foster/denoland-deno
1
0
Fork 0
mirror of https://github.com/denoland/deno.git synced 2024-12-22 15:24:46 -05:00
Code Issues Packages 1 Wiki Activity
denoland-deno/cli/dts/lib.deno.ns.d.ts

4353 lines
139 KiB
TypeScript
Vendored
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

// Copyright 2018-2022 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 ES Modules
*/
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;
/** 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 {}
/**
* 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 {}
}
/** The current process ID of this instance of the Deno CLI.
*
* ```ts
* console.log(Deno.pid);
* ```
*
* @category Runtime Environment
*/
export const pid: number;
/**
* The process ID of parent process of this instance of the Deno CLI.
*
* ```ts
* console.log(Deno.ppid);
* ```
*
* @category Runtime Environment
*/
export const ppid: number;
/** @category Runtime Environment */
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 Environment
*/
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 Environment
*/
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.
*
* @tags allow-sys
* @category Observability
*/
export function loadavg(): 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 Environment
*/
export const noColor: boolean;
/**
* 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.
*
* Defaults to `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.
*
* Defaults to `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.
*
* Defaults to `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>]`.
*
* Defaults to `false`.
*
* Examples:
*
* ```ts
* import { assertEquals } from "https://deno.land/std/testing/asserts.ts";
*
* 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 "https://deno.land/std/testing/asserts.ts";
*
* 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 "https://deno.land/std/testing/asserts.ts";
*
* 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 "https://deno.land/std/testing/asserts.ts";
*
* 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.
*
* Defaults to `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.
*
* Defaults to `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.
*
* Defaults to `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.
*
* Defaults to `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>;
}
/** @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. */
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.
*
* Defaults to `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.
*
* Defaults to `true`. */
sanitizeResources?: boolean;
/** Ensure the test case does not prematurely cause the process to exit,
* for example via a call to {@linkcode Deno.exit}.
*
* Defaults to `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}.
*
* Defaults to `"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 "https://deno.land/std/testing/asserts.ts";
*
* 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 function test(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 "https://deno.land/std/testing/asserts.ts";
*
* 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
*/
export function test(
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 "https://deno.land/std/testing/asserts.ts";
*
* 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
*/
export function test(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 "https://deno.land/std/testing/asserts.ts";
*
* 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
*/
export function test(
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 "https://deno.land/std/testing/asserts.ts";
*
* 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
*/
export function test(
options: Omit<TestDefinition, "fn">,
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 "https://deno.land/std/testing/asserts.ts";
*
* 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
*/
export function test(
options: Omit<TestDefinition, "fn" | "name">,
fn: (t: TestContext) => 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 Environment
*/
export function exit(code?: number): never;
/** An interface containing methods to interact with the process environment
* variables.
*
* @tags allow-env
* @category Runtime Environment
*/
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;
/** 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 Environment
*/
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 Environment
*/
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 Environment
*/
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 Environment
*/
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.
*
* @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
* [`itereateReader`](https://deno.land/std/streams/conversion.ts?s=iterateReader)
* from
* [`std/streams/conversion.ts`](https://deno.land/std/streams/conversion.ts)
* to turn a `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.
*
* @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
* [`itereateReaderSync`](https://deno.land/std/streams/conversion.ts?s=iterateReaderSync)
* from from
* [`std/streams/conversion.ts`](https://deno.land/std/streams/conversion.ts)
* to turn a `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.
*
* @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.
*
* 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.
*
* @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.
*
* @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, 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, 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 Use
* [`copy`](https://deno.land/std/streams/conversion.ts?s=copy) from
* [`std/streams/conversion.ts`](https://deno.land/std/streams/conversion.ts)
* instead. `Deno.copy` will be removed in the future.
*
* @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 Use
* [`iterateReader`](https://deno.land/std/streams/conversion.ts?s=iterateReader)
* from
* [`std/streams/conversion.ts`](https://deno.land/std/streams/conversion.ts)
* instead. `Deno.iter` will be removed in the future.
*
* @category I/O
*/
export function iter(
r: Reader,
options?: { bufSize?: number },
): AsyncIterableIterator<Uint8Array>;
/**
* Turns a ReaderSync, `r`, into an iterator.
*
* @deprecated Use
* [`iterateReaderSync`](https://deno.land/std/streams/conversion.ts?s=iterateReaderSync)
* from
* [`std/streams/conversion.ts`](https://deno.land/std/streams/conversion.ts)
* instead. `Deno.iterSync` will be removed in the future.
*
* @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
* file does not need to previously exist if using the `create` or `createNew`
* open options. It is the caller's responsibility to close the file when
* finished with it.
*
* ```ts
* const file = await Deno.open("/foo/bar.txt", { read: true, write: true });
* // Do work with file
* Deno.close(file.rid);
* ```
*
* 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. It is the caller's
* responsibility to close the file when finished with it.
*
* ```ts
* const file = Deno.openSync("/foo/bar.txt", { read: true, write: true });
* // Do work with file
* Deno.close(file.rid);
* ```
*
* 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}.
*
* ```ts
* const file = await Deno.create("/foo/bar.txt");
* ```
*
* Requires `allow-read` and `allow-write` permissions.
*
* @tags allow-read, allow-write
* @category File System
*/
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}.
*
* ```ts
* const file = Deno.createSync("/foo/bar.txt");
* ```
*
* Requires `allow-read` and `allow-write` permissions.
*
* @tags allow-read, allow-write
* @category File System
*/
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
* [`readAll()`](https://deno.land/std/streams/conversion.ts?s=readAll) from
* [`std/streams/conversion.ts`](https://deno.land/std/streams/conversion.ts)
* 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":
* const 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"
* Deno.close(file.rid);
* ```
*
* @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
* [`readAllSync()`](https://deno.land/std/streams/conversion.ts?s=readAllSync)
* from
* [`std/streams/conversion.ts`](https://deno.land/std/streams/conversion.ts)
* 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":
* const 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"
* Deno.close(file.rid);
* ```
*
* @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
* [`writeAll()`](https://deno.land/std/streams/conversion.ts?s=writeAll) from
* [`std/streams/conversion.ts`](https://deno.land/std/streams/conversion.ts)
* instead.
*
* **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");
* const file = await Deno.open("/foo/bar.txt", { write: true });
* const bytesWritten = await Deno.write(file.rid, data); // 11
* Deno.close(file.rid);
* ```
*
* @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
* [`writeAllSync()`](https://deno.land/std/streams/conversion.ts?s=writeAllSync)
* from
* [`std/streams/conversion.ts`](https://deno.land/std/streams/conversion.ts)
* instead.
*
* **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");
* const file = Deno.openSync("/foo/bar.txt", { write: true });
* const bytesWritten = Deno.writeSync(file.rid, data); // 11
* Deno.close(file.rid);
* ```
*
* @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:
* const file = await Deno.open(
* "hello.txt",
* { read: true, write: true, truncate: true, create: true },
* );
* await Deno.write(file.rid, 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"
* file.close();
* ```
*
* 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 Deno.write(file.rid, 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" (e.g. 11-2)
* file.close();
* ```
*
* @category I/O
*/
export function seek(
rid: number,
offset: number,
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
* const file = Deno.openSync(
* "hello.txt",
* { read: true, write: true, truncate: true, create: true },
* );
* Deno.writeSync(file.rid, 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"
* file.close();
* ```
*
* The seek modes work as follows:
*
* ```ts
* // Given file.rid pointing to file with "Hello world", which is 11 bytes long:
* const file = Deno.openSync(
* "hello.txt",
* { read: true, write: true, truncate: true, create: true },
* );
* Deno.writeSync(file.rid, 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" (e.g. 11-2)
* file.close();
* ```
*
* @category I/O
*/
export function seekSync(
rid: number,
offset: number,
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 Deno.write(file.rid, new TextEncoder().encode("Hello World"));
* await Deno.ftruncate(file.rid, 1);
* await Deno.fsync(file.rid);
* console.log(new TextDecoder().decode(await Deno.readFile("my_file.txt"))); // H
* ```
*
* @category I/O
*/
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 },
* );
* Deno.writeSync(file.rid, new TextEncoder().encode("Hello World"));
* Deno.ftruncateSync(file.rid, 1);
* Deno.fsyncSync(file.rid);
* console.log(new TextDecoder().decode(Deno.readFileSync("my_file.txt"))); // H
* ```
*
* @category I/O
*/
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 Deno.write(file.rid, new TextEncoder().encode("Hello World"));
* await Deno.fdatasync(file.rid);
* console.log(new TextDecoder().decode(await Deno.readFile("my_file.txt"))); // Hello World
* ```
*
* @category I/O
*/
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 },
* );
* Deno.writeSync(file.rid, new TextEncoder().encode("Hello World"));
* Deno.fdatasyncSync(file.rid);
* console.log(new TextDecoder().decode(Deno.readFileSync("my_file.txt"))); // Hello World
* ```
*
* @category I/O
*/
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);
* ```
*
* @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 discreet functions within the `Deno` namespace.
*
* ```ts
* const 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"
* }
* file.close();
* ```
*
* @category File System
*/
export class FsFile
implements
Reader,
ReaderSync,
Writer,
WriterSync,
Seeker,
SeekerSync,
Closer {
/** The resource ID associated with the file instance. The resource ID
* should be considered an opaque reference to resource. */
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
* const 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));
* }
* file.close();
* ```
*/
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"];
* const 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));
* }
* file.close();
* ```
*/
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`. */
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");
* const file = await Deno.open("/foo/bar.txt", { write: true });
* const bytesWritten = await file.write(data); // 11
* file.close();
* ```
*
* @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");
* const file = Deno.openSync("/foo/bar.txt", { write: true });
* const bytesWritten = file.writeSync(data); // 11
* file.close();
* ```
*/
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
* const file = await Deno.open("my_file.txt", { write: true });
* await file.truncate();
* file.close();
* ```
*
* ### Truncate part of the file
*
* ```ts
* // if "my_file.txt" contains the text "hello world":
* const 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"
* file.close();
* ```
*/
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
* const file = Deno.openSync("my_file.txt", { write: true });
* file.truncateSync();
* file.close();
* ```
*
* ### Truncate part of the file
*
* ```ts
* // if "my_file.txt" contains the text "hello world":
* const 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"
* file.close();
* ```
*/
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":
* const 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"
* file.close();
* ```
*/
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":
* const 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"
* file.close();
* ```
*/
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:
* const 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"
* file.close();
* ```
*
* 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" (e.g. 11-2)
* ```
*/
seek(offset: number, 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
* const 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"
* file.close();
* ```
*
* The seek modes work as follows:
*
* ```ts
* // Given file.rid pointing to file with "Hello world", which is 11 bytes long:
* const 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" (e.g. 11-2)
* file.close();
* ```
*/
seekSync(offset: number, whence: SeekMode): number;
/** Resolves to a {@linkcode Deno.FileInfo} for the file.
*
* ```ts
* import { assert } from "https://deno.land/std/testing/asserts.ts";
*
* const file = await Deno.open("hello.txt");
* const fileInfo = await file.stat();
* assert(fileInfo.isFile);
* file.close();
* ```
*/
stat(): Promise<FileInfo>;
/** Synchronously returns a {@linkcode Deno.FileInfo} for the file.
*
* ```ts
* import { assert } from "https://deno.land/std/testing/asserts.ts";
*
* const file = Deno.openSync("hello.txt")
* const fileInfo = file.statSync();
* assert(fileInfo.isFile);
* file.close();
* ```
*/
statSync(): FileInfo;
/** Close the 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
* file.close();
* ```
*/
close(): void;
}
/**
* The Deno abstraction for reading and writing files.
*
* @deprecated Use {@linkcode Deno.FsFile} instead. `Deno.File` will be
* removed in the future.
* @category File System
*/
export const File: typeof FsFile;
/** @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 discreet
* I/O functions in the `Deno` namespace. */
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;
};
/** 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 discreet
* I/O functions in the `Deno` namespace. */
readonly rid: number;
/** A writable stream interface to `stdout`. */
readonly writable: WritableStream<Uint8Array>;
};
/** 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 discreet
* I/O functions in the `Deno` namespace. */
readonly rid: number;
/** A writable stream interface to `stderr`. */
readonly writable: WritableStream<Uint8Array>;
};
/**
* Options which can be set when doing {@linkcode Deno.open} and
* {@linkcode Deno.openSync}.
*
* @category File System */
export interface OpenOptions {
/** Defaults to `true`. Sets the option for read access. This option, when `true`, means that
* the file should be read-able if opened. */
read?: boolean;
/** Defaults to `false`. 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. */
write?: boolean;
/** Defaults to `false`. 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 }`. */
append?: boolean;
/** Defaults to `false`. 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. */
truncate?: boolean;
/** Defaults to `false`. 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. */
create?: boolean;
/** Defaults to `false`. 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. */
createNew?: boolean;
/** Permissions to use if creating the file (defaults to `0o666`, before
* the process's umask).
*
* 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;
}
/**
* 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
* Deno.close(nonTTYRid);
* Deno.close(ttyRid);
* ```
*
* @category I/O
*/
export function isatty(rid: number): boolean;
/**
* A variable-sized buffer of bytes with `read()` and `write()` methods.
*
* @deprecated Use [`Buffer`](https://deno.land/std/io/buffer.ts?s=Buffer)
* from [`std/io/buffer.ts`](https://deno.land/std/io/buffer.ts) instead.
* `Deno.Buffer` will be removed in the future.
*
* @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`.
*
* @deprecated Use
* [`readAll`](https://deno.land/std/streams/conversion.ts?s=readAll) from
* [`std/streams/conversion.ts`](https://deno.land/std/streams/conversion.ts)
* instead. `Deno.readAll` will be removed in the future.
*
* @category I/O
*/
export function readAll(r: Reader): Promise<Uint8Array>;
/**
* Synchronously reads Reader `r` until EOF (`null`) and returns the content
* as `Uint8Array`.
*
* @deprecated Use
* [`readAllSync`](https://deno.land/std/streams/conversion.ts?s=readAllSync)
* from
* [`std/streams/conversion.ts`](https://deno.land/std/streams/conversion.ts)
* instead. `Deno.readAllSync` will be removed in the future.
*
* @category I/O
*/
export function readAllSync(r: ReaderSync): Uint8Array;
/**
* Write all the content of the array buffer (`arr`) to the writer (`w`).
*
* @deprecated Use
* [`writeAll`](https://deno.land/std/streams/conversion.ts?s=writeAll) from
* [`std/streams/conversion.ts`](https://deno.land/std/streams/conversion.ts)
* instead. `Deno.writeAll` will be removed in the future.
*
* @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 Use
* [`writeAllSync`](https://deno.land/std/streams/conversion.ts?s=writeAllSync)
* from
* [`std/streams/conversion.ts`](https://deno.land/std/streams/conversion.ts)
* instead. `Deno.writeAllSync` will be removed in the future.
*
* @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 {
/** Defaults to `false`. 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. */
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 });
* ```
*
* 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 });
* ```
*
* 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 */
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;
}
/** 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.
*
* 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.
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.
*
* ```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;
/** 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.
*
* 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.
*
* ```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
*/
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 |
*
* 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 {
/** Defaults to `false`. If set to `true`, path will be removed even if
* it's a non-empty directory. */
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;
/** 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.
*
* _Linux/Mac OS only._ */
dev: number | null;
/** Inode number.
*
* _Linux/Mac OS only._ */
ino: number | null;
/** **UNSTABLE**: Match behavior with Go on Windows for `mode`.
*
* The underlying raw `st_mode` bits that contain the standard Unix
* permissions for this file/directory. */
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;
/** 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;
}
/** Resolves to the absolute normalized path, with symbolic links resolved.
*
* ```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>;
/** Synchronously returns absolute normalized path, with symbolic links
* resolved.
*
* ```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;
/**
* 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}.
*
* ```ts
* for await (const dirEntry of Deno.readDir("/")) {
* console.log(dirEntry.name);
* }
* ```
*
* 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 `Deno.DirEntry`.
*
* ```ts
* for (const dirEntry of Deno.readDirSync("/")) {
* console.log(dirEntry.name);
* }
* ```
*
* 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
* ```
*
* 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.
*
* ```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 "https://deno.land/std/testing/asserts.ts";
* 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 "https://deno.land/std/testing/asserts.ts";
* 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 "https://deno.land/std/testing/asserts.ts";
* 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 "https://deno.land/std/testing/asserts.ts";
* 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 {
/** Defaults to `false`. If set to `true`, will append to a file instead of
* overwriting previous contents. */
append?: boolean;
/** Sets the option to allow creating a new file, if one doesn't already
* exist at the specified path (defaults to `true`). */
create?: 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,
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,
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
*
* ```
* const file = await Deno.makeTempFile();
* await Deno.writeFile(file, new TextEncoder().encode("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 Observability */
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 Observability */
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 Observability
*/
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.
*
* @category Observability */
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" }
* ```
*
* @category Observability
*/
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 */
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. */
paths: string[];
/** Any additional flags associated with the event. */
flag?: FsEventFlag;
}
/**
* 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
*/
export interface FsWatcher extends AsyncIterable<FsEvent> {
/** The resource id. */
readonly rid: number;
/** Stops watching the file system and closes the watcher resource. */
close(): void;
/**
* Stops watching the file system and closes the watcher resource.
*
* @deprecated Will be removed in the future.
*/
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" ] }
* }
* ```
*
* Call `watcher.close()` to stop watching.
*
* ```ts
* const watcher = Deno.watchFs("/");
*
* setTimeout(() => {
* 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(
paths: string | string[],
options?: { recursive: boolean },
): FsWatcher;
/** Options which can be used with {@linkcode Deno.run}.
*
* @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`.
*
* @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.
*
* @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.
*
* ```ts
* const p = Deno.run({ cmd: [ "sleep", "20" ]});
* p.kill("SIGTERM");
* p.close();
* ```
*/
kill(signo: Signal): void;
}
/** Operating signals which can be listened for or sent to sub-processes. What
* signals and what their standard behaviors are are OS dependent.
*
* @category Runtime Environment */
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 Environment
*/
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 Environment
*/
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();
* ```
*
* 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 process’s 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.
*
* @tags allow-run
* @category Sub Process
*/
export function run<T extends RunOptions = RunOptions>(opt: T): Process<T>;
/** Option which can be specified when performing {@linkcode Deno.inspect}.
*
* @category Console and Debugging */
export interface InspectOptions {
/** Stylize output with ANSI colors. Defaults to `false`. */
colors?: boolean;
/** Try to fit more than one entry of a collection on the same line.
* Defaults to `true`. */
compact?: boolean;
/** Traversal depth for nested objects. Defaults to `4`. */
depth?: number;
/** The maximum number of iterable entries to print. Defaults to `100`. */
iterableLimit?: number;
/** Show a Proxy's target and handler. Defaults to `false`. */
showProxy?: boolean;
/** Sort Object, Set and Map entries by key. Defaults to `false`. */
sorted?: boolean;
/** Add a trailing comma for multiline collections. Defaults to `false`. */
trailingComma?: boolean;
/*** Evaluate the result of calling getters. Defaults to `false`. */
getters?: boolean;
/** Show an object's non-enumerable properties. Defaults to `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 Console and Debugging
*/
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";
/** @category Permissions */
export interface RunPermissionDescriptor {
name: "run";
command?: string | URL;
}
/** @category Permissions */
export interface ReadPermissionDescriptor {
name: "read";
path?: string | URL;
}
/** @category Permissions */
export interface WritePermissionDescriptor {
name: "write";
path?: string | URL;
}
/** @category Permissions */
export interface NetPermissionDescriptor {
name: "net";
/** Optional host string of the form `"<hostname>[:<port>]"`. Examples:
*
* "github.com"
* "deno.land:8080"
*/
host?: string;
}
/** @category Permissions */
export interface EnvPermissionDescriptor {
name: "env";
variable?: string;
}
/** @category Permissions */
export interface SysPermissionDescriptor {
name: "sys";
kind?:
| "loadavg"
| "hostname"
| "systemMemoryInfo"
| "networkInterfaces"
| "osRelease"
| "getUid"
| "getGid";
}
/** @category Permissions */
export interface FfiPermissionDescriptor {
name: "ffi";
path?: string | URL;
}
/** @category Permissions */
export interface HrtimePermissionDescriptor {
name: "hrtime";
}
/** Permission descriptors which define a permission and can be queried,
* requested, or revoked.
*
* @category Permissions
*/
export type PermissionDescriptor =
| RunPermissionDescriptor
| ReadPermissionDescriptor
| WritePermissionDescriptor
| NetPermissionDescriptor
| EnvPermissionDescriptor
| SysPermissionDescriptor
| FfiPermissionDescriptor
| HrtimePermissionDescriptor;
/** @category Permissions */
export interface PermissionStatusEventMap {
"change": Event;
}
/** @category Permissions */
export class PermissionStatus extends EventTarget {
// deno-lint-ignore no-explicit-any
onchange: ((this: PermissionStatus, ev: Event) => any) | null;
readonly state: PermissionState;
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;
}
/** @category Permissions */
export class Permissions {
/** Resolves to the current status of a permission.
*
* ```ts
* const status = await Deno.permissions.query({ name: "read", path: "/etc" });
* console.log(status.state);
* ```
*/
query(desc: PermissionDescriptor): Promise<PermissionStatus>;
/** Revokes a permission, and resolves to the state of the permission.
*
* ```ts
* import { assert } from "https://deno.land/std/testing/asserts.ts";
*
* const status = await Deno.permissions.revoke({ name: "run" });
* assert(status.state !== "granted")
* ```
*/
revoke(desc: PermissionDescriptor): Promise<PermissionStatus>;
/** Requests the permission, and resolves to the state of the permission.
*
* ```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>;
}
/** Deno's permission management API.
*
* @category Permissions
*/
export const permissions: Permissions;
/** Build related information.
*
* @category Runtime Environment
*/
export const build: {
/** The LLVM target triple */
target: string;
/** Instruction set architecture */
arch: "x86_64" | "aarch64";
/** Operating system */
os: "darwin" | "linux" | "windows";
/** Computer vendor */
vendor: string;
/** Optional environment */
env?: string;
};
/** Version related information.
*
* @category Runtime Environment
*/
export const version: {
/** Deno's version. For example: `"1.0.0"` */
deno: string;
/** The V8 version used by Deno. For example: `"8.0.0.0"` */
v8: string;
/** The TypeScript version used by Deno. For example: `"4.0.0"` */
typescript: string;
};
/** Returns the script arguments to the program. If for example we run a
* program:
*
* deno run --allow-read https://deno.land/std/examples/cat.ts /etc/passwd
*
* Then `Deno.args` will contain:
*
* [ "/etc/passwd" ]
*
* @category Runtime Environment
*/
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 symbol is deprecated since 1.9. Use
* `Symbol.for("Deno.customInspect")` instead.
*
* @category Console and Debugging
*/
export const customInspect: unique symbol;
/** The URL of the entrypoint module entered from the command-line.
*
* @category Runtime Environment
*/
export const mainModule: string;
/** @category File System */
export type SymlinkOptions = {
type: "file" | "dir";
};
/**
* Creates `newpath` as a symbolic link to `oldpath`.
*
* The options.type parameter can be set to `file` or `dir`. 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;
/**
* Creates `newpath` as a symbolic link to `oldpath`.
*
* The options.type parameter can be set to `file` or `dir`. 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>;
/**
* 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').
*
* ```ts
* // truncate the entire file
* const file = Deno.openSync("my_file.txt", { read: true, write: true, truncate: true, create: true });
* Deno.ftruncateSync(file.rid);
* ```
*
* ```ts
* // truncate part of the file
* const file = Deno.openSync("my_file.txt", { read: true, write: true, create: true });
* Deno.writeSync(file.rid, 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
* ```
*
* @category File System
*/
export function ftruncateSync(rid: number, len?: number): 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').
*
* ```ts
* // truncate the entire file
* const file = await Deno.open("my_file.txt", { read: true, write: true, create: true });
* await Deno.ftruncate(file.rid);
* ```
*
* ```ts
* // truncate part of the file
* const file = await Deno.open("my_file.txt", { read: true, write: true, create: true });
* await Deno.write(file.rid, 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
* ```
*
* @category File System
*/
export function ftruncate(rid: number, len?: number): Promise<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());
* ```
*
* @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());
* ```
*
* @category File System
*/
export function futime(
rid: number,
atime: number | Date,
mtime: number | Date,
): Promise<void>;
/**
* Synchronously returns a `Deno.FileInfo` for the given file stream.
*
* ```ts
* import { assert } from "https://deno.land/std/testing/asserts.ts";
* const file = Deno.openSync("file.txt", { read: true });
* const fileInfo = Deno.fstatSync(file.rid);
* assert(fileInfo.isFile);
* ```
*
* @category File System
*/
export function fstatSync(rid: number): FileInfo;
/**
* Returns a `Deno.FileInfo` for the given file stream.
*
* ```ts
* import { assert } from "https://deno.land/std/testing/asserts.ts";
* const file = await Deno.open("file.txt", { read: true });
* const fileInfo = await Deno.fstat(file.rid);
* assert(fileInfo.isFile);
* ```
*
* @category File System
*/
export function fstat(rid: number): Promise<FileInfo>;
/** @category HTTP Server */
export interface RequestEvent {
readonly request: Request;
respondWith(r: Response | Promise<Response>): Promise<void>;
}
/** @category HTTP Server */
export interface HttpConn extends AsyncIterable<RequestEvent> {
readonly rid: number;
nextRequest(): Promise<RequestEvent | null>;
close(): void;
}
/**
* Services HTTP requests given a TCP or TLS socket.
*
* ```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"));
* }
* ```
*
* If `httpConn.nextRequest()` encounters an error or returns `null`
* then the underlying HttpConn resource is closed automatically.
*
* 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);
* }
* ```
*
* 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
*/
export function serveHttp(conn: Conn): HttpConn;
/** @category Web Sockets */
export interface WebSocketUpgrade {
response: Response;
socket: WebSocket;
}
/** @category Web Sockets */
export interface UpgradeWebSocketOptions {
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 default is 120 seconds. Set to 0 to disable timeouts.
*/
idleTimeout?: number;
}
/**
* Used to upgrade an incoming HTTP request to a WebSocket.
*
* Given a request, returns a pair of WebSocket and Response. 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`.
*
* 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.
* Only the listed types are supported currently.
*
* @category Network
*/
export type RecordType =
| "A"
| "AAAA"
| "ANAME"
| "CAA"
| "CNAME"
| "MX"
| "NAPTR"
| "NS"
| "PTR"
| "SOA"
| "SRV"
| "TXT";
/** @category Network */
export interface ResolveDnsOptions {
/** The name server to be used for lookups.
* If not specified, defaults to the system configuration e.g. `/etc/resolv.conf` on Unix. */
nameServer?: {
/** The IP address of the name server */
ipAddr: string;
/** The port number the query will be sent to.
* If not specified, defaults to 53. */
port?: number;
};
}
/** If `resolveDns` is called with "CAA" record type specified, it will return
* an array of this interface.
*
* @category Network
*/
export interface CAARecord {
critical: boolean;
tag: string;
value: string;
}
/** If `resolveDns` is called with "MX" record type specified, it will return
* an array of this interface.
*
* @category Network
*/
export interface MXRecord {
preference: number;
exchange: string;
}
/** If `resolveDns` is called with "NAPTR" record type specified, it will
* return an array of this interface.
*
* @category Network
*/
export interface NAPTRRecord {
order: number;
preference: number;
flags: string;
services: string;
regexp: string;
replacement: string;
}
/** If `resolveDns` is called with "SOA" record type specified, it will return
* an array of this interface.
*
* @category Network
*/
export interface SOARecord {
mname: string;
rname: string;
serial: number;
refresh: number;
retry: number;
expire: number;
minimum: number;
}
/** If `resolveDns` is called with "SRV" record type specified, it will return
* an array of this interface.
*
* @category Network
*/
export interface SRVRecord {
priority: number;
weight: number;
port: number;
target: string;
}
/** @category Network */
export function resolveDns(
query: string,
recordType: "A" | "AAAA" | "ANAME" | "CNAME" | "NS" | "PTR",
options?: ResolveDnsOptions,
): Promise<string[]>;
/** @category Network */
export function resolveDns(
query: string,
recordType: "CAA",
options?: ResolveDnsOptions,
): Promise<CAARecord[]>;
/** @category Network */
export function resolveDns(
query: string,
recordType: "MX",
options?: ResolveDnsOptions,
): Promise<MXRecord[]>;
/** @category Network */
export function resolveDns(
query: string,
recordType: "NAPTR",
options?: ResolveDnsOptions,
): Promise<NAPTRRecord[]>;
/** @category Network */
export function resolveDns(
query: string,
recordType: "SOA",
options?: ResolveDnsOptions,
): Promise<SOARecord[]>;
/** @category Network */
export function resolveDns(
query: string,
recordType: "SRV",
options?: ResolveDnsOptions,
): Promise<SRVRecord[]>;
/** @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, e.g. `nameServer.port` is beyond the range of 16-bit unsigned integer
* - 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 Timers
*/
export function refTimer(id: number): void;
/**
* Make the timer of the given `id` not block the event loop from finishing.
*
* @category Timers
*/
export function unrefTimer(id: number): void;
}
View git blame Copy permalink