microsoft/vscode-react-native
Publicmirrored fromhttps://github.com/microsoft/vscode-react-nativeAvailable
src/common/node/fileSystem.ts
199lines · modecode
| 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"; |
| 5 | import * as path from "path"; |
| 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 | } |
| 15 | throw new Error(`Expected ${dir} to be a directory`); |
| 16 | }, (err: Error & { code?: string }): Q.Promise<any> => { |
| 17 | if (err && err.code === "ENOENT") { |
| 18 | return Q.nfcall(fs.mkdir, dir); |
| 19 | } |
| 20 | throw err; |
| 21 | }); |
| 22 | } |
| 23 | |
| 24 | public ensureFileWithContents(file: string, contents: string): Q.Promise<void> { |
| 25 | return Q.nfcall(fs.stat, file).then((stat: fs.Stats) => { |
| 26 | if (!stat.isFile()) { |
| 27 | throw new Error(`Expected ${file} to be a file`); |
| 28 | } |
| 29 | |
| 30 | return this.readFile(file).then(existingContents => { |
| 31 | if (contents !== existingContents) { |
| 32 | return this.writeFile(file, contents); |
| 33 | } |
| 34 | }); |
| 35 | }, (err: Error & { code?: string }): Q.Promise<any> => { |
| 36 | if (err && err.code === "ENOENT") { |
| 37 | return Q.nfcall(fs.writeFile, file, contents); |
| 38 | } |
| 39 | throw err; |
| 40 | }); |
| 41 | } |
| 42 | |
| 43 | /** |
| 44 | * Helper function to check if a file or directory exists |
| 45 | */ |
| 46 | public existsSync(filename: string) { |
| 47 | try { |
| 48 | fs.statSync(filename); |
| 49 | return true; |
| 50 | } catch (error) { |
| 51 | return false; |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * Helper (asynchronous) function to check if a file or directory exists |
| 57 | */ |
| 58 | public exists(filename: string): Q.Promise<boolean> { |
| 59 | return Q.nfcall(fs.stat, filename) |
| 60 | .then(function() { |
| 61 | return Q.resolve(true); |
| 62 | }) |
| 63 | .catch(function(err) { |
| 64 | return Q.resolve(false); |
| 65 | }); |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * Helper (synchronous) function to create a directory recursively |
| 70 | */ |
| 71 | public makeDirectoryRecursiveSync(dirPath: string): void { |
| 72 | let parentPath = path.dirname(dirPath); |
| 73 | if (!this.existsSync(parentPath)) { |
| 74 | this.makeDirectoryRecursiveSync(parentPath); |
| 75 | } |
| 76 | |
| 77 | fs.mkdirSync(dirPath); |
| 78 | } |
| 79 | |
| 80 | /** |
| 81 | * Helper function to asynchronously copy a file |
| 82 | */ |
| 83 | public copyFile(from: string, to: string, encoding?: string): Q.Promise<void> { |
| 84 | let deferred: Q.Deferred<void> = Q.defer<void>(); |
| 85 | let destFile: fs.WriteStream = fs.createWriteStream(to, { encoding: encoding }); |
| 86 | let srcFile: fs.ReadStream = fs.createReadStream(from, { encoding: encoding }); |
| 87 | destFile.on("finish", function(): void { |
| 88 | deferred.resolve(void 0); |
| 89 | }); |
| 90 | |
| 91 | destFile.on("error", function(e: Error): void { |
| 92 | deferred.reject(e); |
| 93 | }); |
| 94 | |
| 95 | srcFile.on("error", function(e: Error): void { |
| 96 | deferred.reject(e); |
| 97 | }); |
| 98 | |
| 99 | srcFile.pipe(destFile); |
| 100 | return deferred.promise; |
| 101 | } |
| 102 | |
| 103 | public deleteFileIfExistsSync(filename: string) { |
| 104 | if (this.existsSync(filename)) { |
| 105 | fs.unlinkSync(filename); |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | public readFile(filename: string, encoding: string = "utf8"): Q.Promise<string> { |
| 110 | return Q.nfcall<string>(fs.readFile, filename, encoding); |
| 111 | } |
| 112 | |
| 113 | public writeFile(filename: string, data: any): Q.Promise<void> { |
| 114 | return Q.nfcall<void>(fs.writeFile, filename, data); |
| 115 | } |
| 116 | |
| 117 | public unlink(filename: string): Q.Promise<void> { |
| 118 | return Q.nfcall<void>(fs.unlink, filename); |
| 119 | } |
| 120 | |
| 121 | public findFilesByExtension(folder: string, extension: string): Q.Promise<string[]> { |
| 122 | return Q.nfcall(fs.readdir, folder).then((files: string[]) => { |
| 123 | const extFiles = files.filter((file: string) => path.extname(file) === `.${extension}`); |
| 124 | if (extFiles.length === 0) { |
| 125 | throw new Error(`Unable to find any ${extension} files.`); |
| 126 | } |
| 127 | return extFiles; |
| 128 | }); |
| 129 | } |
| 130 | |
| 131 | public mkDir(p: string): Q.Promise<void> { |
| 132 | return Q.nfcall<void>(fs.mkdir, p); |
| 133 | } |
| 134 | |
| 135 | /** |
| 136 | * Recursively copy 'source' to 'target' asynchronously |
| 137 | * |
| 138 | * @param {string} source Location to copy from |
| 139 | * @param {string} target Location to copy to |
| 140 | * @returns {Q.Promise} A promise which is fulfilled when the copy completes, and is rejected on error |
| 141 | */ |
| 142 | public copyRecursive(source: string, target: string): Q.Promise<void> { |
| 143 | return Q.nfcall<fs.Stats>(fs.stat, source).then(stats => { |
| 144 | if (stats.isDirectory()) { |
| 145 | return this.exists(target).then(exists => { |
| 146 | if (!exists) { |
| 147 | return Q.nfcall<void>(fs.mkdir, target); |
| 148 | } |
| 149 | }) |
| 150 | .then(() => { |
| 151 | return Q.nfcall<string[]>(fs.readdir, source); |
| 152 | }) |
| 153 | .then(contents => { |
| 154 | Q.all(contents.map((childPath: string): Q.Promise<void> => { |
| 155 | return this.copyRecursive(path.join(source, childPath), path.join(target, childPath)); |
| 156 | })); |
| 157 | }); |
| 158 | } else { |
| 159 | return this.copyFile(source, target); |
| 160 | } |
| 161 | }); |
| 162 | } |
| 163 | |
| 164 | public removePathRecursivelyAsync(p: string): Q.Promise<void> { |
| 165 | return this.exists(p).then(exists => { |
| 166 | if (exists) { |
| 167 | return Q.nfcall<fs.Stats>(fs.stat, p).then((stats: fs.Stats) => { |
| 168 | if (stats.isDirectory()) { |
| 169 | return Q.nfcall<string[]>(fs.readdir, p).then((childPaths: string[]) => { |
| 170 | let result = Q<void>(void 0); |
| 171 | childPaths.forEach(childPath => |
| 172 | result = result.then<void>(() => this.removePathRecursivelyAsync(path.join(p, childPath)))); |
| 173 | return result; |
| 174 | }).then(() => |
| 175 | Q.nfcall<void>(fs.rmdir, p)); |
| 176 | } else { |
| 177 | /* file */ |
| 178 | return Q.nfcall<void>(fs.unlink, p); |
| 179 | } |
| 180 | }); |
| 181 | } |
| 182 | }); |
| 183 | } |
| 184 | |
| 185 | public removePathRecursivelySync(p: string): void { |
| 186 | if (fs.existsSync(p)) { |
| 187 | let stats = fs.statSync(p); |
| 188 | if (stats.isDirectory()) { |
| 189 | let contents = fs.readdirSync(p); |
| 190 | contents.forEach(childPath => |
| 191 | this.removePathRecursivelySync(path.join(p, childPath))); |
| 192 | fs.rmdirSync(p); |
| 193 | } else { |
| 194 | /* file */ |
| 195 | fs.unlinkSync(p); |
| 196 | } |
| 197 | } |
| 198 | } |
| 199 | } |