core: output synopsis with command [GH-2249]

lib/vagrant/cli.rb

@@ -55,13 +55,16 @@ module Vagrant
 
         # Add the available subcommands as separators in order to print them
         # out as well.
-        keys = []
-        Vagrant.plugin("2").manager.commands.each do |key, _|
-          keys << key
+        commands = {}
+        longest = 0
+        Vagrant.plugin("2").manager.commands.each do |key, klass|
+          key = key.to_s
+          commands[key] = klass.synopsis
+          longest = key.length if key.length > longest
         end
 
-        keys.sort.each do |key|
-          o.separator "     #{key}"
+        commands.keys.sort.each do |key|
+          o.separator "     #{key.ljust(longest+2)} #{commands[key]}"
         end
 
         o.separator ""

lib/vagrant/plugin/v2/command.rb

@@ -9,6 +9,14 @@ module Vagrant
       class Command
         include Util::SafePuts
 
+        # This should return a brief (60 characters or less) synopsis of what
+        # this command does. It will be used in the output of the help.
+        #
+        # @return [String]
+        def self.synopsis
+          ""
+        end
+
         def initialize(argv, env)
           @argv = argv
           @env  = env

plugins/commands/box/command/root.rb

@@ -4,6 +4,10 @@ module VagrantPlugins
   module CommandBox
     module Command
       class Root < Vagrant.plugin("2", :command)
+        def self.synopsis
+          "manages boxes: installation, removal, etc."
+        end
+
         def initialize(argv, env)
           super
 

plugins/commands/destroy/command.rb

@@ -1,6 +1,10 @@
 module VagrantPlugins
   module CommandDestroy
     class Command < Vagrant.plugin("2", :command)
+      def self.synopsis
+        "stops and deletes all traces of the vagrant machine"
+      end
+
       def execute
         options = {}
         options[:force] = false

plugins/commands/halt/command.rb

@@ -3,6 +3,10 @@ require 'optparse'
 module VagrantPlugins
   module CommandHalt
     class Command < Vagrant.plugin("2", :command)
+      def self.synopsis
+        "stops the vagrant machine"
+      end
+
       def execute
         options = {}
         options[:force] = false

plugins/commands/help/command.rb

@@ -3,6 +3,10 @@ require 'optparse'
 module VagrantPlugins
   module CommandHelp
     class Command < Vagrant.plugin("2", :command)
+      def self.synopsis
+        "shows the help for a subcommand"
+      end
+
       def execute
         return @env.cli([]) if @argv.empty?
         @env.cli([@argv[0], "-h"])

plugins/commands/init/command.rb

@@ -5,11 +5,13 @@ require 'vagrant/util/template_renderer'
 module VagrantPlugins
   module CommandInit
     class Command < Vagrant.plugin("2", :command)
-      def execute
-        options = {}
+      def self.synopsis
+        "initializes a new Vagrant environment by creating a Vagrantfile"
+      end
 
-        opts = OptionParser.new do |opts|
-          opts.banner = "Usage: vagrant init [box-name] [box-url]"
+      def execute
+        opts = OptionParser.new do |o|
+          o.banner = "Usage: vagrant init [box-name] [box-url]"
         end
 
         # Parse the options
@@ -34,7 +36,7 @@ module VagrantPlugins
 
         # Success, exit status 0
         0
-       end
+      end
     end
   end
 end

plugins/commands/package/command.rb

@@ -3,6 +3,10 @@ require 'optparse'
 module VagrantPlugins
   module CommandPackage
     class Command < Vagrant.plugin("2", :command)
+      def self.synopsis
+        "packages a running vagrant environment into a box"
+      end
+
       def execute
         options = {}
 

plugins/commands/plugin/command/root.rb

@@ -4,6 +4,10 @@ module VagrantPlugins
   module CommandPlugin
     module Command
       class Root < Vagrant.plugin("2", :command)
+        def self.synopsis
+          "manages plugins: install, uninstall, update, etc."
+        end
+
         def initialize(argv, env)
           super
 

plugins/commands/provision/command.rb

@@ -3,6 +3,10 @@ require 'optparse'
 module VagrantPlugins
   module CommandProvision
     class Command < Vagrant.plugin("2", :command)
+      def self.synopsis
+        "provisions the vagrant machine"
+      end
+
       def execute
         options = {}
         options[:provision_types] = nil

plugins/commands/reload/command.rb

@@ -11,6 +11,10 @@ module VagrantPlugins
       # to this.
       include VagrantPlugins::CommandUp::StartMixins
 
+      def self.synopsis
+        "restarts vagrant machine, loads new Vagrantfile configuration"
+      end
+
       def execute
         options = {}
         options[:provision_ignore_sentinel] = false

plugins/commands/resume/command.rb

@@ -3,6 +3,10 @@ require 'optparse'
 module VagrantPlugins
   module CommandResume
     class Command < Vagrant.plugin("2", :command)
+      def self.synopsis
+        "resume a suspended vagrant machine"
+      end
+
       def execute
         opts = OptionParser.new do |o|
           o.banner = "Usage: vagrant resume [vm-name]"

plugins/commands/ssh/command.rb

@@ -3,6 +3,10 @@ require 'optparse'
 module VagrantPlugins
   module CommandSSH
     class Command < Vagrant.plugin("2", :command)
+      def self.synopsis
+        "connects to machine via SSH"
+      end
+
       def execute
         options = {}
 

plugins/commands/ssh_config/command.rb

@@ -7,6 +7,10 @@ module VagrantPlugins
     class Command < Vagrant.plugin("2", :command)
       include Vagrant::Util::SafePuts
 
+      def self.synopsis
+        "outputs OpenSSH valid configuration to connect to the machine"
+      end
+
       def execute
         options = {}
 

plugins/commands/status/command.rb

@@ -3,6 +3,10 @@ require 'optparse'
 module VagrantPlugins
   module CommandStatus
     class Command < Vagrant.plugin("2", :command)
+      def self.synopsis
+        "outputs status of the vagrant machine"
+      end
+
       def execute
         opts = OptionParser.new do |o|
           o.banner = "Usage: vagrant status [machine-name]"

plugins/commands/suspend/command.rb

@@ -3,6 +3,10 @@ require 'optparse'
 module VagrantPlugins
   module CommandSuspend
     class Command < Vagrant.plugin("2", :command)
+      def self.synopsis
+        "suspends the machine"
+      end
+
       def execute
         opts = OptionParser.new do |o|
           o.banner = "Usage: vagrant suspend [vm-name]"

plugins/commands/up/command.rb

@@ -9,6 +9,10 @@ module VagrantPlugins
     class Command < Vagrant.plugin("2", :command)
       include StartMixins
 
+      def self.synopsis
+        "starts and provisions the vagrant environment"
+      end
+
       def execute
         options = {}
         options[:destroy_on_error] = true