49 lines
888 B
JavaScript
49 lines
888 B
JavaScript
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'use strict'
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var spawn = require('child_process').spawn
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/**
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* Spawn a binary and read its stdout.
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* @param {String} cmd
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* @param {String[]} args
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* @param {Function} done(err, stdout)
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*/
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function run (cmd, args, options, done) {
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if (typeof options === 'function') {
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done = options
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options = undefined
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}
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var executed = false
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var ch = spawn(cmd, args, options)
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var stdout = ''
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var stderr = ''
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ch.stdout.on('data', function (d) {
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stdout += d.toString()
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})
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ch.stderr.on('data', function (d) {
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stderr += d.toString()
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})
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ch.on('error', function (err) {
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if (executed) return
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executed = true
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done(new Error(err))
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})
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ch.on('close', function (code, signal) {
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if (executed) return
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executed = true
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if (stderr) {
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return done(new Error(stderr))
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}
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done(null, stdout, code)
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})
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}
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module.exports = run
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