {@linkcode Deno.CommandOutput} will throw a `TypeError`.
*/
outputSync(): CommandOutput;
/**
* Spawns a streamable subprocess, allowing to use the other methods.
*/
spawn(): ChildProcess;
}
/**
* The interface for handling a child process returned from
* {@linkcode Deno.Command.spawn}.
*
* @category Sub Process
*/
export class ChildProcess implements AsyncDisposable {
get stdin(): WritableStream<Uint8Array>;
get stdout(): ReadableStream<Uint8Array>;
get stderr(): ReadableStream<Uint8Array>;
readonly pid: number;
/** Get the status of the child. */
readonly status: Promise<CommandStatus>;
/** Waits for the child to exit completely, returning all its output and
* status. */
output(): Promise<CommandOutput>;
/** Kills the process with given {@linkcode Deno.Signal}.
*
* Defaults to `SIGTERM` if no signal is provided.
*
* @param [signo="SIGTERM"]
*/
kill(signo?: Signal): void;
/** Ensure that the status of the child process prevents the Deno process
* from exiting. */
ref(): void;
/** Ensure that the status of the child process does not block the Deno
* process from exiting. */
unref(): void;
[Symbol.asyncDispose](): Promise<void>;
}
/**
* Options which can be set when calling {@linkcode Deno.Command}.
*
* @category Sub Process
*/
export interface CommandOptions {
/** Arguments to pass to the process. */
args?: string[];
/**
* The working directory of the process.
*
* If not specified, the `cwd` of the parent process is used.
*/
cwd?: string | URL;
/**
* Clear environmental variables from parent process.
*
* Doesn't guarantee that only `env` variables are present, as the OS may
* set environmental variables for processes.
*
* @default {false}
*/
clearEnv?: boolean;
/** Environmental variables to pass to the subprocess. */
env?: Record<string, string>;
/**
* Sets the child processs user ID. This translates to a setuid call in the
* child process. Failure in the set uid call will cause the spawn to fail.
*/
uid?: number;
/** Similar to `uid`, but sets the group ID of the child process. */
gid?: number;
/**
* An {@linkcode AbortSignal} that allows closing the process using the
* corresponding {@linkcode AbortController} by sending the process a
* SIGTERM signal.
*
* Not supported in {@linkcode Deno.Command.outputSync}.
*/
signal?: AbortSignal;
/** How `stdin` of the spawned process should be handled.
*
* Defaults to `"inherit"` for `output` & `outputSync`,
* and `"inherit"` for `spawn`. */
stdin?: "piped" | "inherit" | "null";
/** How `stdout` of the spawned process should be handled.
*
* Defaults to `"piped"` for `output` & `outputSync`,
* and `"inherit"` for `spawn`. */
stdout?: "piped" | "inherit" | "null";
/** How `stderr` of the spawned process should be handled.
*
* Defaults to `"piped"` for `output` & `outputSync`,
* and `"inherit"` for `spawn`. */
stderr?: "piped" | "inherit" | "null";
/** Skips quoting and escaping of the arguments on windows. This option
* is ignored on non-windows platforms.
*
* @default {false} */
windowsRawArguments?: boolean;
}
/**
* @category Sub Process
*/
export interface CommandStatus {
/** If the child process exits with a 0 status code, `success` will be set
* to `true`, otherwise `false`. */
success: boolean;
/** The exit code of the child process. */
code: number;
/** The signal associated with the child process. */
signal: Signal | null;
}
/**
* The interface returned from calling {@linkcode Deno.Command.output} or
* {@linkcode Deno.Command.outputSync} which represents the result of spawning the
* child process.
*
* @category Sub Process
*/
export interface CommandOutput extends CommandStatus {
/** The buffered output from the child process' `stdout`. */
readonly stdout: Uint8Array;
/** The buffered output from the child process' `stderr`. */
readonly stderr: Uint8Array;
}
/** Option which can be specified when performing {@linkcode Deno.inspect}.
*
* @category I/O */
export interface InspectOptions {
/** Stylize output with ANSI colors.
*
* @default {false} */
colors?: boolean;
/** Try to fit more than one entry of a collection on the same line.
*
* @default {true} */
compact?: boolean;
/** Traversal depth for nested objects.
*
* @default {4} */
depth?: number;
/** The maximum length for an inspection to take up a single line.
*
* @default {80} */
breakLength?: number;
/** Whether or not to escape sequences.
*
* @default {true} */
escapeSequences?: boolean;
/** The maximum number of iterable entries to print.
*
* @default {100} */
iterableLimit?: number;
/** Show a Proxy's target and handler.
*
* @default {false} */
showProxy?: boolean;
/** Sort Object, Set and Map entries by key.
*
* @default {false} */
sorted?: boolean;
/** Add a trailing comma for multiline collections.
*
* @default {false} */
trailingComma?: boolean;
/** Evaluate the result of calling getters.
*
* @default {false} */
getters?: boolean;
/** Show an object's non-enumerable properties.
*
* @default {false} */
showHidden?: boolean;
/** The maximum length of a string before it is truncated with an
* ellipsis. */
strAbbreviateSize?: number;
}
/** Converts the input into a string that has the same format as printed by
* `console.log()`.
*
* ```ts
* const obj = {
* a: 10,
* b: "hello",
* };
* const objAsString = Deno.inspect(obj); // { a: 10, b: "hello" }
* console.log(obj); // prints same value as objAsString, e.g. { a: 10, b: "hello" }
* ```
*
* A custom inspect functions can be registered on objects, via the symbol
* `Symbol.for("Deno.customInspect")`, to control and customize the output
* of `inspect()` or when using `console` logging:
*
* ```ts
* class A {
* x = 10;
* y = "hello";
* [Symbol.for("Deno.customInspect")]() {
* return `x=${this.x}, y=${this.y}`;
* }
* }
*
* const inStringFormat = Deno.inspect(new A()); // "x=10, y=hello"
* console.log(inStringFormat); // prints "x=10, y=hello"
* ```
*
* A depth can be specified by using the `depth` option:
*
* ```ts
* Deno.inspect({a: {b: {c: {d: 'hello'}}}}, {depth: 2}); // { a: { b: [Object] } }
* ```
*
* @category I/O
*/
export function inspect(value: unknown, options?: InspectOptions): string;
/** The name of a privileged feature which needs permission.
*
* @category Permissions
*/
export type PermissionName =
| "run"
| "read"
| "write"
| "net"
| "env"
| "sys"
| "ffi"
| "hrtime";
/** The current status of the permission:
*
* - `"granted"` - the permission has been granted.
* - `"denied"` - the permission has been explicitly denied.
* - `"prompt"` - the permission has not explicitly granted nor denied.
*
* @category Permissions
*/
export type PermissionState =
| "granted"
| "denied"
| "prompt";
/** The permission descriptor for the `allow-run` and `deny-run` permissions, which controls
* access to what sub-processes can be executed by Deno. The option `command`
* allows scoping the permission to a specific executable.
*
* **Warning, in practice, `allow-run` is effectively the same as `allow-all`
* in the sense that malicious code could execute any arbitrary code on the
* host.**
*
* @category Permissions */
export interface RunPermissionDescriptor {
name: "run";
/** An `allow-run` or `deny-run` permission can be scoped to a specific executable,
* which would be relative to the start-up CWD of the Deno CLI. */
command?: string | URL;
}
/** The permission descriptor for the `allow-read` and `deny-read` permissions, which controls
* access to reading resources from the local host. The option `path` allows
* scoping the permission to a specific path (and if the path is a directory
* any sub paths).
*
* Permission granted under `allow-read` only allows runtime code to attempt
* to read, the underlying operating system may apply additional permissions.
*
* @category Permissions */
export interface ReadPermissionDescriptor {
name: "read";
/** An `allow-read` or `deny-read` permission can be scoped to a specific path (and if
* the path is a directory, any sub paths). */
path?: string | URL;
}
/** The permission descriptor for the `allow-write` and `deny-write` permissions, which
* controls access to writing to resources from the local host. The option
* `path` allow scoping the permission to a specific path (and if the path is
* a directory any sub paths).
*
* Permission granted under `allow-write` only allows runtime code to attempt
* to write, the underlying operating system may apply additional permissions.
*
* @category Permissions */
export interface WritePermissionDescriptor {
name: "write";
/** An `allow-write` or `deny-write` permission can be scoped to a specific path (and if
* the path is a directory, any sub paths). */
path?: string | URL;
}
/** The permission descriptor for the `allow-net` and `deny-net` permissions, which controls
* access to opening network ports and connecting to remote hosts via the
* network. The option `host` allows scoping the permission for outbound
* connection to a specific host and port.
*
* @category Permissions */
export interface NetPermissionDescriptor {
name: "net";
/** Optional host string of the form `"<hostname>[:<port>]"`. Examples:
*
* "github.com"
* "deno.land:8080"
*/
host?: string;
}
/** The permission descriptor for the `allow-env` and `deny-env` permissions, which controls
* access to being able to read and write to the process environment variables
* as well as access other information about the environment. The option
* `variable` allows scoping the permission to a specific environment
* variable.
*
* @category Permissions */
export interface EnvPermissionDescriptor {
name: "env";
/** Optional environment variable name (e.g. `PATH`). */
variable?: string;
}
/** The permission descriptor for the `allow-sys` and `deny-sys` permissions, which controls
* access to sensitive host system information, which malicious code might
* attempt to exploit. The option `kind` allows scoping the permission to a
* specific piece of information.
*
* @category Permissions */
export interface SysPermissionDescriptor {
name: "sys";
/** The specific information to scope the permission to. */
kind?:
| "loadavg"
| "hostname"
| "systemMemoryInfo"
| "networkInterfaces"
| "osRelease"
| "osUptime"
| "uid"
| "gid"
| "cpus";
}
/** The permission descriptor for the `allow-ffi` and `deny-ffi` permissions, which controls
* access to loading _foreign_ code and interfacing with it via the
* [Foreign Function Interface API](https://deno.land/manual/runtime/ffi_api)
* available in Deno. The option `path` allows scoping the permission to a
* specific path on the host.
*
* @category Permissions */
export interface FfiPermissionDescriptor {
name: "ffi";
/** Optional path on the local host to scope the permission to. */
path?: string | URL;
}
/** The permission descriptor for the `allow-hrtime` and `deny-hrtime` permissions, which
* controls if the runtime code has access to high resolution time. High
* resolution time is considered sensitive information, because it can be used
* by malicious code to gain information about the host that it might not
* otherwise have access to.
*
* @category Permissions */
export interface HrtimePermissionDescriptor {
name: "hrtime";
}
/** Permission descriptors which define a permission and can be queried,
* requested, or revoked.
*
* View the specifics of the individual descriptors for more information about
* each permission kind.
*
* @category Permissions
*/
export type PermissionDescriptor =
| RunPermissionDescriptor
| ReadPermissionDescriptor
| WritePermissionDescriptor
| NetPermissionDescriptor
| EnvPermissionDescriptor
| SysPermissionDescriptor
| FfiPermissionDescriptor
| HrtimePermissionDescriptor;
/** The interface which defines what event types are supported by
* {@linkcode PermissionStatus} instances.
*
* @category Permissions */
export interface PermissionStatusEventMap {
"change": Event;
}
/** An {@linkcode EventTarget} returned from the {@linkcode Deno.permissions}
* API which can provide updates to any state changes of the permission.
*
* @category Permissions */
export class PermissionStatus extends EventTarget {
// deno-lint-ignore no-explicit-any
onchange: ((this: PermissionStatus, ev: Event) => any) | null;
readonly state: PermissionState;
/**
* Describes if permission is only granted partially, eg. an access
* might be granted to "/foo" directory, but denied for "/foo/bar".
* In such case this field will be set to `true` when querying for
* read permissions of "/foo" directory.
*/
readonly partial: boolean;
addEventListener<K extends keyof PermissionStatusEventMap>(
type: K,
listener: (
this: PermissionStatus,
ev: PermissionStatusEventMap[K],
) => any,
options?: boolean | AddEventListenerOptions,
): void;
addEventListener(
type: string,
listener: EventListenerOrEventListenerObject,
options?: boolean | AddEventListenerOptions,
): void;
removeEventListener<K extends keyof PermissionStatusEventMap>(
type: K,
listener: (
this: PermissionStatus,
ev: PermissionStatusEventMap[K],
) => any,
options?: boolean | EventListenerOptions,
): void;
removeEventListener(
type: string,
listener: EventListenerOrEventListenerObject,
options?: boolean | EventListenerOptions,
): void;
}
/**
* Deno's permission management API.
*
* The class which provides the interface for the {@linkcode Deno.permissions}
* global instance and is based on the web platform
* [Permissions API](https://developer.mozilla.org/en-US/docs/Web/API/Permissions_API),
* though some proposed parts of the API which are useful in a server side
* runtime context were removed or abandoned in the web platform specification
* which is why it was chosen to locate it in the {@linkcode Deno} namespace
* instead.
*
* By default, if the `stdin`/`stdout` is TTY for the Deno CLI (meaning it can
* send and receive text), then the CLI will prompt the user to grant
* permission when an un-granted permission is requested. This behavior can
* be changed by using the `--no-prompt` command at startup. When prompting
* the CLI will request the narrowest permission possible, potentially making
* it annoying to the user. The permissions APIs allow the code author to
* request a wider set of permissions at one time in order to provide a better
* user experience.
*
* @category Permissions */
export class Permissions {
/** Resolves to the current status of a permission.
*
* Note, if the permission is already granted, `request()` will not prompt
* the user again, therefore `query()` is only necessary if you are going
* to react differently existing permissions without wanting to modify them
* or prompt the user to modify them.
*
* ```ts
* const status = await Deno.permissions.query({ name: "read", path: "/etc" });
* console.log(status.state);
* ```
*/
query(desc: PermissionDescriptor): Promise<PermissionStatus>;
/** Returns the current status of a permission.
*
* Note, if the permission is already granted, `request()` will not prompt
* the user again, therefore `querySync()` is only necessary if you are going
* to react differently existing permissions without wanting to modify them
* or prompt the user to modify them.
*
* ```ts
* const status = Deno.permissions.querySync({ name: "read", path: "/etc" });
* console.log(status.state);
* ```
*/
querySync(desc: PermissionDescriptor): PermissionStatus;
/** Revokes a permission, and resolves to the state of the permission.
*
* ```ts
* import { assert } from "jsr:@std/assert";
*
* const status = await Deno.permissions.revoke({ name: "run" });
* assert(status.state !== "granted")
* ```
*/
revoke(desc: PermissionDescriptor): Promise<PermissionStatus>;
/** Revokes a permission, and returns the state of the permission.
*
* ```ts
* import { assert } from "jsr:@std/assert";
*
* const status = Deno.permissions.revokeSync({ name: "run" });
* assert(status.state !== "granted")
* ```
*/
revokeSync(desc: PermissionDescriptor): PermissionStatus;
/** Requests the permission, and resolves to the state of the permission.
*
* If the permission is already granted, the user will not be prompted to
* grant the permission again.
*
* ```ts
* const status = await Deno.permissions.request({ name: "env" });
* if (status.state === "granted") {
* console.log("'env' permission is granted.");
* } else {
* console.log("'env' permission is denied.");
* }
* ```
*/
request(desc: PermissionDescriptor): Promise<PermissionStatus>;
/** Requests the permission, and returns the state of the permission.
*
* If the permission is already granted, the user will not be prompted to
* grant the permission again.
*
* ```ts
* const status = Deno.permissions.requestSync({ name: "env" });
* if (status.state === "granted") {
* console.log("'env' permission is granted.");
* } else {
* console.log("'env' permission is denied.");
* }
* ```
*/
requestSync(desc: PermissionDescriptor): PermissionStatus;
}
/** Deno's permission management API.
*
* It is a singleton instance of the {@linkcode Permissions} object and is
* based on the web platform
* [Permissions API](https://developer.mozilla.org/en-US/docs/Web/API/Permissions_API),
* though some proposed parts of the API which are useful in a server side
* runtime context were removed or abandoned in the web platform specification
* which is why it was chosen to locate it in the {@linkcode Deno} namespace
* instead.
*
* By default, if the `stdin`/`stdout` is TTY for the Deno CLI (meaning it can
* send and receive text), then the CLI will prompt the user to grant
* permission when an un-granted permission is requested. This behavior can
* be changed by using the `--no-prompt` command at startup. When prompting
* the CLI will request the narrowest permission possible, potentially making
* it annoying to the user. The permissions APIs allow the code author to
* request a wider set of permissions at one time in order to provide a better
* user experience.
*
* Requesting already granted permissions will not prompt the user and will
* return that the permission was granted.
*
* ### Querying
*
* ```ts
* const status = await Deno.permissions.query({ name: "read", path: "/etc" });
* console.log(status.state);
* ```
2023-02-12 17:14:33 -05:00
*
* ```ts
* const status = Deno.permissions.querySync({ name: "read", path: "/etc" });
* console.log(status.state);
* ```
*
* ### Revoking
*
* ```ts
* import { assert } from "jsr:@std/assert";
*
* const status = await Deno.permissions.revoke({ name: "run" });
* assert(status.state !== "granted")
* ```
2023-02-12 17:14:33 -05:00
*
* ```ts
* import { assert } from "jsr:@std/assert";
*
* const status = Deno.permissions.revokeSync({ name: "run" });
* assert(status.state !== "granted")
* ```
*
* ### Requesting
*
* ```ts
* const status = await Deno.permissions.request({ name: "env" });
* if (status.state === "granted") {
* console.log("'env' permission is granted.");
* } else {
* console.log("'env' permission is denied.");
* }
* ```
2023-02-12 17:14:33 -05:00
*
* ```ts
* const status = Deno.permissions.requestSync({ name: "env" });
* if (status.state === "granted") {
* console.log("'env' permission is granted.");
* } else {
* console.log("'env' permission is denied.");
* }
* ```
*
* @category Permissions
*/
export const permissions: Permissions;
/** Information related to the build of the current Deno runtime.
*
* Users are discouraged from code branching based on this information, as
* assumptions about what is available in what build environment might change
* over time. Developers should specifically sniff out the features they
* intend to use.
*
* The intended use for the information is for logging and debugging purposes.
*
* @category Runtime
*/
export const build: {
/** The [LLVM](https://llvm.org/) target triple, which is the combination
* of `${arch}-${vendor}-${os}` and represent the specific build target that
* the current runtime was built for. */
target: string;
/** Instruction set architecture that the Deno CLI was built for. */
arch: "x86_64" | "aarch64";
/** The operating system that the Deno CLI was built for. `"darwin"` is
* also known as OSX or MacOS. */
os:
| "darwin"
| "linux"
| "android"
| "windows"
| "freebsd"
| "netbsd"
| "aix"
| "solaris"
| "illumos";
/** The computer vendor that the Deno CLI was built for. */
vendor: string;
/** Optional environment flags that were set for this build of Deno CLI. */
env?: string;
};
/** Version information related to the current Deno CLI runtime environment.
*
* Users are discouraged from code branching based on this information, as
* assumptions about what is available in what build environment might change
* over time. Developers should specifically sniff out the features they
* intend to use.
*
* The intended use for the information is for logging and debugging purposes.
*
* @category Runtime
*/
export const version: {
/** Deno CLI's version. For example: `"1.26.0"`. */
deno: string;
/** The V8 version used by Deno. For example: `"10.7.100.0"`.
*
* V8 is the underlying JavaScript runtime platform that Deno is built on
* top of. */
v8: string;
/** The TypeScript version used by Deno. For example: `"4.8.3"`.
*
* A version of the TypeScript type checker and language server is built-in
* to the Deno CLI. */
typescript: string;
};
/** Returns the script arguments to the program.
*
* Give the following command line invocation of Deno:
*
* ```sh
* deno run --allow-read https://examples.deno.land/command-line-arguments.ts Sushi
* ```
*
* Then `Deno.args` will contain:
*
* ```ts
* [ "Sushi" ]
* ```
*
* If you are looking for a structured way to parse arguments, there is
* [`parseArgs()`](https://jsr.io/@std/cli/doc/parse-args/~/parseArgs) from
* the Deno Standard Library.
*
* @category Runtime
*/
export const args: string[];
/**
* A symbol which can be used as a key for a custom method which will be
* called when `Deno.inspect()` is called, or when the object is logged to
* the console.
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category I/O
*/
export const customInspect: unique symbol;
/** The URL of the entrypoint module entered from the command-line. It
* requires read permission to the CWD.
*
* Also see {@linkcode ImportMeta} for other related information.
*
* @tags allow-read
* @category Runtime
*/
export const mainModule: string;
/** Options that can be used with {@linkcode symlink} and
* {@linkcode symlinkSync}.
*
* @category File System */
export interface SymlinkOptions {
/** Specify the symbolic link type as file, directory or NTFS junction. This
* option only applies to Windows and is ignored on other operating systems. */
type: "file" | "dir" | "junction";
}
/**
* Creates `newpath` as a symbolic link to `oldpath`.
*
* The `options.type` parameter can be set to `"file"`, `"dir"` or `"junction"`.
* This argument is only available on Windows and ignored on other platforms.
*
* ```ts
* await Deno.symlink("old/name", "new/name");
* ```
*
* Requires full `allow-read` and `allow-write` permissions.
*
* @tags allow-read, allow-write
* @category File System
*/
export function symlink(
oldpath: string | URL,
newpath: string | URL,
options?: SymlinkOptions,
): Promise<void>;
/**
* Creates `newpath` as a symbolic link to `oldpath`.
*
* The `options.type` parameter can be set to `"file"`, `"dir"` or `"junction"`.
* This argument is only available on Windows and ignored on other platforms.
*
* ```ts
* Deno.symlinkSync("old/name", "new/name");
* ```
*
* Requires full `allow-read` and `allow-write` permissions.
*
* @tags allow-read, allow-write
* @category File System
*/
export function symlinkSync(
oldpath: string | URL,
newpath: string | URL,
options?: SymlinkOptions,
): void;
/**
* Truncates or extends the specified file stream, to reach the specified
* `len`.
*
* If `len` is not specified then the entire file contents are truncated as if
* `len` was set to `0`.
*
* If the file previously was larger than this new length, the extra data is
* lost.
*
* If the file previously was shorter, it is extended, and the extended part
* reads as null bytes ('\0').
*
* ### Truncate the entire file
*
* ```ts
* const file = await Deno.open(
* "my_file.txt",
* { read: true, write: true, create: true }
* );
* await Deno.ftruncate(file.rid);
* ```
*
* ### Truncate part of the file
*
* ```ts
* const file = await Deno.open(
* "my_file.txt",
* { read: true, write: true, create: true }
* );
* await file.write(new TextEncoder().encode("Hello World"));
* await Deno.ftruncate(file.rid, 7);
* const data = new Uint8Array(32);
* await Deno.read(file.rid, data);
* console.log(new TextDecoder().decode(data)); // Hello W
* ```
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category File System
*/
export function ftruncate(rid: number, len?: number): Promise<void>;
/**
* Synchronously truncates or extends the specified file stream, to reach the
* specified `len`.
*
* If `len` is not specified then the entire file contents are truncated as if
* `len` was set to `0`.
*
* If the file previously was larger than this new length, the extra data is
* lost.
*
* If the file previously was shorter, it is extended, and the extended part
* reads as null bytes ('\0').
*
* ### Truncate the entire file
*
* ```ts
* const file = Deno.openSync(
* "my_file.txt",
* { read: true, write: true, truncate: true, create: true }
* );
* Deno.ftruncateSync(file.rid);
* ```
*
* ### Truncate part of the file
*
* ```ts
* const file = Deno.openSync(
* "my_file.txt",
* { read: true, write: true, create: true }
* );
* file.writeSync(new TextEncoder().encode("Hello World"));
* Deno.ftruncateSync(file.rid, 7);
* Deno.seekSync(file.rid, 0, Deno.SeekMode.Start);
* const data = new Uint8Array(32);
* Deno.readSync(file.rid, data);
* console.log(new TextDecoder().decode(data)); // Hello W
* ```
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category File System
*/
export function ftruncateSync(rid: number, len?: number): void;
/**
* Synchronously changes the access (`atime`) and modification (`mtime`) times
* of a file stream resource referenced by `rid`. Given times are either in
* seconds (UNIX epoch time) or as `Date` objects.
*
* ```ts
* const file = Deno.openSync("file.txt", { create: true, write: true });
* Deno.futimeSync(file.rid, 1556495550, new Date());
* ```
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category File System
*/
export function futimeSync(
rid: number,
atime: number | Date,
mtime: number | Date,
): void;
/**
* Changes the access (`atime`) and modification (`mtime`) times of a file
* stream resource referenced by `rid`. Given times are either in seconds
* (UNIX epoch time) or as `Date` objects.
*
* ```ts
* const file = await Deno.open("file.txt", { create: true, write: true });
* await Deno.futime(file.rid, 1556495550, new Date());
* ```
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category File System
*/
export function futime(
rid: number,
atime: number | Date,
mtime: number | Date,
): Promise<void>;
/**
* Returns a `Deno.FileInfo` for the given file stream.
*
* ```ts
* import { assert } from "jsr:@std/assert";
*
* const file = await Deno.open("file.txt", { read: true });
* const fileInfo = await Deno.fstat(file.rid);
* assert(fileInfo.isFile);
* ```
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category File System
*/
export function fstat(rid: number): Promise<FileInfo>;
/**
* Synchronously returns a {@linkcode Deno.FileInfo} for the given file
* stream.
*
* ```ts
* import { assert } from "jsr:@std/assert";
*
* const file = Deno.openSync("file.txt", { read: true });
* const fileInfo = Deno.fstatSync(file.rid);
* assert(fileInfo.isFile);
* ```
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*
* @category File System
*/
export function fstatSync(rid: number): FileInfo;
/**
* Synchronously changes the access (`atime`) and modification (`mtime`) times
* of a file system object referenced by `path`. Given times are either in
* seconds (UNIX epoch time) or as `Date` objects.
*
* ```ts
* Deno.utimeSync("myfile.txt", 1556495550, new Date());
* ```
*
* Requires `allow-write` permission.
*
* @tags allow-write
* @category File System
*/
export function utimeSync(
path: string | URL,
atime: number | Date,
mtime: number | Date,
): void;
/**
* Changes the access (`atime`) and modification (`mtime`) times of a file
* system object referenced by `path`. Given times are either in seconds
* (UNIX epoch time) or as `Date` objects.
*
* ```ts
* await Deno.utime("myfile.txt", 1556495550, new Date());
* ```
*
* Requires `allow-write` permission.
*
* @tags allow-write
* @category File System
*/
export function utime(
path: string | URL,
atime: number | Date,
mtime: number | Date,
): Promise<void>;
/** The event yielded from an {@linkcode HttpConn} which represents an HTTP
* request from a remote client.
*
* @category HTTP Server
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*/
export interface RequestEvent {
/** The request from the client in the form of the web platform
* {@linkcode Request}. */
readonly request: Request;
/** The method to be used to respond to the event. The response needs to
* either be an instance of {@linkcode Response} or a promise that resolves
* with an instance of `Response`.
*
* When the response is successfully processed then the promise returned
* will be resolved. If there are any issues with sending the response,
* the promise will be rejected. */
respondWith(r: Response | PromiseLike<Response>): Promise<void>;
}
/**
* The async iterable that is returned from {@linkcode serveHttp} which
* yields up {@linkcode RequestEvent} events, representing individual
* requests on the HTTP server connection.
*
* @category HTTP Server
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*/
export interface HttpConn extends AsyncIterable<RequestEvent>, Disposable {
/** The resource ID associated with this connection. Generally users do not
* need to be aware of this identifier. */
readonly rid: number;
/** An alternative to the async iterable interface which provides promises
* which resolve with either a {@linkcode RequestEvent} when there is
* another request or `null` when the client has closed the connection. */
nextRequest(): Promise<RequestEvent | null>;
/** Initiate a server side closure of the connection, indicating to the
* client that you refuse to accept any more requests on this connection.
*
* Typically the client closes the connection, which will result in the
* async iterable terminating or the `nextRequest()` method returning
* `null`. */
close(): void;
}
/**
* Provides an interface to handle HTTP request and responses over TCP or TLS
* connections. The method returns an {@linkcode HttpConn} which yields up
* {@linkcode RequestEvent} events, which utilize the web platform standard
* {@linkcode Request} and {@linkcode Response} objects to handle the request.
*
* ```ts
* const conn = Deno.listen({ port: 80 });
* const httpConn = Deno.serveHttp(await conn.accept());
* const e = await httpConn.nextRequest();
* if (e) {
* e.respondWith(new Response("Hello World"));
* }
* ```
*
* Alternatively, you can also use the async iterator approach:
*
* ```ts
* async function handleHttp(conn: Deno.Conn) {
* for await (const e of Deno.serveHttp(conn)) {
* e.respondWith(new Response("Hello World"));
* }
* }
*
* for await (const conn of Deno.listen({ port: 80 })) {
* handleHttp(conn);
* }
* ```
*
* If `httpConn.nextRequest()` encounters an error or returns `null` then the
* underlying {@linkcode HttpConn} resource is closed automatically.
*
* Also see the experimental Flash HTTP server {@linkcode Deno.serve} which
* provides a ground up rewrite of handling of HTTP requests and responses
* within the Deno CLI.
*
* Note that this function *consumes* the given connection passed to it, thus
* the original connection will be unusable after calling this. Additionally,
* you need to ensure that the connection is not being used elsewhere when
* calling this function in order for the connection to be consumed properly.
*
* For instance, if there is a `Promise` that is waiting for read operation on
* the connection to complete, it is considered that the connection is being
* used elsewhere. In such a case, this function will fail.
*
* @category HTTP Server
* @deprecated This will be soft-removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*/
export function serveHttp(conn: Conn): HttpConn;
/** The object that is returned from a {@linkcode Deno.upgradeWebSocket}
* request.
*
* @category Web Sockets */
export interface WebSocketUpgrade {
/** The response object that represents the HTTP response to the client,
* which should be used to the {@linkcode RequestEvent} `.respondWith()` for
* the upgrade to be successful. */
response: Response;
/** The {@linkcode WebSocket} interface to communicate to the client via a
* web socket. */
socket: WebSocket;
}
/** Options which can be set when performing a
* {@linkcode Deno.upgradeWebSocket} upgrade of a {@linkcode Request}
*
* @category Web Sockets */
export interface UpgradeWebSocketOptions {
/** Sets the `.protocol` property on the client side web socket to the
* value provided here, which should be one of the strings specified in the
* `protocols` parameter when requesting the web socket. This is intended
* for clients and servers to specify sub-protocols to use to communicate to
* each other. */
protocol?: string;
/** If the client does not respond to this frame with a
* `pong` within the timeout specified, the connection is deemed
* unhealthy and is closed. The `close` and `error` event will be emitted.
*
* The unit is seconds, with a default of 120.
* Set to `0` to disable timeouts. */
idleTimeout?: number;
}
/**
* Upgrade an incoming HTTP request to a WebSocket.
*
* Given a {@linkcode Request}, returns a pair of {@linkcode WebSocket} and
* {@linkcode Response} instances. The original request must be responded to
* with the returned response for the websocket upgrade to be successful.
*
* ```ts
* const conn = Deno.listen({ port: 80 });
* const httpConn = Deno.serveHttp(await conn.accept());
* const e = await httpConn.nextRequest();
* if (e) {
* const { socket, response } = Deno.upgradeWebSocket(e.request);
* socket.onopen = () => {
* socket.send("Hello World!");
* };
* socket.onmessage = (e) => {
* console.log(e.data);
* socket.close();
* };
* socket.onclose = () => console.log("WebSocket has been closed.");
* socket.onerror = (e) => console.error("WebSocket error:", e);
* e.respondWith(response);
* }
* ```
*
* If the request body is disturbed (read from) before the upgrade is
* completed, upgrading fails.
*
* This operation does not yet consume the request or open the websocket. This
* only happens once the returned response has been passed to `respondWith()`.
*
* @category Web Sockets
*/
export function upgradeWebSocket(
request: Request,
options?: UpgradeWebSocketOptions,
): WebSocketUpgrade;
/** Send a signal to process under given `pid`. The value and meaning of the
* `signal` to the process is operating system and process dependant.
* {@linkcode Signal} provides the most common signals. Default signal
* is `"SIGTERM"`.
*
* The term `kill` is adopted from the UNIX-like command line command `kill`
* which also signals processes.
*
* If `pid` is negative, the signal will be sent to the process group
* identified by `pid`. An error will be thrown if a negative `pid` is used on
* Windows.
*
* ```ts
* const p = Deno.run({
* cmd: ["sleep", "10000"]
* });
*
* Deno.kill(p.pid, "SIGINT");
* ```
*
* Requires `allow-run` permission.
*
* @tags allow-run
* @category Sub Process
*/
export function kill(pid: number, signo?: Signal): void;
/** The type of the resource record to resolve via DNS using
* {@linkcode Deno.resolveDns}.
*
* Only the listed types are supported currently.
*
* @category Network
*/
export type RecordType =
| "A"
| "AAAA"
| "ANAME"
| "CAA"
| "CNAME"
| "MX"
| "NAPTR"
| "NS"
| "PTR"
| "SOA"
| "SRV"
| "TXT";
/**
* Options which can be set when using {@linkcode Deno.resolveDns}.
*
* @category Network */
export interface ResolveDnsOptions {
/** The name server to be used for lookups.
*
* If not specified, defaults to the system configuration. For example
* `/etc/resolv.conf` on Unix-like systems. */
nameServer?: {
/** The IP address of the name server. */
ipAddr: string;
/** The port number the query will be sent to.
*
* @default {53} */
port?: number;
};
/**
* An abort signal to allow cancellation of the DNS resolution operation.
* If the signal becomes aborted the resolveDns operation will be stopped
* and the promise returned will be rejected with an AbortError.
*/
signal?: AbortSignal;
}
/** If {@linkcode Deno.resolveDns} is called with `"CAA"` record type
* specified, it will resolve with an array of objects with this interface.
*
* @category Network
*/
export interface CAARecord {
/** If `true`, indicates that the corresponding property tag **must** be
* understood if the semantics of the CAA record are to be correctly
* interpreted by an issuer.
*
* Issuers **must not** issue certificates for a domain if the relevant CAA
* Resource Record set contains unknown property tags that have `critical`
* set. */
critical: boolean;
/** An string that represents the identifier of the property represented by
* the record. */
tag: string;
/** The value associated with the tag. */
value: string;
}
/** If {@linkcode Deno.resolveDns} is called with `"MX"` record type
* specified, it will return an array of objects with this interface.
*
* @category Network */
export interface MXRecord {
/** A priority value, which is a relative value compared to the other
* preferences of MX records for the domain. */
preference: number;
/** The server that mail should be delivered to. */
exchange: string;
}
/** If {@linkcode Deno.resolveDns} is called with `"NAPTR"` record type
* specified, it will return an array of objects with this interface.
*
* @category Network */
export interface NAPTRRecord {
order: number;
preference: number;
flags: string;
services: string;
regexp: string;
replacement: string;
}
/** If {@linkcode Deno.resolveDns} is called with `"SOA"` record type
* specified, it will return an array of objects with this interface.
*
* @category Network */
export interface SOARecord {
mname: string;
rname: string;
serial: number;
refresh: number;
retry: number;
expire: number;
minimum: number;
}
/** If {@linkcode Deno.resolveDns} is called with `"SRV"` record type
* specified, it will return an array of objects with this interface.
*
* @category Network
*/
export interface SRVRecord {
priority: number;
weight: number;
port: number;
target: string;
}
/**
* Performs DNS resolution against the given query, returning resolved
* records.
*
* Fails in the cases such as:
*
* - the query is in invalid format.
* - the options have an invalid parameter. For example `nameServer.port` is
* beyond the range of 16-bit unsigned integer.
* - the request timed out.
*
* ```ts
* const a = await Deno.resolveDns("example.com", "A");
*
* const aaaa = await Deno.resolveDns("example.com", "AAAA", {
* nameServer: { ipAddr: "8.8.8.8", port: 53 },
* });
* ```
*
* Requires `allow-net` permission.
*
* @tags allow-net
* @category Network
*/
export function resolveDns(
query: string,
recordType: "A" | "AAAA" | "ANAME" | "CNAME" | "NS" | "PTR",
options?: ResolveDnsOptions,
): Promise<string[]>;
/**
* Performs DNS resolution against the given query, returning resolved
* records.
*
* Fails in the cases such as:
*
* - the query is in invalid format.
* - the options have an invalid parameter. For example `nameServer.port` is
* beyond the range of 16-bit unsigned integer.
* - the request timed out.
*
* ```ts
* const a = await Deno.resolveDns("example.com", "A");
*
* const aaaa = await Deno.resolveDns("example.com", "AAAA", {
* nameServer: { ipAddr: "8.8.8.8", port: 53 },
* });
* ```
*
* Requires `allow-net` permission.
*
* @tags allow-net
* @category Network
*/
export function resolveDns(
query: string,
recordType: "CAA",
options?: ResolveDnsOptions,
): Promise<CAARecord[]>;
/**
* Performs DNS resolution against the given query, returning resolved
* records.
*
* Fails in the cases such as:
*
* - the query is in invalid format.
* - the options have an invalid parameter. For example `nameServer.port` is
* beyond the range of 16-bit unsigned integer.
* - the request timed out.
*
* ```ts
* const a = await Deno.resolveDns("example.com", "A");
*
* const aaaa = await Deno.resolveDns("example.com", "AAAA", {
* nameServer: { ipAddr: "8.8.8.8", port: 53 },
* });
* ```
*
* Requires `allow-net` permission.
*
* @tags allow-net
* @category Network
*/
export function resolveDns(
query: string,
recordType: "MX",
options?: ResolveDnsOptions,
): Promise<MXRecord[]>;
/**
* Performs DNS resolution against the given query, returning resolved
* records.
*
* Fails in the cases such as:
*
* - the query is in invalid format.
* - the options have an invalid parameter. For example `nameServer.port` is
* beyond the range of 16-bit unsigned integer.
* - the request timed out.
*
* ```ts
* const a = await Deno.resolveDns("example.com", "A");
*
* const aaaa = await Deno.resolveDns("example.com", "AAAA", {
* nameServer: { ipAddr: "8.8.8.8", port: 53 },
* });
* ```
*
* Requires `allow-net` permission.
*
* @tags allow-net
* @category Network
*/
export function resolveDns(
query: string,
recordType: "NAPTR",
options?: ResolveDnsOptions,
): Promise<NAPTRRecord[]>;
/**
* Performs DNS resolution against the given query, returning resolved
* records.
*
* Fails in the cases such as:
*
* - the query is in invalid format.
* - the options have an invalid parameter. For example `nameServer.port` is
* beyond the range of 16-bit unsigned integer.
* - the request timed out.
*
* ```ts
* const a = await Deno.resolveDns("example.com", "A");
*
* const aaaa = await Deno.resolveDns("example.com", "AAAA", {
* nameServer: { ipAddr: "8.8.8.8", port: 53 },
* });
* ```
*
* Requires `allow-net` permission.
*
* @tags allow-net
* @category Network
*/
export function resolveDns(
query: string,
recordType: "SOA",
options?: ResolveDnsOptions,
): Promise<SOARecord[]>;
/**
* Performs DNS resolution against the given query, returning resolved
* records.
*
* Fails in the cases such as:
*
* - the query is in invalid format.
* - the options have an invalid parameter. For example `nameServer.port` is
* beyond the range of 16-bit unsigned integer.
* - the request timed out.
*
* ```ts
* const a = await Deno.resolveDns("example.com", "A");
*
* const aaaa = await Deno.resolveDns("example.com", "AAAA", {
* nameServer: { ipAddr: "8.8.8.8", port: 53 },
* });
* ```
*
* Requires `allow-net` permission.
*
* @tags allow-net
* @category Network
*/
export function resolveDns(
query: string,
recordType: "SRV",
options?: ResolveDnsOptions,
): Promise<SRVRecord[]>;
/**
* Performs DNS resolution against the given query, returning resolved
* records.
*
* Fails in the cases such as:
*
* - the query is in invalid format.
* - the options have an invalid parameter. For example `nameServer.port` is
* beyond the range of 16-bit unsigned integer.
* - the request timed out.
*
* ```ts
* const a = await Deno.resolveDns("example.com", "A");
*
* const aaaa = await Deno.resolveDns("example.com", "AAAA", {
* nameServer: { ipAddr: "8.8.8.8", port: 53 },
* });
* ```
*
* Requires `allow-net` permission.
*
* @tags allow-net
* @category Network
*/
export function resolveDns(
query: string,
recordType: "TXT",
options?: ResolveDnsOptions,
): Promise<string[][]>;
/**
* Performs DNS resolution against the given query, returning resolved
* records.
*
* Fails in the cases such as:
*
* - the query is in invalid format.
* - the options have an invalid parameter. For example `nameServer.port` is
* beyond the range of 16-bit unsigned integer.
* - the request timed out.
*
* ```ts
* const a = await Deno.resolveDns("example.com", "A");
*
* const aaaa = await Deno.resolveDns("example.com", "AAAA", {
* nameServer: { ipAddr: "8.8.8.8", port: 53 },
* });
* ```
*
* Requires `allow-net` permission.
*
* @tags allow-net
* @category Network
*/
export function resolveDns(
query: string,
recordType: RecordType,
options?: ResolveDnsOptions,
): Promise<
| string[]
| CAARecord[]
| MXRecord[]
| NAPTRRecord[]
| SOARecord[]
| SRVRecord[]
| string[][]
>;
/**
* Make the timer of the given `id` block the event loop from finishing.
*
* @category Runtime
*/
export function refTimer(id: number): void;
/**
* Make the timer of the given `id` not block the event loop from finishing.
*
* @category Runtime
*/
export function unrefTimer(id: number): void;
/**
* Returns the user id of the process on POSIX platforms. Returns null on Windows.
*
* ```ts
* console.log(Deno.uid());
* ```
*
* Requires `allow-sys` permission.
*
* @tags allow-sys
* @category Runtime
*/
export function uid(): number | null;
/**
* Returns the group id of the process on POSIX platforms. Returns null on windows.
*
* ```ts
* console.log(Deno.gid());
* ```
*
* Requires `allow-sys` permission.
*
* @tags allow-sys
* @category Runtime
*/
export function gid(): number | null;
/** Additional information for an HTTP request and its connection.
*
* @category HTTP Server
*/
export interface ServeHandlerInfo {
/** The remote address of the connection. */
remoteAddr: Deno.NetAddr;
}
/** A handler for HTTP requests. Consumes a request and returns a response.
*
* If a handler throws, the server calling the handler will assume the impact
* of the error is isolated to the individual request. It will catch the error
* and if necessary will close the underlying connection.
*
* @category HTTP Server
*/
export type ServeHandler = (
request: Request,
info: ServeHandlerInfo,
) => Response | Promise<Response>;
/** Options which can be set when calling {@linkcode Deno.serve}.
*
* @category HTTP Server
*/
export interface ServeOptions {
/** The port to listen on.
*
* @default {8000} */
port?: number;
/** A literal IP address or host name that can be resolved to an IP address.
*
* __Note about `0.0.0.0`__ While listening `0.0.0.0` works on all platforms,
* the browsers on Windows don't work with the address `0.0.0.0`.
* You should show the message like `server running on localhost:8080` instead of
* `server running on 0.0.0.0:8080` if your program supports Windows.
*
* @default {"0.0.0.0"} */
hostname?: string;
/** An {@linkcode AbortSignal} to close the server and all connections. */
signal?: AbortSignal;
/** Sets `SO_REUSEPORT` on POSIX systems. */
reusePort?: boolean;
/** The handler to invoke when route handlers throw an error. */
onError?: (error: unknown) => Response | Promise<Response>;
/** The callback which is called when the server starts listening. */
onListen?: (localAddr: Deno.NetAddr) => void;
}
/** Additional options which are used when opening a TLS (HTTPS) server.
*
* @category HTTP Server
*/
export interface ServeTlsOptions extends ServeOptions {
/**
* Server private key in PEM format. Use {@linkcode TlsCertifiedKeyOptions} instead.
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*/
cert?: string;
/**
* Cert chain in PEM format. Use {@linkcode TlsCertifiedKeyOptions} instead.
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*/
key?: string;
}
/**
* @category HTTP Server
*/
export interface ServeInit {
/** The handler to invoke to process each incoming request. */
handler: ServeHandler;
}
/**
* @category HTTP Server
*/
export interface ServeTlsInit {
/** The handler to invoke to process each incoming request. */
handler: ServeHandler;
}
/** @category HTTP Server */
export interface ServeUnixOptions {
/** The unix domain socket path to listen on. */
path: string;
/** An {@linkcode AbortSignal} to close the server and all connections. */
signal?: AbortSignal;
/** The handler to invoke when route handlers throw an error. */
onError?: (error: unknown) => Response | Promise<Response>;
/** The callback which is called when the server starts listening. */
onListen?: (localAddr: Deno.UnixAddr) => void;
}
/** Information for a unix domain socket HTTP request.
*
* @category HTTP Server
*/
export interface ServeUnixHandlerInfo {
/** The remote address of the connection. */
remoteAddr: Deno.UnixAddr;
}
/** A handler for unix domain socket HTTP requests. Consumes a request and returns a response.
*
* If a handler throws, the server calling the handler will assume the impact
* of the error is isolated to the individual request. It will catch the error
* and if necessary will close the underlying connection.
*
* @category HTTP Server
*/
export type ServeUnixHandler = (
request: Request,
info: ServeUnixHandlerInfo,
) => Response | Promise<Response>;
/**
* @category HTTP Server
*/
export interface ServeUnixInit {
/** The handler to invoke to process each incoming request. */
handler: ServeUnixHandler;
}
/** An instance of the server created using `Deno.serve()` API.
*
* @category HTTP Server
*/
export interface HttpServer<A extends Deno.Addr = Deno.Addr>
extends AsyncDisposable {
/** A promise that resolves once server finishes - eg. when aborted using
* the signal passed to {@linkcode ServeOptions.signal}.
*/
finished: Promise<void>;
/** The local address this server is listening on. */
addr: A;
/**
* Make the server block the event loop from finishing.
*
* Note: the server blocks the event loop from finishing by default.
* This method is only meaningful after `.unref()` is called.
*/
ref(): void;
/** Make the server not block the event loop from finishing. */
unref(): void;
/** Gracefully close the server. No more new connections will be accepted,
* while pending requests will be allowed to finish.
*/
shutdown(): Promise<void>;
}
/**
* @category HTTP Server
*
* @deprecated This will be removed in Deno 2.0. See the
* {@link https://docs.deno.com/runtime/manual/advanced/migrate_deprecations | Deno 1.x to 2.x Migration Guide}
* for migration instructions.
*/
export type Server = HttpServer;
/** Serves HTTP requests with the given handler.
*
* The below example serves with the port `8000` on hostname `"127.0.0.1"`.
*
* ```ts
* Deno.serve((_req) => new Response("Hello, world"));
* ```
*
* @category HTTP Server
*/
export function serve(handler: ServeHandler): HttpServer<Deno.NetAddr>;
/** Serves HTTP requests with the given option bag and handler.
*
* You can specify the socket path with `path` option.
*
* ```ts
* Deno.serve(
* { path: "path/to/socket" },
* (_req) => new Response("Hello, world")
* );
* ```
*
* You can stop the server with an {@linkcode AbortSignal}. The abort signal
* needs to be passed as the `signal` option in the options bag. The server
* aborts when the abort signal is aborted. To wait for the server to close,
* await the promise returned from the `Deno.serve` API.
*
* ```ts
* const ac = new AbortController();
*
* const server = Deno.serve(
* { signal: ac.signal, path: "path/to/socket" },
* (_req) => new Response("Hello, world")
* );
* server.finished.then(() => console.log("Server closed"));
*
* console.log("Closing server...");
* ac.abort();
* ```
*
* By default `Deno.serve` prints the message
* `Listening on path/to/socket` on listening. If you like to
* change this behavior, you can specify a custom `onListen` callback.
*
* ```ts
* Deno.serve({
* onListen({ path }) {
* console.log(`Server started at ${path}`);
* // ... more info specific to your server ..
* },
* path: "path/to/socket",
* }, (_req) => new Response("Hello, world"));
* ```
*
* @category HTTP Server
*/
export function serve(
options: ServeUnixOptions,
handler: ServeUnixHandler,
): HttpServer<Deno.UnixAddr>;
/** Serves HTTP requests with the given option bag and handler.
*
* You can specify an object with a port and hostname option, which is the
* address to listen on. The default is port `8000` on hostname `"127.0.0.1"`.
*
* You can change the address to listen on using the `hostname` and `port`
* options. The below example serves on port `3000` and hostname `"0.0.0.0"`.
*
* ```ts
* Deno.serve(
* { port: 3000, hostname: "0.0.0.0" },
* (_req) => new Response("Hello, world")
* );
* ```
*
* You can stop the server with an {@linkcode AbortSignal}. The abort signal
* needs to be passed as the `signal` option in the options bag. The server
* aborts when the abort signal is aborted. To wait for the server to close,
* await the promise returned from the `Deno.serve` API.
*
* ```ts
* const ac = new AbortController();
*
* const server = Deno.serve(
* { signal: ac.signal },
* (_req) => new Response("Hello, world")
* );
* server.finished.then(() => console.log("Server closed"));
*
* console.log("Closing server...");
* ac.abort();
* ```
*
* By default `Deno.serve` prints the message
* `Listening on http://<hostname>:<port>/` on listening. If you like to
* change this behavior, you can specify a custom `onListen` callback.
*
* ```ts
* Deno.serve({
* onListen({ port, hostname }) {
* console.log(`Server started at http://${hostname}:${port}`);
* // ... more info specific to your server ..
* },
* }, (_req) => new Response("Hello, world"));
* ```
*
* To enable TLS you must specify the `key` and `cert` options.
*
* ```ts
* const cert = "-----BEGIN CERTIFICATE-----\n...\n-----END CERTIFICATE-----\n";
* const key = "-----BEGIN PRIVATE KEY-----\n...\n-----END PRIVATE KEY-----\n";
* Deno.serve({ cert, key }, (_req) => new Response("Hello, world"));
* ```
*
* @category HTTP Server
*/
export function serve(
options: ServeOptions,
handler: ServeHandler,
): HttpServer<Deno.NetAddr>;
/** Serves HTTP requests with the given option bag and handler.
*
* You can specify an object with a port and hostname option, which is the
* address to listen on. The default is port `8000` on hostname `"127.0.0.1"`.
*
* You can change the address to listen on using the `hostname` and `port`
* options. The below example serves on port `3000` and hostname `"0.0.0.0"`.
*
* ```ts
* Deno.serve(
* { port: 3000, hostname: "0.0.0.0" },
* (_req) => new Response("Hello, world")
* );
* ```
*
* You can stop the server with an {@linkcode AbortSignal}. The abort signal
* needs to be passed as the `signal` option in the options bag. The server
* aborts when the abort signal is aborted. To wait for the server to close,
* await the promise returned from the `Deno.serve` API.
*
* ```ts
* const ac = new AbortController();
*
* const server = Deno.serve(
* { signal: ac.signal },
* (_req) => new Response("Hello, world")
* );
* server.finished.then(() => console.log("Server closed"));
*
* console.log("Closing server...");
* ac.abort();
* ```
*
* By default `Deno.serve` prints the message
* `Listening on http://<hostname>:<port>/` on listening. If you like to
* change this behavior, you can specify a custom `onListen` callback.
*
* ```ts
* Deno.serve({
* onListen({ port, hostname }) {
* console.log(`Server started at http://${hostname}:${port}`);
* // ... more info specific to your server ..
* },
* }, (_req) => new Response("Hello, world"));
* ```
*
* To enable TLS you must specify the `key` and `cert` options.
*
* ```ts
* const cert = "-----BEGIN CERTIFICATE-----\n...\n-----END CERTIFICATE-----\n";
* const key = "-----BEGIN PRIVATE KEY-----\n...\n-----END PRIVATE KEY-----\n";
* Deno.serve({ cert, key }, (_req) => new Response("Hello, world"));
* ```
*
* @category HTTP Server
*/
export function serve(
options:
| ServeTlsOptions
| (ServeTlsOptions & TlsCertifiedKeyOptions),
handler: ServeHandler,
): HttpServer<Deno.NetAddr>;
/** Serves HTTP requests with the given option bag.
*
* You can specify an object with the path option, which is the
* unix domain socket to listen on.
*
* ```ts
* const ac = new AbortController();
*
* const server = Deno.serve({
* path: "path/to/socket",
* handler: (_req) => new Response("Hello, world"),
* signal: ac.signal,
* onListen({ path }) {
* console.log(`Server started at ${path}`);
* },
* });
* server.finished.then(() => console.log("Server closed"));
*
* console.log("Closing server...");
* ac.abort();
* ```
*
* @category HTTP Server
*/
export function serve(
options: ServeUnixInit & ServeUnixOptions,
): HttpServer<Deno.UnixAddr>;
/** Serves HTTP requests with the given option bag.
*
* You can specify an object with a port and hostname option, which is the
* address to listen on. The default is port `8000` on hostname `"127.0.0.1"`.
*
* ```ts
* const ac = new AbortController();
*
* const server = Deno.serve({
* port: 3000,
* hostname: "0.0.0.0",
* handler: (_req) => new Response("Hello, world"),
* signal: ac.signal,
* onListen({ port, hostname }) {
* console.log(`Server started at http://${hostname}:${port}`);
* },
* });
* server.finished.then(() => console.log("Server closed"));
*
* console.log("Closing server...");
* ac.abort();
* ```
*
* @category HTTP Server
*/
export function serve(
options:
& ServeInit
& ServeOptions,
): HttpServer<Deno.NetAddr>;
/** Serves HTTP requests with the given option bag.
*
* You can specify an object with a port and hostname option, which is the
* address to listen on. The default is port `8000` on hostname `"127.0.0.1"`.
*
* ```ts
* const ac = new AbortController();
*
* const server = Deno.serve({
* port: 3000,
* hostname: "0.0.0.0",
* handler: (_req) => new Response("Hello, world"),
* signal: ac.signal,
* onListen({ port, hostname }) {
* console.log(`Server started at http://${hostname}:${port}`);
* },
* });
* server.finished.then(() => console.log("Server closed"));
*
* console.log("Closing server...");
* ac.abort();
* ```
*
* @category HTTP Server
*/
export function serve(
options:
& ServeTlsInit
& (
| ServeTlsOptions
| (ServeTlsOptions & TlsCertifiedKeyOptions)
),
): HttpServer<Deno.NetAddr>;
}