139 lines
2.9 KiB
JavaScript
139 lines
2.9 KiB
JavaScript
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var EventEmitter = require('events').EventEmitter;
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var inherits = require('util').inherits;
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var spawn = require('child_process').spawn;
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var path = require('path');
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var Promise = require('native-or-bluebird');
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var platform = require('os').platform();
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function Exeq(commands) {
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EventEmitter.call(this);
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this.commands = commands || [];
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this.cwd = '';
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this.results = [];
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var instance = new Promise(this.run.bind(this));
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instance.q = this;
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return instance;
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}
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inherits(Exeq, EventEmitter);
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Exeq.prototype.run = function(resolve, reject) {
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var that = this;
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var stdout = new Buffer('');
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var stderr = new Buffer('');
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// done!
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if (this.commands.length === 0) {
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this.emit('done', this.results);
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resolve(this.results);
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return;
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}
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var cmdString = this.commands.shift();
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var parsed = parseCommand(cmdString);
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var s = this.proc = spawn(parsed.cmd, parsed.args, {
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cwd: this.cwd
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});
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s.stdout.pipe(process.stdout);
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s.stdout.on('data', function(data) {
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that.emit('stdout', data);
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stdout += data.toString();
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});
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s.stderr.pipe(process.stderr);
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s.stderr.on('data', function(data) {
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that.emit('stderr', data);
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stderr += data.toString();
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});
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s.on('close', function(code, signal) {
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var reason;
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if (code) {
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reason = {
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code: code,
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stdout: stdout.toString(),
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stderr: stderr.toString()
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};
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that.emit('failed', reason);
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return reject(reason);
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}
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that.results.push({
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cmd: cmdString,
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stdout: stdout.toString(),
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stderr: stderr.toString()
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});
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if (that.killed) {
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reason = {
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code: code,
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stderr: that.results.map(function(result) {
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return result.stdout.toString();
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}).join('') + 'Process has been killed.'
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};
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if (signal) {
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reason.errno = signal;
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}
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that.emit('killed', reason);
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return reject(reason);
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}
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// cd /path/to
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// change cwd to /path/to
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if (parsed.changeCwd) {
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that.cwd = path.resolve(that.cwd, parsed.changeCwd);
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}
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that.run(resolve, reject);
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});
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};
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Exeq.prototype.kill = function() {
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if (this.proc) {
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try {
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this.proc.kill('SIGTERM');
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this.killed = true;
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} catch (e) {
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if (e.errno != 'ESRCH') {
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throw (e);
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}
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}
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}
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};
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module.exports = function() {
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var cmds = [], args = Array.prototype.slice.call(arguments);
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args.forEach(function(arg) {
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if (Array.isArray(arg)) {
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cmds = cmds.concat(arg);
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} else {
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cmds.push(arg);
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}
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});
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return new Exeq(cmds);
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};
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function parseCommand(cmd) {
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cmd = cmd.trim();
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var command = (platform === 'win32' ? 'cmd.exe' : 'sh');
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var args = (platform === 'win32' ? ['/s', '/c'] : ['-c']);
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var changeCwd;
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// change cwd for "cd /path/to"
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if (/^cd\s+/.test(cmd)) {
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changeCwd = cmd.replace(/^cd\s+/, '');
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}
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return {
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cmd: command,
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args: args.concat([cmd]),
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changeCwd: changeCwd
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};
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}
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