added "install" to command ot install a package and "list"

command to list the installed packages

lib/getjs/commands.js

@@ -1,6 +1,7 @@
 var file = require("file");
 var log = require("getjs/logger").log;
 var WorkingEnv = require("getjs/workingenv").WorkingEnv;
+var Installer = require("getjs/install").Installer;
 
 var Command = function() {
 
@@ -83,3 +84,42 @@ exports.clearrepo.prototype = {
     }
 }
 
+exports.install = function(args) {
+    this.names = args;
+}
+
+exports.install.prototype = {
+    description: "Install packages",
+    run: function(env) {
+        var installer = new Installer(env);
+        var names = this.names;
+        var downloadinfos = [];
+
+        for (var i = 0; i < names.length; i++) {
+            var name = names[i];
+            log.info("Downloading " + name);
+            downloadinfos.push(installer.download(name));
+        }
+
+        for (i = 0; i < downloadinfos.length; i++) {
+            var di = downloadinfos[i];
+            log.info("Installing " + name);
+            installer.install(di.pack, di.packFile, di.sourceFile);
+        }
+    }
+}
+
+exports.list = function(args) {
+
+}
+
+exports.list.prototype = {
+    description: "List installed packages",
+    run: function(env) {
+        var packages = env.getInstalledPackages();
+        for (var name in packages) {
+            var pack = packages[name];
+            log.info(pack.name + " " + pack.version.label);
+        }
+    }
+}