[Plugin] install plugin's depedencies

Signed-off-by: Eric Wang <skygragon@gmail.com>

lib/commands/plugin.js

@@ -2,7 +2,6 @@ var fs = require('fs');
 var path = require('path');
 
 var h = require('../helper');
-var chalk = require('../chalk');
 var log = require('../log');
 var Plugin = require('../plugin');
 var session = require('../session');
@@ -38,17 +37,33 @@ var cmd = {
   }
 };
 
+function install(name) {
+  // copy to plugins folder
+  var newname = path.join(Plugin.dir, path.basename(name));
+  var src = fs.createReadStream(name);
+  src.pipe(fs.createWriteStream(newname));
+  src.on('end', function() {
+    log.debug('copied to ' + newname);
+
+    // install dependencies
+    var plugin = require(path.relative(__dirname, newname));
+    if (plugin.deps.length === 0) return;
+
+    var cmd = 'npm install --save ' + plugin.deps.join(' ');
+    log.debug(cmd);
+    require('child_process').execSync(cmd, {
+      cwd: path.resolve(__dirname, '../..')
+    });
+  });
+}
+
 cmd.handler = function(argv) {
   session.argv = argv;
   var name = argv.name;
 
   if (argv.install) {
-    if (!name || !fs.existsSync(name))
-      return log.error('Plugin not found!');
-
-    var newName = path.join(Plugin.dir, path.basename(name));
-    fs.createReadStream(name).pipe(fs.createWriteStream(newName));
-    return;
+    if (!name || !fs.existsSync(name)) return log.error('Plugin not found!');
+    return install(name);
   }
 
   var plugins = Plugin.plugins;
@@ -65,8 +80,7 @@ cmd.handler = function(argv) {
     return;
   }
 
-  if (plugins.length === 0)
-    return log.error('Plugin not found!');
+  if (plugins.length === 0) return log.error('Plugin not found!');
 
   var plugin = plugins[0];
   var oldname = Plugin.fullpath(plugin.file);

lib/plugin.js

@@ -6,12 +6,13 @@ var h = require('./helper');
 var config = require('./config');
 var log = require('./log');
 
-function Plugin(id, name, ver, desc) {
+function Plugin(id, name, ver, desc, deps) {
   this.id = id;
   this.name = name;
   this.ver = ver || 'default';
   this.desc = desc;
   this.enabled = true;
+  this.deps = deps || [];
 }
 
 Plugin.prototype.init = function() {