add shell command

lib/command/index.js

@@ -0,0 +1,10 @@
+'use strict';
+
+var typesHash = {
+	'shell': require('./shell').ShellCommand
+};
+
+exports.createCommand = function(params) {
+	var Constructor = typesHash[params.type];
+	return new Constructor(params);
+};

lib/command/shell.js

@@ -0,0 +1,25 @@
+'use strict';
+
+var ParentCommand = require('./spawn').SpawnCommand,
+	inherits = require('util').inherits;
+
+function Command(params) {
+	ParentCommand.call(this, params);
+}
+
+exports.ShellCommand = Command;
+
+inherits(Command, ParentCommand);
+
+
+/**
+ * Executes `params.cmd` (e.g. 'echo 1 && echo 2') in `params.shell`
+ * (e.g. '/bin/sh') with `params.options`
+ */
+Command.prototype.run = function(params, callback) {
+	if (!params.shell) return callback(new Error('`shell` is not set'));
+	if (!params.cmd) return callback(new Error('`cmd` is not set'));
+	ParentCommand.prototype.exec.call(this, {
+		cmd: params.shell, args: ['-c', params.cmd], options: params.options
+	}, callback);
+};

lib/utils.js

@@ -0,0 +1,15 @@
+'use strict';
+
+['Function', 'String', 'Number', 'Date', 'RegExp'].forEach(function(name) {
+	exports['is' + name] = function(obj) {
+		return toString.call(obj) == '[object ' + name + ']';
+	};
+});
+
+exports.isObject = function(obj) {
+	return obj === Object(obj);
+};
+
+exports.noop = function() {};
+
+exports.slice = Array.prototype.slice;