Support a few more gem parameters - take 2

plugins/commands/plugin/action/install_gem.rb

@@ -16,15 +16,23 @@ module VagrantPlugins
 
         def call(env)
           plugin_name = env[:plugin_name]
+          prerelease = env[:plugin_prerelease]
+          version = env[:plugin_version]
 
           # Install the gem
+          plugin_name_label = plugin_name
+          plugin_name_label += ' --prerelease' if prerelease
+          plugin_name_label += " --version \"#{version}\"" if version
           env[:ui].info(I18n.t("vagrant.commands.plugin.installing",
-                               :name => plugin_name))
+                               :name => plugin_name_label))
           installed_gems = env[:gem_helper].with_environment do
-            installer = Gem::DependencyInstaller.new(:document => [])
+            # Override the list of sources by the ones set on the cmd-line if any
+            Gem.sources = env[:plugin_sources] if env[:plugin_sources]
+
+            installer = Gem::DependencyInstaller.new(:document => [], :prerelease => prerelease)
 
             begin
-              installer.install(plugin_name)
+              installer.install(plugin_name, version)
             rescue Gem::GemNotFoundException
               raise Vagrant::Errors::PluginInstallNotFound,
                 :name => plugin_name

plugins/commands/plugin/command/install.rb

@@ -17,6 +17,19 @@ module VagrantPlugins
                  "The name of the entry point file for loading the plugin.") do |entry_point|
               options[:entry_point] = entry_point
             end
+            o.on("--plugin-prerelease",
+                 "Install a prereleased version of the plugin") do |plugin_prerelease|
+              options[:plugin_prerelease] = plugin_prerelease
+            end
+            o.on("--plugin-version PLUGIN_VERSION", String,
+                 "Install a specific version of the plugin") do |plugin_version|
+              options[:plugin_version] = plugin_version
+            end
+            o.on("--plugin-source PLUGIN_SOURCE", String,
+                 "Add a ruby gem repository") do |plugin_source|
+              options[:plugin_sources] = [] if !options[:plugin_sources]
+              options[:plugin_sources] << plugin_source
+            end
           end
 
           # Parse the options
@@ -27,6 +40,9 @@ module VagrantPlugins
           # Install the gem
           action(Action.action_install, {
             :plugin_entry_point => options[:entry_point],
+            :plugin_prerelease => options[:plugin_prerelease],
+            :plugin_version => options[:plugin_version],
+            :plugin_sources => options[:plugin_sources],
             :plugin_name        => argv[0]
           })