code-server/packages/vscode/src/fill/zip.ts

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/*---------------------------------------------------------------------------------------------
* Copyright (c) Microsoft Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
import * as nls from "vs/nls";
import * as fs from "fs";
import * as path from "path";
import * as tarStream from "tar-stream";
import { promisify } from "util";
import { ILogService } from "vs/platform/log/common/log";
import { CancellationToken } from "vs/base/common/cancellation";
import { mkdirp } from "vs/base/node/pfs";
export interface IExtractOptions {
overwrite?: boolean;
/**
* Source path within the ZIP archive. Only the files contained in this
* path will be extracted.
*/
sourcePath?: string;
}
export interface IFile {
path: string;
contents?: Buffer | string;
localPath?: string;
}
export function zip(tarPath: string, files: IFile[]): Promise<string> {
return new Promise<string>((c, e) => {
const pack = tarStream.pack();
const chunks: Buffer[] = [];
const ended = new Promise<Buffer>((res, rej) => {
pack.on("end", () => {
res(Buffer.concat(chunks));
});
});
pack.on("data", (chunk) => {
chunks.push(chunk as Buffer);
});
for (let i = 0; i < files.length; i++) {
const file = files[i];
pack.entry({
name: file.path,
}, file.contents);
}
pack.finalize();
ended.then((buffer) => {
return promisify(fs.writeFile)(tarPath, buffer);
}).then(() => {
c(tarPath);
}).catch((ex) => {
e(ex);
});
});
}
export async function extract(tarPath: string, targetPath: string, options: IExtractOptions = {}, token: CancellationToken): Promise<void> {
const sourcePathRegex = new RegExp(options.sourcePath ? `^${options.sourcePath}` : '');
return new Promise<void>(async (c, e) => {
const buffer = await promisify(fs.readFile)(tarPath);
const extractor = tarStream.extract();
extractor.once('error', e);
extractor.on('entry', (header, stream, next) => {
const rawName = header.name;
const nextEntry = (): void => {
stream.resume();
next();
};
if (token.isCancellationRequested) {
return nextEntry();
}
if (!sourcePathRegex.test(rawName)) {
return nextEntry();
}
const fileName = rawName.replace(sourcePathRegex, '');
const targetFileName = path.join(targetPath, fileName);
if (/\/$/.test(fileName)) {
stream.resume();
mkdirp(targetFileName).then(() => {
next();
}, e);
return;
}
const dirName = path.dirname(fileName);
const targetDirName = path.join(targetPath, dirName);
if (targetDirName.indexOf(targetPath) !== 0) {
e(nls.localize('invalid file', "Error extracting {0}. Invalid file.", fileName));
return nextEntry();
}
mkdirp(targetDirName, void 0, token).then(() => {
const fstream = fs.createWriteStream(targetFileName, { mode: header.mode });
fstream.once('close', () => {
next();
});
fstream.once('error', (err) => {
e(err);
});
stream.pipe(fstream);
stream.resume();
});
});
extractor.once('finish', () => {
c();
});
extractor.write(buffer);
extractor.end();
});
}
export function buffer(tarPath: string, filePath: string): Promise<Buffer> {
return new Promise<Buffer>(async (c, e) => {
let done: boolean = false;
extractAssets(tarPath, new RegExp(filePath), (path: string, data: Buffer) => {
if (path === filePath) {
done = true;
c(data);
}
}).then(() => {
if (!done) {
e("couldnt find asset " + filePath);
}
}).catch((ex) => {
e(ex);
});
});
}
async function extractAssets(tarPath: string, match: RegExp, callback: (path: string, data: Buffer) => void): Promise<void> {
const buffer = await promisify(fs.readFile)(tarPath);
const extractor = tarStream.extract();
let callbackResolve: () => void;
let callbackReject: (ex?) => void;
const complete = new Promise<void>((r, rej) => {
callbackResolve = r;
callbackReject = rej;
});
extractor.once("error", (err) => {
callbackReject(err);
});
extractor.on("entry", (header, stream, next) => {
const name = header.name;
if (match.test(name)) {
extractData(stream).then((data) => {
callback(name, data);
next();
});
stream.resume();
} else {
stream.on("end", () => {
next();
});
stream.resume();
}
});
extractor.on("finish", () => {
callbackResolve();
});
extractor.write(buffer);
extractor.end();
return complete;
}
async function extractData(stream: NodeJS.ReadableStream): Promise<Buffer> {
return new Promise<Buffer>((res, rej) => {
const fileData: Buffer[] = [];
stream.on('data', (data) => fileData.push(data));
stream.on('end', () => {
const fd = Buffer.concat(fileData);
res(fd);
});
stream.on('error', (err) => {
rej(err);
});
});
}