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vscode-react-native/src/common/node

src/common/node/fileSystem.ts

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3fb37ad5unknown10 years ago1// Copyright (c) Microsoft Corporation. All rights reserved.
2// Licensed under the MIT license. See LICENSE file in the project root for details.
3
aab2095edigeff10 years ago4import * as nodeFs from "fs";
bc7a32ceJimmy Thomson10 years ago5import * as path from "path";
3fb37ad5unknown10 years ago6import * as Q from "q";
7
8export class FileSystem {
aab2095edigeff10 years ago9private fs: typeof nodeFs;
10
11constructor({ fs = nodeFs } = {}) {
12this.fs = fs;
13}
3fb37ad5unknown10 years ago14
15public ensureDirectory(dir: string): Q.Promise<void> {
aab2095edigeff10 years ago16return Q.nfcall(this.fs.stat, dir).then((stat: nodeFs.Stats): void => {
3fb37ad5unknown10 years ago17if (stat.isDirectory()) {
18return;
19}
b3a793eeNisheet Jain10 years ago20throw new Error(`Expected ${dir} to be a directory`);
d24fea86Joshua Skelton10 years ago21}, (err: Error & { code?: string }): Q.Promise<any> => {
3fb37ad5unknown10 years ago22if (err && err.code === "ENOENT") {
aab2095edigeff10 years ago23return Q.nfcall(this.fs.mkdir, dir);
3fb37ad5unknown10 years ago24}
b3a793eeNisheet Jain10 years ago25throw err;
3fb37ad5unknown10 years ago26});
27}
28
29public ensureFileWithContents(file: string, contents: string): Q.Promise<void> {
aab2095edigeff10 years ago30return Q.nfcall(this.fs.stat, file).then((stat: nodeFs.Stats) => {
3fb37ad5unknown10 years ago31if (!stat.isFile()) {
32throw new Error(`Expected ${file} to be a file`);
33}
1e812de2dlebu10 years ago34
35return this.readFile(file).then(existingContents => {
36if (contents !== existingContents) {
37return this.writeFile(file, contents);
38}
39});
d24fea86Joshua Skelton10 years ago40}, (err: Error & { code?: string }): Q.Promise<any> => {
3fb37ad5unknown10 years ago41if (err && err.code === "ENOENT") {
aab2095edigeff10 years ago42return Q.nfcall(this.fs.writeFile, file, contents);
3fb37ad5unknown10 years ago43}
b3a793eeNisheet Jain10 years ago44throw err;
3fb37ad5unknown10 years ago45});
46}
47
d24fea86Joshua Skelton10 years ago48/**
49* Helper function to check if a file or directory exists
50*/
51public existsSync(filename: string) {
3fb37ad5unknown10 years ago52try {
aab2095edigeff10 years ago53this.fs.statSync(filename);
3fb37ad5unknown10 years ago54return true;
55} catch (error) {
56return false;
57}
58}
59
2b1090f9Joshua Skelton10 years ago60/**
61* Helper (asynchronous) function to check if a file or directory exists
62*/
63public exists(filename: string): Q.Promise<boolean> {
aab2095edigeff10 years ago64return Q.nfcall(this.fs.stat, filename)
b031edc7digeff10 years ago65.then(function() {
2b1090f9Joshua Skelton10 years ago66return Q.resolve(true);
67})
68.catch(function(err) {
69return Q.resolve(false);
51769beaJoshua Skelton10 years ago70});
2b1090f9Joshua Skelton10 years ago71}
72
db80cd4eJimmy Thomson10 years ago73/**
74* Helper async function to read the contents of a directory
75*/
76public readDir(directory: string): Q.Promise<string[]> {
aab2095edigeff10 years ago77return Q.nfcall<string[]>(this.fs.readdir, directory);
db80cd4eJimmy Thomson10 years ago78}
79
d24fea86Joshua Skelton10 years ago80/**
81* Helper (synchronous) function to create a directory recursively
82*/
3d2b4b71Joshua Skelton10 years ago83public makeDirectoryRecursiveSync(dirPath: string): void {
d24fea86Joshua Skelton10 years ago84let parentPath = path.dirname(dirPath);
85if (!this.existsSync(parentPath)) {
3d2b4b71Joshua Skelton10 years ago86this.makeDirectoryRecursiveSync(parentPath);
d24fea86Joshua Skelton10 years ago87}
88
aab2095edigeff10 years ago89this.fs.mkdirSync(dirPath);
d24fea86Joshua Skelton10 years ago90}
91
92/**
93* Helper function to asynchronously copy a file
94*/
2b1090f9Joshua Skelton10 years ago95public copyFile(from: string, to: string, encoding?: string): Q.Promise<void> {
d8231ba2Joshua Skelton10 years ago96let deferred: Q.Deferred<void> = Q.defer<void>();
aab2095edigeff10 years ago97let destFile: nodeFs.WriteStream = this.fs.createWriteStream(to, { encoding: encoding });
98let srcFile: nodeFs.ReadStream = this.fs.createReadStream(from, { encoding: encoding });
d24fea86Joshua Skelton10 years ago99destFile.on("finish", function(): void {
2b1090f9Joshua Skelton10 years ago100deferred.resolve(void 0);
d24fea86Joshua Skelton10 years ago101});
102
103destFile.on("error", function(e: Error): void {
104deferred.reject(e);
105});
106
107srcFile.on("error", function(e: Error): void {
108deferred.reject(e);
109});
110
111srcFile.pipe(destFile);
112return deferred.promise;
113}
114
3fb37ad5unknown10 years ago115public deleteFileIfExistsSync(filename: string) {
d24fea86Joshua Skelton10 years ago116if (this.existsSync(filename)) {
aab2095edigeff10 years ago117this.fs.unlinkSync(filename);
3fb37ad5unknown10 years ago118}
119}
120
5d4d4de0digeff10 years ago121public readFile(filename: string, encoding: string = "utf8"): Q.Promise<string> {
aab2095edigeff10 years ago122return Q.nfcall<string>(this.fs.readFile, filename, encoding);
3fb37ad5unknown10 years ago123}
124
4677921cdigeff10 years ago125public writeFile(filename: string, data: any): Q.Promise<void> {
aab2095edigeff10 years ago126return Q.nfcall<void>(this.fs.writeFile, filename, data);
4677921cdigeff10 years ago127}
bc7a32ceJimmy Thomson10 years ago128
bc96b26bJimmy Thomson10 years ago129public unlink(filename: string): Q.Promise<void> {
aab2095edigeff10 years ago130return Q.nfcall<void>(this.fs.unlink, filename);
bc96b26bJimmy Thomson10 years ago131}
132
4e7a6f0edlebu10 years ago133public mkDir(p: string): Q.Promise<void> {
bc6696cbdigeff10 years ago134return Q.nfcall<void>(this.fs.mkdir, p);
135}
136
ed2f4750digeff10 years ago137public stat(path: string): Q.Promise<nodeFs.Stats> {
138return Q.nfcall<nodeFs.Stats>(this.fs.stat, path);
bc6696cbdigeff10 years ago139}
140
141public directoryExists(directoryPath: string): Q.Promise<boolean> {
142return this.stat(directoryPath).then(stats => {
143return stats.isDirectory();
144}).catch(reason => {
145return reason.code === "ENOENT"
146? false
147: Q.reject<boolean>(reason);
148});
149}
150
50241c19digeff10 years ago151
152/**
153* Delete 'dirPath' if it's an empty folder. If not fail.
154*
155* @param {dirPath} path to the folder
156* @returns {void} Nothing
157*/
bc6696cbdigeff10 years ago158public rmdir(dirPath: string): Q.Promise<void> {
159return Q.nfcall<void>(this.fs.rmdir, dirPath);
4e7a6f0edlebu10 years ago160}
161
e7f5d062Joshua Skelton10 years ago162/**
163* Recursively copy 'source' to 'target' asynchronously
164*
165* @param {string} source Location to copy from
166* @param {string} target Location to copy to
167* @returns {Q.Promise} A promise which is fulfilled when the copy completes, and is rejected on error
168*/
169public copyRecursive(source: string, target: string): Q.Promise<void> {
aab2095edigeff10 years ago170return Q.nfcall<nodeFs.Stats>(this.fs.stat, source).then(stats => {
e7f5d062Joshua Skelton10 years ago171if (stats.isDirectory()) {
172return this.exists(target).then(exists => {
173if (!exists) {
aab2095edigeff10 years ago174return Q.nfcall<void>(this.fs.mkdir, target);
e7f5d062Joshua Skelton10 years ago175}
176})
b031edc7digeff10 years ago177.then(() => {
aab2095edigeff10 years ago178return Q.nfcall<string[]>(this.fs.readdir, source);
b031edc7digeff10 years ago179})
180.then(contents => {
181Q.all(contents.map((childPath: string): Q.Promise<void> => {
182return this.copyRecursive(path.join(source, childPath), path.join(target, childPath));
183}));
184});
e7f5d062Joshua Skelton10 years ago185} else {
186return this.copyFile(source, target);
187}
188});
189}
190
4e7a6f0edlebu10 years ago191public removePathRecursivelyAsync(p: string): Q.Promise<void> {
e7f5d062Joshua Skelton10 years ago192return this.exists(p).then(exists => {
4e7a6f0edlebu10 years ago193if (exists) {
aab2095edigeff10 years ago194return Q.nfcall<nodeFs.Stats>(this.fs.stat, p).then((stats: nodeFs.Stats) => {
4e7a6f0edlebu10 years ago195if (stats.isDirectory()) {
aab2095edigeff10 years ago196return Q.nfcall<string[]>(this.fs.readdir, p).then((childPaths: string[]) => {
4e7a6f0edlebu10 years ago197let result = Q<void>(void 0);
198childPaths.forEach(childPath =>
199result = result.then<void>(() => this.removePathRecursivelyAsync(path.join(p, childPath))));
200return result;
201}).then(() =>
aab2095edigeff10 years ago202Q.nfcall<void>(this.fs.rmdir, p));
4e7a6f0edlebu10 years ago203} else {
204/* file */
aab2095edigeff10 years ago205return Q.nfcall<void>(this.fs.unlink, p);
4e7a6f0edlebu10 years ago206}
207});
208}
209});
210}
211
8ab8eac0dlebu10 years ago212public removePathRecursivelySync(p: string): void {
aab2095edigeff10 years ago213if (this.fs.existsSync(p)) {
214let stats = this.fs.statSync(p);
8ab8eac0dlebu10 years ago215if (stats.isDirectory()) {
aab2095edigeff10 years ago216let contents = this.fs.readdirSync(p);
8ab8eac0dlebu10 years ago217contents.forEach(childPath =>
218this.removePathRecursivelySync(path.join(p, childPath)));
aab2095edigeff10 years ago219this.fs.rmdirSync(p);
8ab8eac0dlebu10 years ago220} else {
221/* file */
aab2095edigeff10 years ago222this.fs.unlinkSync(p);
8ab8eac0dlebu10 years ago223}
224}
225}
3fb37ad5unknown10 years ago226}