56 lines
1.3 KiB
Plaintext
56 lines
1.3 KiB
Plaintext
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// @flow
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'use strict';
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const crossSpawn = require('cross-spawn');
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const onExit = require('signal-exit');
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const EventEmitter = require('events');
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const ChildProcessPromise = require('./promise');
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const activeProcesses = new Set();
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onExit(() => {
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for (let child of activeProcesses) {
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child.kill('SIGTERM');
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}
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});
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function spawn(
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cmd /*: string */,
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args /*:: ?: Array<string> */,
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opts /*:: ?: child_process$spawnOpts */
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) /*: ChildProcessPromise */ {
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return new ChildProcessPromise((resolve, reject, events) => {
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let child = crossSpawn(cmd, args, opts);
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let stdout = Buffer.from('');
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let stderr = Buffer.from('');
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activeProcesses.add(child);
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if (child.stdout) {
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child.stdout.on('data', data => {
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stdout = Buffer.concat([stdout, data]);
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events.emit('stdout', data);
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});
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}
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if (child.stderr) {
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child.stderr.on('data', data => {
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stderr = Buffer.concat([stderr, data]);
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events.emit('stderr', data);
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});
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}
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child.on('error', err => {
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activeProcesses.delete(child);
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reject(err);
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});
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child.on('close', code => {
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activeProcesses.delete(child);
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resolve({ code, stdout, stderr });
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});
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});
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}
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module.exports = spawn;
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module.exports.ChildProcessPromise = ChildProcessPromise;
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