Runner: Docker-Adapter gehärtet (R10)
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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ClaudeandClaude Sonnet 5.5 committed
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@@ -1,49 +1,71 @@
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// Docker-Adapter: baut `docker run`-Argumente mit festem Sicherheitsprofil und kapselt die docker-CLI (spawn, nie Shell).
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import { spawn } from 'node:child_process';
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import { mkdtempSync, writeFileSync, rmSync } from 'node:fs';
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import { tmpdir } from 'node:os';
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import { join } from 'node:path';
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const SUB_RE = /^[a-z0-9-]{1,63}$/;
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const ENV_NAME_RE = /^[A-Z_][A-Z0-9_]*$/;
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const NAME_RE = /^[a-zA-Z0-9][a-zA-Z0-9_.-]{0,127}$/;
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const NETWORK = 'preview-sandbox';
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const NETWORK = 'preview-sandbox'; // fest (R10), kein Parameter
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const IMAGES = ['node:20', 'oven/bun:1'];
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const MEMORIES = ['1g', '512m'];
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const MAX_LINE = 64 * 1024;
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// Feste, unkritische Umgebung im Container (R9): Caches landen im gemounteten Cache-Verzeichnis.
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const FIXED_ENV = ['HOME=/cache/home', 'npm_config_cache=/cache/npm', 'COREPACK_HOME=/cache/corepack'];
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const FIXED_NAMES = new Set(FIXED_ENV.map((e) => e.split('=')[0]));
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const FIXED_NAMES = new Set(['HOME', 'COREPACK_HOME']);
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function securityArgs({ memory, network, name, workDir, cacheDir, env }) {
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if (name !== undefined && !NAME_RE.test(name)) throw new Error('Ungültiger Containername');
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const args = [];
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if (name !== undefined) args.push('--name', name);
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args.push(
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// Host-Pfad: absolut, keine Sonderzeichen für -v, keine '..'-Segmente, unterhalb der Wurzel (R10).
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function checkPath(p, root, what) {
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if (typeof p !== 'string' || typeof root !== 'string' || !p.startsWith('/') || /[:,\0\n\r]/.test(p)
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|| p.split('/').includes('..') || !(p === root || p.startsWith(root.replace(/\/+$/, '') + '/'))) {
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throw new Error(`Ungültiger Pfad (${what})`);
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}
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}
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function checkEnv(env) {
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for (const [k, v] of Object.entries(env || {})) {
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if (!ENV_NAME_RE.test(k) || FIXED_NAMES.has(k)) throw new Error(`Ungültiger Variablenname: ${k}`);
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if (/[\0\n\r]/.test(String(v))) throw new Error(`Ungültiger Wert für ${k}`);
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}
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}
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function securityArgs({ image, memory, name, workDir, cacheDir, workRoot, cacheRoot, env }) {
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if (!IMAGES.includes(image)) throw new Error('Image nicht erlaubt');
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if (!MEMORIES.includes(memory)) throw new Error('Ungültiges Speicherlimit');
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if (typeof name !== 'string' || !NAME_RE.test(name)) throw new Error('Ungültiger Containername');
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checkPath(workDir, workRoot, 'workDir');
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checkPath(cacheDir, cacheRoot, 'cacheDir');
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checkEnv(env); // Werte selbst laufen nie über die Kommandozeile, siehe run() (--env-file)
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const args = [
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'--name', name,
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'--init',
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'--memory', memory,
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'--memory-swap', memory,
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'--cpus', '1',
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'--pids-limit', '512',
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'--cap-drop', 'ALL',
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'--security-opt', 'no-new-privileges',
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'--user', '1000:1000',
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'--network', network,
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'--network', NETWORK,
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'-v', `${workDir}:/work`,
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'-v', `${cacheDir}:/cache`,
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'-w', '/work',
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);
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];
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for (const e of FIXED_ENV) args.push('-e', e);
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for (const [k, v] of Object.entries(env || {})) {
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if (!ENV_NAME_RE.test(k) || FIXED_NAMES.has(k)) throw new Error(`Ungültiger Variablenname: ${k}`);
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if (String(v).includes('\0')) throw new Error(`Ungültiger Wert für ${k}`);
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args.push('-e', k); // nur der Name; der Wert reist über die Umgebung des docker-Prozesses
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}
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return args;
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}
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export function buildRunArgs({ image = 'node:20', name, workDir, cacheDir, env, cmd = [], memory = '1g', network = NETWORK }) {
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return ['run', '--rm', ...securityArgs({ memory, network, name, workDir, cacheDir, env }), image, ...cmd];
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// name ist Pflicht (Aufrufer: 'preview-build-<runId>'), damit ein Zeitlimit den Container sicher entfernen kann.
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export function buildRunArgs({ image = 'node:20', name, workDir, cacheDir, workRoot, cacheRoot, env, cmd = [], memory = '1g' }) {
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return ['run', '--rm', ...securityArgs({ image, memory, name, workDir, cacheDir, workRoot, cacheRoot, env }), image, ...cmd];
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}
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export function devRunArgs({ image = 'node:20', sub, workDir, cacheDir, env, cmd = [], memory = '512m', network = NETWORK }) {
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export function devRunArgs({ image = 'node:20', sub, workDir, cacheDir, workRoot, cacheRoot, env, cmd = [], memory = '512m' }) {
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if (typeof sub !== 'string' || !SUB_RE.test(sub)) throw new Error('Ungültige Subdomain');
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return [
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'run', '-d', '--restart', 'no', '--label', `webklar.preview=${sub}`,
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...securityArgs({ memory, network, name: `preview-dev-${sub}`, workDir, cacheDir, env }),
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...securityArgs({ image, memory, name: `preview-dev-${sub}`, workDir, cacheDir, workRoot, cacheRoot, env }),
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image, ...cmd,
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];
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}
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@@ -56,8 +78,8 @@ function lineSplitter(onLine) {
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push(chunk) {
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buf += chunk;
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const parts = buf.split(/\r?\n/);
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buf = parts.pop();
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for (const l of parts) onLine(l);
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buf = parts.pop().slice(0, MAX_LINE);
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for (const l of parts) onLine(l.length > MAX_LINE ? l.slice(0, MAX_LINE) : l);
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},
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flush() { if (buf !== '') onLine(buf); buf = ''; },
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};
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@@ -65,19 +87,53 @@ function lineSplitter(onLine) {
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const checkName = (n) => { if (typeof n !== 'string' || !NAME_RE.test(n)) throw new Error('Ungültiger Containername'); };
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export function createDocker({ exec = spawnDocker, baseEnv = process.env } = {}) {
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// Minimale Basis-Umgebung: die Runner-Geheimnisse (Tokens) dürfen nie in docker/Container gelangen.
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// Name aus dem Optionsteil (vor dem Image) – nie aus dem Container-Befehl.
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function optionName(args) {
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const end = args.findIndex((a) => IMAGES.includes(a));
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const opts = end === -1 ? args : args.slice(0, end);
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const i = opts.indexOf('--name');
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return i !== -1 && NAME_RE.test(opts[i + 1] || '') ? opts[i + 1] : null;
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}
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export function createDocker({ exec = spawnDocker, baseEnv = process.env, envDir = tmpdir(), rmCapMs = 5000 } = {}) {
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// CLI-Umgebung NUR aus PATH/DOCKER_HOST des Runners; Job-Variablen gelangen ausschließlich per --env-file (R10).
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const minimalBase = {};
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for (const k of ['PATH', 'DOCKER_HOST']) if (baseEnv[k] !== undefined) minimalBase[k] = baseEnv[k];
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function writeEnvFile(env) {
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checkEnv(env);
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const dir = mkdtempSync(join(envDir, 'preview-env-'));
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const file = join(dir, 'env');
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writeFileSync(file, Object.entries(env).map(([k, v]) => `${k}=${v}\n`).join(''), { mode: 0o600 });
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return { file, cleanup: () => { try { rmSync(dir, { recursive: true, force: true }); } catch { /* egal */ } } };
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}
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// docker rm -f mit kurzer Obergrenze abwarten.
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function forceRemove(name) {
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return new Promise((resolve) => {
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const t = setTimeout(resolve, rmCapMs);
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try {
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const c = exec(['rm', '-f', name], { env: minimalBase });
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c.on?.('error', () => { clearTimeout(t); resolve(); });
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c.on?.('close', () => { clearTimeout(t); resolve(); });
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} catch { clearTimeout(t); resolve(); }
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});
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}
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// onLine(zeile, 'out' | 'err')
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function run(args, { env = {}, timeoutMs, onLine } = {}) {
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for (const [k, v] of Object.entries(env)) {
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if (String(v).includes('\0')) return Promise.reject(new Error(`Ungültiger Wert für ${k}`));
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let envFile = null;
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let finalArgs = args;
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if (Object.keys(env).length > 0) {
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if (args[0] !== 'run') return Promise.reject(new Error('Variablen nur für docker run'));
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try { envFile = writeEnvFile(env); } catch (e) { return Promise.reject(e); }
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finalArgs = ['run', '--env-file', envFile.file, ...args.slice(1)];
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}
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return new Promise((resolve, reject) => {
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const child = exec(args, { env: { ...minimalBase, ...env } });
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const split = lineSplitter((l) => { if (onLine) onLine(l); });
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const split2 = lineSplitter((l) => { if (onLine) onLine(l); });
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let child;
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try { child = exec(finalArgs, { env: { ...minimalBase } }); } catch (e) { envFile?.cleanup(); reject(e); return; }
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const split = lineSplitter((l) => { if (onLine) onLine(l, 'out'); });
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const split2 = lineSplitter((l) => { if (onLine) onLine(l, 'err'); });
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child.stdout?.setEncoding?.('utf8');
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child.stderr?.setEncoding?.('utf8');
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child.stdout?.on('data', (d) => split.push(String(d)));
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@@ -88,28 +144,26 @@ export function createDocker({ exec = spawnDocker, baseEnv = process.env } = {})
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if (done) return;
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done = true;
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clearTimeout(timer);
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envFile?.cleanup();
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split.flush(); split2.flush();
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resolve(res);
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};
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child.on('error', (e) => { if (!done) { done = true; clearTimeout(timer); reject(e); } });
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child.on('error', (e) => { if (!done) { done = true; clearTimeout(timer); envFile?.cleanup(); reject(e); } });
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child.on('close', (code) => finish({ code: code ?? 1 }));
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if (timeoutMs > 0) {
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timer = setTimeout(() => {
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timer = setTimeout(async () => {
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try { child.kill('SIGKILL'); } catch { /* schon beendet */ }
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const i = args.indexOf('--name');
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if (i !== -1 && args[i + 1]) {
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try { exec(['rm', '-f', args[i + 1]], { env: minimalBase })?.on?.('error', () => {}); } catch { /* egal */ }
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}
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const name = optionName(args);
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if (name) await forceRemove(name);
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finish({ code: 124 });
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}, timeoutMs);
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}
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});
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}
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// Kurze docker-Aufrufe: stdout einsammeln.
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async function capture(args) {
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const out = [];
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const r = await run(args, { onLine: (l) => out.push(l) });
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const r = await run(args, { onLine: (l, st) => { if (st === 'out') out.push(l); } });
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return { code: r.code, lines: out };
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}
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@@ -118,7 +172,7 @@ export function createDocker({ exec = spawnDocker, baseEnv = process.env } = {})
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async ps(label) {
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const { code, lines } = await capture(['ps', '--filter', `label=${label}`, '--format', '{{.Names}}']);
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if (code !== 0) throw new Error(`docker ps fehlgeschlagen (${code})`);
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return lines.map((l) => l.trim()).filter(Boolean);
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return lines.map((l) => l.trim()).filter((l) => NAME_RE.test(l));
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},
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async rm(name) { checkName(name); return capture(['rm', '-f', name]); },
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async stop(name) { checkName(name); return capture(['rm', '-f', name]); },
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+71
-20
@@ -1,43 +1,52 @@
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import test from 'node:test';
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import assert from 'node:assert/strict';
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import { readFileSync, existsSync, statSync } from 'node:fs';
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import { EventEmitter } from 'node:events';
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import { PassThrough } from 'node:stream';
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import { buildRunArgs, devRunArgs, createDocker, spawnDocker } from '../src/docker.js';
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const base = { image: 'node:20', workDir: '/srv/w/build/1', cacheDir: '/srv/c/repo', cmd: ['npm', 'ci'] };
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const base = { image: 'node:20', name: 'preview-build-1', workDir: '/srv/w/build/1', cacheDir: '/srv/c/repo', workRoot: '/srv/w', cacheRoot: '/srv/c', cmd: ['npm', 'ci'] };
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const pair = (args, flag, val) => args.some((a, i) => a === flag && args[i + 1] === val);
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test('buildRunArgs: komplettes Sicherheitsprofil', () => {
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const a = buildRunArgs(base);
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assert.deepEqual(a.slice(0, 2), ['run', '--rm']);
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assert.ok(a.includes('--init'));
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for (const [f, v] of [['--memory', '1g'], ['--cpus', '1'], ['--pids-limit', '512'], ['--cap-drop', 'ALL'], ['--security-opt', 'no-new-privileges'], ['--user', '1000:1000'], ['--network', 'preview-sandbox'], ['-w', '/work'], ['-v', '/srv/w/build/1:/work'], ['-v', '/srv/c/repo:/cache'], ['-e', 'HOME=/cache/home'], ['-e', 'npm_config_cache=/cache/npm'], ['-e', 'COREPACK_HOME=/cache/corepack']]) {
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for (const [f, v] of [['--memory', '1g'], ['--memory-swap', '1g'], ['--name', 'preview-build-1'], ['--cpus', '1'], ['--pids-limit', '512'], ['--cap-drop', 'ALL'], ['--security-opt', 'no-new-privileges'], ['--user', '1000:1000'], ['--network', 'preview-sandbox'], ['-w', '/work'], ['-v', '/srv/w/build/1:/work'], ['-v', '/srv/c/repo:/cache'], ['-e', 'HOME=/cache/home'], ['-e', 'npm_config_cache=/cache/npm'], ['-e', 'COREPACK_HOME=/cache/corepack']]) {
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assert.ok(pair(a, f, v), `${f} ${v}`);
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}
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assert.equal(a.filter((x) => x === '-v').length, 2);
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assert.deepEqual(a.slice(-3), ['node:20', 'npm', 'ci']);
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});
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test('buildRunArgs: Variablen nur als Name, Werte nie in args', () => {
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const a = buildRunArgs({ ...base, env: { API_KEY: 'geheim-wert', X: 'abc' }, memory: '1g' });
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assert.ok(pair(a, '-e', 'API_KEY') && pair(a, '-e', 'X'));
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test('buildRunArgs: Variablenwerte nie in args, ungültige Werte/Namen abgelehnt', () => {
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const a = buildRunArgs({ ...base, env: { API_KEY: 'geheim-wert' } });
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assert.ok(!a.join(' ').includes('geheim-wert'));
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});
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test('buildRunArgs: ungültiger Name/NUL/Name-Validierung', () => {
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assert.throws(() => buildRunArgs({ ...base, env: { 'a b': '1' } }));
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assert.throws(() => buildRunArgs({ ...base, env: { A: 'x\0y' } }));
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assert.throws(() => buildRunArgs({ ...base, env: { A: 'x\ny' } }));
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assert.throws(() => buildRunArgs({ ...base, env: { HOME: 'x' } }));
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assert.throws(() => buildRunArgs({ ...base, name: '-x' }));
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});
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test('buildRunArgs: memory/name optional', () => {
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const a = buildRunArgs({ ...base, name: 'job-1', memory: '2g' });
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assert.ok(pair(a, '--memory', '2g') && pair(a, '--name', 'job-1'));
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test('buildRunArgs: Name Pflicht, Memory/Image Allowlist, Network fest', () => {
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assert.throws(() => buildRunArgs({ ...base, name: undefined }));
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assert.throws(() => buildRunArgs({ ...base, name: '-x' }));
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assert.throws(() => buildRunArgs({ ...base, memory: '64g' }));
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assert.throws(() => buildRunArgs({ ...base, image: 'evil/img' }));
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assert.ok(buildRunArgs({ ...base, image: 'oven/bun:1', memory: '512m' }));
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assert.ok(pair(buildRunArgs({ ...base, network: 'host' }), '--network', 'preview-sandbox'));
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});
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test('Pfade: absolut, unter Wurzel, keine Sonderzeichen', () => {
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for (const workDir of ['rel/x', '/etc', '/srv/w/../x', '/srv/w/a:b', '/srv/w/a,b', '/srv/w/a\nb', '/srv/wx/y', '/srv/w/a\0b', '/srv/w/x/../../etc']) {
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assert.throws(() => buildRunArgs({ ...base, workDir }), workDir);
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}
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assert.throws(() => buildRunArgs({ ...base, cacheDir: '/srv/w/x' }));
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assert.throws(() => buildRunArgs({ ...base, workRoot: undefined }));
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});
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test('devRunArgs: detached, Name, Label, ohne --rm, 512m', () => {
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const a = devRunArgs({ ...base, sub: 'demo-1', cmd: ['npm', 'run', 'dev'] });
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const a = devRunArgs({ ...base, sub: 'demo-1', memory: undefined, cmd: ['npm', 'run', 'dev'] });
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assert.ok(!a.includes('--rm'));
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assert.ok(a.includes('-d'));
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assert.ok(pair(a, '--name', 'preview-dev-demo-1'));
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@@ -60,12 +69,19 @@ function fakeChild() {
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return c;
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}
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test('run: streamt Zeilen, liefert Exit-Code, Umgebung minimal + Job-Env', async () => {
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test('run: streamt Zeilen, CLI-Umgebung nur minimalBase, Werte nur in env-file (0600, danach gelöscht)', async () => {
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const calls = [];
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let content; let mode; let filePath;
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const child = fakeChild();
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const docker = createDocker({ exec: (args, opts) => { calls.push({ args, opts }); return child; }, baseEnv: { PATH: '/bin', DOCKER_HOST: 'unix:///x', PREVIEW_RUNNER_TOKEN: 'leak' } });
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const exec = (args, opts) => {
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calls.push({ args, opts });
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const i = args.indexOf('--env-file');
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filePath = args[i + 1]; content = readFileSync(filePath, 'utf8'); mode = statSync(filePath).mode & 0o777;
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return child;
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};
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const docker = createDocker({ exec, baseEnv: { PATH: '/bin', DOCKER_HOST: 'unix:///x', PREVIEW_RUNNER_TOKEN: 'leak' } });
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const lines = [];
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const p = docker.run(['run', '-e', 'K'], { env: { K: 'v' }, onLine: (l) => lines.push(l) });
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const p = docker.run(['run', '--rm', 'img'], { env: { K: 'v', DOCKER_HOST: 'x', PATH: 'y' }, onLine: (l) => lines.push(l) });
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child.stdout.write('eins\nzw');
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child.stderr.write('fehler\n');
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child.stdout.write('ei\n');
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@@ -74,27 +90,62 @@ test('run: streamt Zeilen, liefert Exit-Code, Umgebung minimal + Job-Env', async
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child.emit('close', 3);
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assert.deepEqual(await p, { code: 3 });
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assert.deepEqual(lines.sort(), ['eins', 'fehler', 'zwei']);
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assert.deepEqual(calls[0].opts.env, { PATH: '/bin', DOCKER_HOST: 'unix:///x', K: 'v' });
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assert.deepEqual(calls[0].opts.env, { PATH: '/bin', DOCKER_HOST: 'unix:///x' });
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assert.equal(content, 'K=v\nDOCKER_HOST=x\nPATH=y\n');
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assert.equal(mode, 0o600);
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assert.ok(!calls[0].args.join(' ').includes('=v'));
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assert.equal(calls[0].args[0], 'run');
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assert.equal(existsSync(filePath), false);
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});
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||||
|
||||
test('run: NUL im Wert ⇒ Fehler vor dem Start', async () => {
|
||||
test('run: NUL/Newline im Wert ⇒ Fehler vor dem Start', async () => {
|
||||
let n = 0;
|
||||
const docker = createDocker({ exec: () => { n++; return fakeChild(); } });
|
||||
await assert.rejects(docker.run(['run'], { env: { A: 'x\0' } }));
|
||||
await assert.rejects(docker.run(['run'], { env: { A: 'x\ny' } }));
|
||||
assert.equal(n, 0);
|
||||
});
|
||||
|
||||
test('run: Zeitlimit ⇒ Kill, docker rm -f, code 124', async () => {
|
||||
const calls = [];
|
||||
const child = fakeChild();
|
||||
const docker = createDocker({ exec: (args) => { calls.push(args); return calls.length === 1 ? child : Object.assign(fakeChild(), { __rm: true }); } });
|
||||
const p = docker.run(['run', '--name', 'job-9', 'img'], { timeoutMs: 20 });
|
||||
const docker = createDocker({ rmCapMs: 30, exec: (args) => { calls.push(args); return calls.length === 1 ? child : Object.assign(fakeChild(), { __rm: true }); } });
|
||||
const p = docker.run(['run', '--name', 'job-9', 'node:20', 'x', '--name', 'fake'], { timeoutMs: 20 });
|
||||
const r = await p;
|
||||
assert.deepEqual(r, { code: 124 });
|
||||
assert.deepEqual(child.killed, ['SIGKILL']);
|
||||
assert.deepEqual(calls[1], ['rm', '-f', 'job-9']);
|
||||
});
|
||||
|
||||
test('Zeitlimit: Name nur aus Optionsteil, ohne Namen kein rm', async () => {
|
||||
const calls = [];
|
||||
const docker = createDocker({ rmCapMs: 10, exec: (args) => { calls.push(args); return fakeChild(); } });
|
||||
assert.deepEqual(await docker.run(['run', 'node:20', 'x', '--name', 'fake'], { timeoutMs: 10 }), { code: 124 });
|
||||
assert.equal(calls.length, 1);
|
||||
});
|
||||
|
||||
test('ps: nur stdout, nur gültige Namen', async () => {
|
||||
const exec = () => {
|
||||
const c = fakeChild();
|
||||
setImmediate(() => { c.stderr.write('Warnung: foo\n'); c.stdout.write('preview-dev-a\n'); c.stdout.end(); c.stderr.end(); c.emit('close', 0); });
|
||||
return c;
|
||||
};
|
||||
assert.deepEqual(await createDocker({ exec }).ps('webklar.preview'), ['preview-dev-a']);
|
||||
});
|
||||
|
||||
test('lineSplitter: überlange Zeilen werden gekappt', async () => {
|
||||
const child = fakeChild();
|
||||
const docker = createDocker({ exec: () => child });
|
||||
const lines = [];
|
||||
const p = docker.run(['ps'], { onLine: (l) => lines.push(l) });
|
||||
child.stdout.write('a'.repeat(200000) + '\n');
|
||||
child.stdout.end(); child.stderr.end();
|
||||
await new Promise((r) => setImmediate(r));
|
||||
child.emit('close', 0);
|
||||
await p;
|
||||
assert.ok(lines[0].length <= 65536);
|
||||
});
|
||||
|
||||
test('ps/stop/rm', async () => {
|
||||
const calls = [];
|
||||
const exec = (args) => {
|
||||
|
||||
Reference in new issue
Block a user