Add "-m/--template" option to Rails generator to apply template to ge…

…nerated application.

Signed-off-by: Pratik Naik <pratiknaik@gmail.com>

railties/CHANGELOG

@@ -1,5 +1,48 @@
 *2.3.0 [Edge]*
 
+* Add "-m/--template" option to Rails generator to apply a template to the generated application. [Jeremy McAnally]
+
+    This has been extracted from rg - http://github.com/jeremymcanally/rg
+
+    Example:
+
+        # template.rb
+
+        # Install plugins from git or svn
+        plugin "will-paginate", :git => "git://github.com/mislav/will_paginate.git"
+        plugin "old-restful-auth", :svn => "http://svn.techno-weenie.net/projects/plugins/restful_authentication/"
+
+        # Add gems to environment.rb
+        gem "jeremymcanally-context"
+        gem "bluecloth"
+
+        # Vendor file. Data in a string or...
+        vendor("borrowed.rb", <<CODE
+          def helpful_method
+            do_something_helpful_here
+          end
+        CODE
+
+        # ...file data from block return value.
+        # #initializer creates a new initializer file
+        initializer("crypto.rb") do
+          salt = "--#{Time.now}--#{rand}--#{srand(Time.now.to_i)}"
+
+          "SPECIAL_SALT = '#{salt}'"
+        end
+
+    Usage:
+
+      To use a template, provide a file path or URL:
+
+      1. Using a local file :
+
+        rails <application name> -m /path/to/my/template.rb
+
+      2. Or directly from a URL :
+
+        rails <application name> --template=http://gist.github.com/31208.txt
+
 * Extracted the process scripts (inspector, reaper, spawner) into the plugin irs_process_scripts [DHH]
 
 * Changed Rails.root to return a Pathname object (allows for Rails.root.join('app', 'controllers') => "#{RAILS_ROOT}/app/controllers") #1482 [Damian Janowski/?]

railties/bin/rails

@@ -8,6 +8,7 @@ if %w(--version -v).include? ARGV.first
 end
 
 freeze   = ARGV.any? { |option| %w(--freeze -f).include?(option) }
+
 app_path = ARGV.first
 
 require File.dirname(__FILE__) + '/../lib/rails_generator'

railties/lib/rails_generator/base.rb

@@ -154,6 +154,9 @@ def destination_path(relative_destination)
         File.join(destination_root, relative_destination)
       end
 
+      def after_generate
+      end
+
       protected
         # Convenience method for generator subclasses to record a manifest.
         def record

railties/lib/rails_generator/commands.rb

@@ -40,6 +40,7 @@ class Base < DelegateClass(Rails::Generator::Base)
         # Replay action manifest.  RewindBase subclass rewinds manifest.
         def invoke!
           manifest.replay(self)
+          after_generate
         end
 
         def dependency(generator_name, args, runtime_options = {})

railties/lib/rails_generator/generators/applications/app/app_generator.rb

@@ -1,4 +1,5 @@
 require 'rbconfig'
+require File.dirname(__FILE__) + '/template_runner'
 require 'digest/md5' 
 require 'active_support/secure_random'
 
@@ -37,6 +38,12 @@ def manifest
     end
   end
 
+  def after_generate
+    if options[:template]
+      Rails::TemplateRunner.new(@destination_root, options[:template])
+    end
+  end
+
   protected
     def banner
       "Usage: #{$0} /path/to/your/app [options]"
@@ -60,6 +67,11 @@ def add_options!(opt)
       opt.on("-f", "--freeze",
             "Freeze Rails in vendor/rails from the gems generating the skeleton",
             "Default: false") { |v| options[:freeze] = v }
+
+      opt.on("-m", "--template=path", String,
+            "Use an application template that lives at path (can be a filesystem path or URL).",
+            "Default: (none)") { |v| options[:template] = v }
+
     end
 
 

railties/lib/rails_generator/generators/applications/app/scm/git.rb

@@ -0,0 +1,16 @@
+module Rails
+  class Git < Scm
+    def self.clone(repos, branch=nil)
+      `git clone #{repos}`
+
+      if branch
+        `cd #{repos.split('/').last}/`
+        `git checkout #{branch}`
+      end
+    end
+
+    def self.run(command)
+      `git #{command}`
+    end
+  end
+end

railties/lib/rails_generator/generators/applications/app/scm/scm.rb

@@ -0,0 +1,8 @@
+module Rails
+  class Scm
+    private
+      def self.hash_to_parameters(hash)
+        hash.collect { |key, value| "--#{key} #{(value.kind_of?(String) ? value : "")}"}.join(" ")
+      end
+  end
+end

railties/lib/rails_generator/generators/applications/app/scm/svn.rb

@@ -0,0 +1,7 @@
+module Rails
+  class Svn < Scm
+    def self.checkout(repos, branch = nil)
+      `svn checkout #{repos}/#{branch || "trunk"}`
+    end
+  end
+end