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feat: add ensureDir/ensureFile for fs modules (denoland/deno_std#264)

Original: 9ae941338a
This commit is contained in:
Axetroy 2019-03-12 13:52:43 +08:00 committed by Ryan Dahl
parent f124e64526
commit 1bfc46bbd2
5 changed files with 218 additions and 0 deletions

32
fs/ensure_dir.ts Normal file
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@ -0,0 +1,32 @@
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
/**
* Ensures that the directory exists. If the directory structure does not exist, it is created. Like mkdir -p.
* @export
* @param {string} dir
* @returns {Promise<void>}
*/
export async function ensureDir(dir: string): Promise<void> {
try {
// if dir exists
await Deno.stat(dir);
} catch {
// if dir not exists. then create it.
await Deno.mkdir(dir, true);
}
}
/**
* Ensures that the directory exists. If the directory structure does not exist, it is created. Like mkdir -p.
* @export
* @param {string} dir
* @returns {void}
*/
export function ensureDirSync(dir: string): void {
try {
// if dir exists
Deno.statSync(dir);
} catch {
// if dir not exists. then create it.
Deno.mkdirSync(dir, true);
}
}

71
fs/ensure_dir_test.ts Normal file
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// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
import { test } from "../testing/mod.ts";
import { assertThrows, assertThrowsAsync } from "../testing/asserts.ts";
import { ensureDir, ensureDirSync } from "./ensure_dir.ts";
import * as path from "./path/mod.ts";
const testdataDir = path.resolve("fs", "testdata");
test(async function ensureDirIfItNotExist() {
const baseDir = path.join(testdataDir, "ensure_dir_not_exist");
const testDir = path.join(baseDir, "test");
await ensureDir(testDir);
assertThrowsAsync(async () => {
await Deno.stat(testDir).then(() => {
throw new Error("test dir should exists.");
});
});
await Deno.remove(baseDir, { recursive: true });
});
test(function ensureDirSyncIfItNotExist() {
const baseDir = path.join(testdataDir, "ensure_dir_sync_not_exist");
const testDir = path.join(baseDir, "test");
ensureDirSync(testDir);
assertThrows(() => {
Deno.statSync(testDir);
throw new Error("test dir should exists.");
});
Deno.removeSync(baseDir, { recursive: true });
});
test(async function ensureDirIfItExist() {
const baseDir = path.join(testdataDir, "ensure_dir_exist");
const testDir = path.join(baseDir, "test");
// create test directory
await Deno.mkdir(testDir, true);
await ensureDir(testDir);
assertThrowsAsync(async () => {
await Deno.stat(testDir).then(() => {
throw new Error("test dir should still exists.");
});
});
await Deno.remove(baseDir, { recursive: true });
});
test(function ensureDirSyncIfItExist() {
const baseDir = path.join(testdataDir, "ensure_dir_sync_exist");
const testDir = path.join(baseDir, "test");
// create test directory
Deno.mkdirSync(testDir, true);
ensureDirSync(testDir);
assertThrows(() => {
Deno.statSync(testDir);
throw new Error("test dir should still exists.");
});
Deno.removeSync(baseDir, { recursive: true });
});

42
fs/ensure_file.ts Normal file
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// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
import * as path from "./path/mod.ts";
import { ensureDir, ensureDirSync } from "./ensure_dir.ts";
/**
* Ensures that the file exists.
* If the file that is requested to be created is in directories that do not exist, these directories are created. If the file already exists, it is NOT MODIFIED.
* @export
* @param {string} filePath
* @returns {Promise<void>}
*/
export async function ensureFile(filePath: string): Promise<void> {
try {
// if file exists
await Deno.stat(filePath);
} catch {
// if file not exists
// ensure dir exists
await ensureDir(path.dirname(filePath));
// create file
await Deno.writeFile(filePath, new Uint8Array());
}
}
/**
* Ensures that the file exists.
* If the file that is requested to be created is in directories that do not exist, these directories are created. If the file already exists, it is NOT MODIFIED.
* @export
* @param {string} filePath
* @returns {void}
*/
export function ensureFileSync(filePath: string): void {
try {
// if file exists
Deno.statSync(filePath);
} catch {
// if file not exists
// ensure dir exists
ensureDirSync(path.dirname(filePath));
// create file
Deno.writeFileSync(filePath, new Uint8Array());
}
}

71
fs/ensure_file_test.ts Normal file
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// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
import { test } from "../testing/mod.ts";
import { assertThrows, assertThrowsAsync } from "../testing/asserts.ts";
import { ensureFile, ensureFileSync } from "./ensure_file.ts";
import * as path from "./path/mod.ts";
const testdataDir = path.resolve("fs", "testdata");
test(async function ensureFileIfItNotExist() {
const testDir = path.join(testdataDir, "ensure_file_1");
const testFile = path.join(testDir, "test.txt");
await ensureFile(testFile);
assertThrowsAsync(async () => {
await Deno.stat(testFile).then(() => {
throw new Error("test file should exists.");
});
});
await Deno.remove(testDir, { recursive: true });
});
test(function ensureFileSyncIfItNotExist() {
const testDir = path.join(testdataDir, "ensure_file_2");
const testFile = path.join(testDir, "test.txt");
ensureFileSync(testFile);
assertThrows(() => {
Deno.statSync(testFile);
throw new Error("test file should exists.");
});
Deno.removeSync(testDir, { recursive: true });
});
test(async function ensureFileIfItExist() {
const testDir = path.join(testdataDir, "ensure_file_3");
const testFile = path.join(testDir, "test.txt");
await Deno.mkdir(testDir, true);
await Deno.writeFile(testFile, new Uint8Array());
await ensureFile(testFile);
assertThrowsAsync(async () => {
await Deno.stat(testFile).then(() => {
throw new Error("test file should exists.");
});
});
await Deno.remove(testDir, { recursive: true });
});
test(function ensureFileSyncIfItExist() {
const testDir = path.join(testdataDir, "ensure_file_4");
const testFile = path.join(testDir, "test.txt");
Deno.mkdirSync(testDir, true);
Deno.writeFileSync(testFile, new Uint8Array());
ensureFileSync(testFile);
assertThrows(() => {
Deno.statSync(testFile);
throw new Error("test file should exists.");
});
Deno.removeSync(testDir, { recursive: true });
});

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@ -15,6 +15,8 @@ import "./fs/globrex_test.ts";
import "./fs/glob_test.ts";
import "./fs/exists_test.ts";
import "./fs/empty_dir_test.ts";
import "./fs/ensure_dir_test.ts";
import "./fs/ensure_file_test.ts";
import "./io/test.ts";
import "./http/server_test.ts";
import "./http/file_server_test.ts";