46 lines
1.1 KiB
JavaScript
46 lines
1.1 KiB
JavaScript
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'use strict'
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const execRaw = require('child_process').exec
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/**
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* Promisified child_process.exec
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*
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* @param cmd
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* @param arg
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* @param opts See child_process.exec node docs
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* @param {stream.Writable} opts.stdout If defined, child process stdout will be piped to it.
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* @param {stream.Writable} opts.stderr If defined, child process stderr will be piped to it.
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*
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* @returns {Promise<{ stdout: string, stderr: stderr }>}
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*/
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async function exec(...args) {
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let cmd = args[0]
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let argz = null
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let opts = null
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if (typeof args[1] === 'object' && Array.isArray(args[1])) {
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argz = args[1]
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}
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if (argz === null && typeof args[1] === 'object') {
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opts = args[1]
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} else if (typeof args[2] === 'object') {
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opts = args[2]
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}
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if (opts === null) {
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opts = { maxBuffer : 1024 * 1024 }
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}
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return new Promise((resolve, reject) => {
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const child = execRaw(cmd, opts,
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(err, stdout, stderr) => err ? reject(err) : resolve({
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stdout: stdout,
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stderr: stderr
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}));
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if (opts.stdout) {
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child.stdout.pipe(opts.stdout);
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}
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if (opts.stderr) {
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child.stderr.pipe(opts.stderr);
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}
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});
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}
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module.exports = exec
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