Yogu/site-manager

var Task = require('../task.js');
var Q = require('q');
var exec = require('child_process').exec;

function ShellTask(command, cwd) {
    Task.call(this);
    this.name = "exec " + command + (cwd ? " (in " + cwd + ")" : '');
    this.command = command;
    this.cwd = cwd;
}

ShellTask.prototype = Object.create(Task.prototype);

ShellTask.prototype.perform = function() {
    var options = {};
    if (this.cwd)
        options.cwd = this.cwd;
    options.maxBuffer = 1024 * 1024 * 10;
    
    var deferred = Q.defer();
    
    exec(this.command, options, function(error, stdout, stderr) {
        result = { stdout: stdout, stderr: stderr };

        if (stdout)
            this.doLog(stdout);
        if (stderr)
            this.doLog(stderr);
        
        if (error)
            deferred.reject(error);
        else
            deferred.resolve(result);
    }.bind(this));
    
    return deferred.promise;
};

ShellTask.escape = function(cmd) {
    return '"'+cmd.replace(/(["'$`\\])/g,'\\$1')+'"';
};

ShellTask.exec = function(cmd, cwd) {
    var task = new ShellTask(cmd, cwd);
    task.start();
    return task;
};

module.exports = ShellTask;