vagrant help <foo> works [GH-1578]

CHANGELOG.md

@@ -1,5 +1,9 @@
 ## 1.2.5 (unreleased)
 
+FEATURES:
+
+  - `vagrant help <command>` now works. [GH-1578]
+
 IMPROVEMENTS:
 
   - Remote commands that fail will now show the stdout/stderr of the

plugins/commands/help/command.rb

@@ -0,0 +1,12 @@
+require 'optparse'
+
+module VagrantPlugins
+  module CommandHelp
+    class Command < Vagrant.plugin("2", :command)
+      def execute
+        return @env.cli([]) if @argv.empty?
+        @env.cli([@argv[0], "-h"])
+      end
+    end
+  end
+end

plugins/commands/help/plugin.rb

@@ -0,0 +1,17 @@
+require "vagrant"
+
+module VagrantPlugins
+  module CommandHelp
+    class Plugin < Vagrant.plugin("2")
+      name "help command"
+      description <<-DESC
+      The `help` command shows help for the given command.
+      DESC
+
+      command("help") do
+        require File.expand_path("../command", __FILE__)
+        Command
+      end
+    end
+  end
+end