microsoft/vscode-react-native
Publicmirrored from https://github.com/microsoft/vscode-react-nativeAvailable
src/utils/node/fileSystem.ts
73lines · modeblame
3fb37ad5unknown10 years ago | 1 | // Copyright (c) Microsoft Corporation. All rights reserved. |
| 2 | // Licensed under the MIT license. See LICENSE file in the project root for details. | |
| 3 | | |
| 4 | import * as fs from "fs"; | |
bc7a32ceJimmy Thomson10 years ago | 5 | import * as path from "path"; |
3fb37ad5unknown10 years ago | 6 | import * as Q from "q"; |
| 7 | | |
| 8 | export class FileSystem { | |
| 9 | | |
| 10 | public ensureDirectory(dir: string): Q.Promise<void> { | |
| 11 | return Q.nfcall(fs.stat, dir).then((stat: fs.Stats): void => { | |
| 12 | if (stat.isDirectory()) { | |
| 13 | return; | |
| 14 | } else { | |
| 15 | throw new Error(`Expected ${dir} to be a directory`); | |
| 16 | } | |
| 17 | }, (err: Error & {code?: string}): Q.Promise<any> => { | |
| 18 | if (err && err.code === "ENOENT") { | |
| 19 | return Q.nfcall(fs.mkdir, dir); | |
| 20 | } else { | |
| 21 | throw err; | |
| 22 | } | |
| 23 | }); | |
| 24 | } | |
| 25 | | |
| 26 | public ensureFileWithContents(file: string, contents: string): Q.Promise<void> { | |
| 27 | return Q.nfcall(fs.stat, file).then((stat: fs.Stats): void => { | |
| 28 | if (!stat.isFile()) { | |
| 29 | throw new Error(`Expected ${file} to be a file`); | |
| 30 | } | |
| 31 | // The file already exists, assume the contents are good and do not touch it. | |
| 32 | }, (err: Error & {code?: string}): Q.Promise<any> => { | |
| 33 | if (err && err.code === "ENOENT") { | |
| 34 | return Q.nfcall(fs.writeFile, file, contents); | |
| 35 | } else { | |
| 36 | throw err; | |
| 37 | } | |
| 38 | }); | |
| 39 | } | |
| 40 | | |
| 41 | public fileExistsSync(filename: string) { | |
| 42 | try { | |
| 43 | fs.lstatSync(filename); | |
| 44 | return true; | |
| 45 | } catch (error) { | |
| 46 | return false; | |
| 47 | } | |
| 48 | } | |
| 49 | | |
| 50 | public deleteFileIfExistsSync(filename: string) { | |
| 51 | if (this.fileExistsSync(filename)) { | |
| 52 | fs.unlinkSync(filename); | |
| 53 | } | |
| 54 | } | |
| 55 | | |
5d4d4de0digeff10 years ago | 56 | public readFile(filename: string, encoding: string = "utf8"): Q.Promise<string> { |
0555a744digeff10 years ago | 57 | return Q.nfcall<string>(fs.readFile, filename, encoding); |
3fb37ad5unknown10 years ago | 58 | } |
4677921cdigeff10 years ago | 59 | |
| 60 | public writeFile(filename: string, data: any): Q.Promise<void> { | |
0555a744digeff10 years ago | 61 | return Q.nfcall<void>(fs.writeFile, filename, data); |
4677921cdigeff10 years ago | 62 | } |
bc7a32ceJimmy Thomson10 years ago | 63 | |
afc46a73Jimmy Thomson10 years ago | 64 | public findFilesByExtension(folder: string, extension: string): Q.Promise<string[]> { |
bc7a32ceJimmy Thomson10 years ago | 65 | return Q.nfcall(fs.readdir, folder).then((files: string[]) => { |
| 66 | const extFiles = files.filter((file: string) => path.extname(file) === `.${extension}`); | |
| 67 | if (extFiles.length === 0) { | |
| 68 | throw new Error(`Unable to find any ${extension} files.`); | |
| 69 | } | |
afc46a73Jimmy Thomson10 years ago | 70 | return extFiles; |
bc7a32ceJimmy Thomson10 years ago | 71 | }); |
| 72 | } | |
3fb37ad5unknown10 years ago | 73 | } |