forked from snxraven/autoinstallers
89 lines
2.5 KiB
JavaScript
89 lines
2.5 KiB
JavaScript
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const exec = require('child_process').exec
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/**
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* does the given object have the given property
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* @param {object} obj object to check.
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* @param {string} prop property to check for.
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* @return Boolean
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*/
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function hasProp (obj, prop) {
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return obj.hasOwnProperty(prop)
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}
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/**
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* is this a string please sir?
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* @param {string} str string (or is it?) to check.
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* @return Boolean
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*/
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function isString (str) {
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return (typeof str === 'string' || str instanceof String)
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}
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/**
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* wrapper for child_process.exec()
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* @param {string} command command line command to run.
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* @param {object} options cmd-promise options.
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* @param {object} execOptions exec() options object as outlined in the node docs.
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* @return Promise
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*/
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function runCommand (command, options, execOptions) {
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// defaults
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if (!options) { options = {} }
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if (!execOptions) { execOptions = {} }
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// resolve to the child process?
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const returnProcess = hasProp(options, 'returnProcess') ? options.returnProcess : false
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return new Promise((resolve, reject) => {
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if (returnProcess) {
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// resolve to the child process, don't wait for the output
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resolve(exec(command, execOptions))
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} else {
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// resolve to the output, using the callback
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exec(command, execOptions, (error, stdout, stderr) => {
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if (error) { return reject(error) }
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resolve({ stdout, stderr })
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})
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}
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})
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}
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/**
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* run one or many commands
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* @param {string} commands command line command(s) string to run.
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* @param {object} options options object as outlined in the node docs.
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* @return Promise
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*/
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function cmdPromise (commands, options, execOptions) {
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// make sure the command is a string
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if (!isString(commands)) {
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return Promise.reject(new Error('Command not a string.'))
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}
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// do we have multiple lines?
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if (commands.indexOf('\n') > -1) {
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// split by new lines
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const arrSplit = commands.split(/\n/g)
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// remove empty array elements
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const arrFiltered = arrSplit.filter(ele => ele.length)
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// trim each array element
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const arrTrimmed = arrFiltered.map(ele => ele.trim())
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// array of command promises
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const arrOut = arrTrimmed.map(command => {
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return runCommand(command, options, execOptions)
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})
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// multiple lines, return an array of outs
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return Promise.all(arrOut)
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} else {
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// one line, run it
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return runCommand(commands, options, execOptions)
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}
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}
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module.exports = cmdPromise
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