1 files changed, 233 insertions, 0 deletions
diff --git a/railties/lib/rails/vendor/thor-0.12.3/lib/thor/util.rb b/railties/lib/rails/vendor/thor-0.12.3/lib/thor/util.rb
new file mode 100644
index 0000000000..c2aed89ccf
--- /dev/null
+++ b/railties/lib/rails/vendor/thor-0.12.3/lib/thor/util.rb
@@ -0,0 +1,233 @@
+require 'rbconfig'
+
+class Thor
+  module Sandbox #:nodoc:
+  end
+
+  # This module holds several utilities:
+  #
+  # 1) Methods to convert thor namespaces to constants and vice-versa.
+  #
+  #   Thor::Utils.namespace_from_thor_class(Foo::Bar::Baz) #=> "foo:bar:baz"
+  #
+  # 2) Loading thor files and sandboxing:
+  #
+  #   Thor::Utils.load_thorfile("~/.thor/foo")
+  #
+  module Util
+
+    # Receives a namespace and search for it in the Thor::Base subclasses.
+    #
+    # ==== Parameters
+    # namespace<String>:: The namespace to search for.
+    #
+    def self.find_by_namespace(namespace)
+      namespace = "default#{namespace}" if namespace.empty? || namespace =~ /^:/
+
+      Thor::Base.subclasses.find do |klass|
+        klass.namespace == namespace
+      end
+    end
+
+    # Receives a constant and converts it to a Thor namespace. Since Thor tasks
+    # can be added to a sandbox, this method is also responsable for removing
+    # the sandbox namespace.
+    #
+    # This method should not be used in general because it's used to deal with
+    # older versions of Thor. On current versions, if you need to get the
+    # namespace from a class, just call namespace on it.
+    #
+    # ==== Parameters
+    # constant<Object>:: The constant to be converted to the thor path.
+    #
+    # ==== Returns
+    # String:: If we receive Foo::Bar::Baz it returns "foo:bar:baz"
+    #
+    def self.namespace_from_thor_class(constant, remove_default=true)
+      constant = constant.to_s.gsub(/^Thor::Sandbox::/, "")
+      constant = snake_case(constant).squeeze(":")
+      constant.gsub!(/^default/, '') if remove_default
+      constant
+    end
+
+    # Given the contents, evaluate it inside the sandbox and returns the
+    # namespaces defined in the sandbox.
+    #
+    # ==== Parameters
+    # contents<String>
+    #
+    # ==== Returns
+    # Array[Object]
+    #
+    def self.namespaces_in_content(contents, file=__FILE__)
+      old_constants = Thor::Base.subclasses.dup
+      Thor::Base.subclasses.clear
+
+      load_thorfile(file, contents)
+
+      new_constants = Thor::Base.subclasses.dup
+      Thor::Base.subclasses.replace(old_constants)
+
+      new_constants.map!{ |c| c.namespace }
+      new_constants.compact!
+      new_constants
+    end
+
+    # Returns the thor classes declared inside the given class.
+    #
+    def self.thor_classes_in(klass)
+      stringfied_constants = klass.constants.map { |c| c.to_s }
+      Thor::Base.subclasses.select do |subclass|
+        next unless subclass.name
+        stringfied_constants.include?(subclass.name.gsub("#{klass.name}::", ''))
+      end
+    end
+
+    # Receives a string and convert it to snake case. SnakeCase returns snake_case.
+    #
+    # ==== Parameters
+    # String
+    #
+    # ==== Returns
+    # String
+    #
+    def self.snake_case(str)
+      return str.downcase if str =~ /^[A-Z_]+$/
+      str.gsub(/\B[A-Z]/, '_\&').squeeze('_') =~ /_*(.*)/
+      return $+.downcase
+    end
+
+    # Receives a string and convert it to camel case. camel_case returns CamelCase.
+    #
+    # ==== Parameters
+    # String
+    #
+    # ==== Returns
+    # String
+    #
+    def self.camel_case(str)
+      return str if str !~ /_/ && str =~ /[A-Z]+.*/
+      str.split('_').map { |i| i.capitalize }.join
+    end
+
+    # Receives a namespace and tries to retrieve a Thor or Thor::Group class
+    # from it. It first searches for a class using the all the given namespace,
+    # if it's not found, removes the highest entry and searches for the class
+    # again. If found, returns the highest entry as the class name.
+    #
+    # ==== Examples
+    #
+    #   class Foo::Bar < Thor
+    #     def baz
+    #     end
+    #   end
+    #
+    #   class Baz::Foo < Thor::Group
+    #   end
+    #
+    #   Thor::Util.namespace_to_thor_class("foo:bar")     #=> Foo::Bar, nil # will invoke default task
+    #   Thor::Util.namespace_to_thor_class("baz:foo")     #=> Baz::Foo, nil
+    #   Thor::Util.namespace_to_thor_class("foo:bar:baz") #=> Foo::Bar, "baz"
+    #
+    # ==== Parameters
+    # namespace<String>
+    #
+    # ==== Errors
+    # Thor::Error:: raised if the namespace cannot be found.
+    #
+    # Thor::Error:: raised if the namespace evals to a class which does not
+    #               inherit from Thor or Thor::Group.
+    #
+    def self.namespace_to_thor_class_and_task(namespace, raise_if_nil=true)
+      if namespace.include?(?:)
+        pieces = namespace.split(":")
+        task   = pieces.pop
+        klass  = Thor::Util.find_by_namespace(pieces.join(":"))
+      end
+
+      unless klass
+        klass, task = Thor::Util.find_by_namespace(namespace), nil
+      end
+
+      raise Error, "could not find Thor class or task '#{namespace}'" if raise_if_nil && klass.nil?
+      return klass, task
+    end
+
+    # Receives a path and load the thor file in the path. The file is evaluated
+    # inside the sandbox to avoid namespacing conflicts.
+    #
+    def self.load_thorfile(path, content=nil)
+      content ||= File.binread(path)
+
+      begin
+        Thor::Sandbox.class_eval(content, path)
+      rescue Exception => e
+        $stderr.puts "WARNING: unable to load thorfile #{path.inspect}: #{e.message}"
+      end
+    end
+
+    def self.user_home
+      @@user_home ||= if ENV["HOME"]
+        ENV["HOME"]
+      elsif ENV["USERPROFILE"]
+        ENV["USERPROFILE"]
+      elsif ENV["HOMEDRIVE"] && ENV["HOMEPATH"]
+        File.join(ENV["HOMEDRIVE"], ENV["HOMEPATH"])
+      elsif ENV["APPDATA"]
+        ENV["APPDATA"]
+      else
+        begin
+          File.expand_path("~")
+        rescue
+          if File::ALT_SEPARATOR
+            "C:/"
+          else
+            "/"
+          end
+        end
+      end
+    end
+
+    # Returns the root where thor files are located, dependending on the OS.
+    #
+    def self.thor_root
+      File.join(user_home, ".thor").gsub(/\\/, '/')
+    end
+
+    # Returns the files in the thor root. On Windows thor_root will be something
+    # like this:
+    #
+    #   C:\Documents and Settings\james\.thor
+    #
+    # If we don't #gsub the \ character, Dir.glob will fail.
+    #
+    def self.thor_root_glob
+      files = Dir["#{thor_root}/*"]
+
+      files.map! do |file|
+        File.directory?(file) ? File.join(file, "main.thor") : file
+      end
+    end
+
+    # Where to look for Thor files.
+    #
+    def self.globs_for(path)
+      ["#{path}/Thorfile", "#{path}/*.thor", "#{path}/tasks/*.thor", "#{path}/lib/tasks/*.thor"]
+    end
+
+    # Return the path to the ruby interpreter taking into account multiple
+    # installations and windows extensions.
+    #
+    def self.ruby_command
+      @ruby_command ||= begin
+        ruby = File.join(Config::CONFIG['bindir'], Config::CONFIG['ruby_install_name'])
+        ruby << Config::CONFIG['EXEEXT']
+
+        # escape string in case path to ruby executable contain spaces.
+        ruby.sub!(/.*\s.*/m, '"\&"')
+        ruby
+      end
+    end
+
+  end
+end