48 lines
1.4 KiB
JavaScript
48 lines
1.4 KiB
JavaScript
/**
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* Process spawning — always explicit argument arrays, never shell strings.
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*/
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import { spawn } from 'child_process';
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/**
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* Spawn a process and stream its output to stdout/stderr.
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* @param {string} cmd
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* @param {string[]} args
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* @param {{ dryRun?: boolean }} opts
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* @returns {Promise<void>}
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*/
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export async function run(cmd, args, { dryRun = false } = {}) {
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console.log(`$ ${[cmd, ...args].join(' ')}`);
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if (dryRun) return;
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return new Promise((resolve, reject) => {
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const child = spawn(cmd, args, { stdio: 'inherit' });
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child.on('error', reject);
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child.on('close', code => {
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if (code === 0) resolve();
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else reject(new Error(`${cmd} exited with code ${code}`));
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});
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});
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}
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/**
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* Spawn a process and capture stdout as a string.
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* stderr is inherited (shown to user). Never used in dry-run context.
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* @param {string} cmd
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* @param {string[]} args
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* @returns {Promise<string>}
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*/
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export async function capture(cmd, args) {
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console.log(`$ ${[cmd, ...args].join(' ')}`);
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return new Promise((resolve, reject) => {
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const child = spawn(cmd, args, { stdio: ['inherit', 'pipe', 'inherit'] });
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const chunks = [];
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child.stdout.on('data', chunk => chunks.push(chunk));
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child.on('error', reject);
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child.on('close', code => {
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if (code === 0) resolve(Buffer.concat(chunks).toString('utf8'));
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else reject(new Error(`${cmd} exited with code ${code}`));
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});
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});
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}
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