Added help command. Usage `pod help [COMMAND]`

lib/cocoapods/command.rb

@@ -16,6 +16,7 @@ module Pod
     require 'cocoapods/command/search'
     require 'cocoapods/command/setup'
     require 'cocoapods/command/spec'
+    require 'cocoapods/command/help'
     require 'cocoapods/command/inter_process_communication'
 
     self.abstract_command = true

lib/cocoapods/command/help.rb

+module Pod
+  class Command
+    class Help < Command
+      self.summary = 'Show help for the given command'
+      self.arguments = '[COMMAND]'
+
+      def self.parse(argv)
+        command_needs_help = [argv.shift_argument, '--help']
+        argv.empty? ? super : Pod::Command.parse(command_needs_help)
+      end
+
+      def run
+        help!
+      end
+    end
+  end
+end
\ No newline at end of file

master @ ee564d9d

-Subproject commit e54bfaa54110629cbb7495a5cdbb237b1fffe8f8
+Subproject commit ee564d9da8878957e7b77cac987d9601eb04eca5

spec/functional/command/help_spec.rb

+require File.expand_path('../../../spec_helper', __FILE__)
+
+module Pod
+  describe "Command::Help" do
+    extend SpecHelper::Command
+
+    it "invokes the right command with --help flag" do
+      command = command('help', 'push')
+      command.should.be.instance_of Pod::Command::Push
+      lambda { command.validate! }.should.raise CLAide::Help
+    end
+
+    it "raises help! if no other command is passed" do
+      lambda { command('help').validate! }.should.raise CLAide::Help
+    end
+
+    it "shows the right usage" do
+      Pod::Command::Help.arguments.should.equal '[COMMAND]'
+    end
+    
+  end
+end
\ No newline at end of file

spec/unit/command_spec.rb

@@ -3,6 +3,7 @@ require File.expand_path('../../spec_helper', __FILE__)
 module Pod
   describe Command do
     it "returns the proper command class" do
+      Command.parse(%w{ help        }).should.be.instance_of Command::Help
       Command.parse(%w{ install     }).should.be.instance_of Command::Install
       Command.parse(%w{ list        }).should.be.instance_of Command::List
       Command.parse(%w{ outdated    }).should.be.instance_of Command::Outdated