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Forked from millermedeiros/example.js
Last active July 24, 2016 21:48
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execute multiple shell commands in series on node.js
var shell = require('./shellHelper');
// execute a single shell command
shell.exec('touch file1', function(err) {
console.log('created "file1"');
});
// execute multiple commands in series
shell.series([
'touch file1',
'touch file2',
'touch file3'
], function(err) {
console.log('created multiple files');
});
// spawn a child process and execute shell command
// borrowed from https://github.com/mout/mout/ build script
// author Miller Medeiros
// released under MIT License
// version: 0.1.0 (2013/02/01)
// execute a single shell command where "cmd" is a string
exports.exec = function(cmd, cb) {
// this would be way easier on a shell/bash script :P
var child_process = require('child_process');
var parts = cmd.split(/\s+/g);
var p = child_process.spawn(parts[0], parts.slice(1), {stdio: 'inherit'});
p.on('exit', function(code) {
var err = null;
if (code) {
err = new Error('command "'+ cmd +'" exited with wrong status code "'+ code +'"');
err.code = code;
err.cmd = cmd;
}
if (cb) cb(err);
});
};
// execute multiple commands in series
// this could be replaced by any flow control lib
exports.series = function(cmds, cb){
var execNext = function(){
exports.exec(cmds.shift(), function(err){
if (err) {
cb(err);
} else {
if (cmds.length) execNext();
else cb(null);
}
});
};
execNext();
};
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