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91 lines
3.0 KiB
TypeScript
91 lines
3.0 KiB
TypeScript
/*---------------------------------------------------------------------------------------------
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* Copyright (c) Microsoft Corporation. All rights reserved.
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* Licensed under the MIT License. See License.txt in the project root for license information.
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*--------------------------------------------------------------------------------------------*/
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import { spawnSync } from 'child_process';
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import { createHash } from 'crypto';
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import { tmpdir } from 'os';
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import * as fs from 'fs';
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import * as https from 'https';
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import * as path from 'path';
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import { sysrootInfo } from './sysroots';
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import { ArchString } from './types';
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// Based on https://source.chromium.org/chromium/chromium/src/+/main:build/linux/sysroot_scripts/install-sysroot.py.
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const URL_PREFIX = 'https://msftelectron.blob.core.windows.net';
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const URL_PATH = 'sysroots/toolchain';
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function getSha(filename: fs.PathLike): string {
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const hash = createHash('sha1');
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// Read file 1 MB at a time
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const fd = fs.openSync(filename, 'r');
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const buffer = Buffer.alloc(1024 * 1024);
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let position = 0;
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let bytesRead = 0;
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while ((bytesRead = fs.readSync(fd, buffer, 0, buffer.length, position)) === buffer.length) {
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hash.update(buffer);
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position += bytesRead;
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}
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hash.update(buffer.slice(0, bytesRead));
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return hash.digest('hex');
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}
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type SysrootDictEntry = {
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Sha1Sum: string;
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SysrootDir: string;
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Tarball: string;
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};
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export async function getSysroot(arch: ArchString): Promise<string> {
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const sysrootDict: SysrootDictEntry = sysrootInfo[arch];
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const tarballFilename = sysrootDict['Tarball'];
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const tarballSha = sysrootDict['Sha1Sum'];
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const sysroot = path.join(tmpdir(), sysrootDict['SysrootDir']);
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const url = [URL_PREFIX, URL_PATH, tarballSha, tarballFilename].join('/');
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const stamp = path.join(sysroot, '.stamp');
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if (fs.existsSync(stamp) && fs.readFileSync(stamp).toString() === url) {
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return sysroot;
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}
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console.log(`Installing Debian ${arch} root image: ${sysroot}`);
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fs.rmSync(sysroot, { recursive: true, force: true });
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fs.mkdirSync(sysroot);
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const tarball = path.join(sysroot, tarballFilename);
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console.log(`Downloading ${url}`);
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let downloadSuccess = false;
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for (let i = 0; i < 3 && !downloadSuccess; i++) {
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await new Promise<void>((c) => {
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https.get(url, (res) => {
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const chunks: Uint8Array[] = [];
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res.on('data', (chunk) => {
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chunks.push(chunk);
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});
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res.on('end', () => {
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fs.writeFileSync(tarball, Buffer.concat(chunks));
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downloadSuccess = true;
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c();
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});
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}).on('error', (err) => {
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console.error('Encountered an error during the download attempt: ' + err.message);
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c();
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});
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});
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}
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if (!downloadSuccess) {
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throw new Error('Failed to download ' + url);
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}
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const sha = getSha(tarball);
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if (sha !== tarballSha) {
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throw new Error(`Tarball sha1sum is wrong. Expected ${tarballSha}, actual ${sha}`);
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}
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const proc = spawnSync('tar', ['xf', tarball, '-C', sysroot]);
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if (proc.status) {
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throw new Error('Tarball extraction failed with code ' + proc.status);
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}
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fs.rmSync(tarball);
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fs.writeFileSync(stamp, url);
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return sysroot;
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}
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