add opposites feature to cut down on repetition

README.md

@@ -107,6 +107,22 @@ ensuring that hooks are always installed when `penchant gemfile` is executed, an
 that lets you pass in the username of the repo to reference that repo:
 `gem 'penchant', :github => 'johnbintz'`.
 
+### Stupid-simple local/remote setup
+
+Use `opposites :local, :remote` and environment settings for local/remote gems will be set accordingly depending
+on environment:
+
+``` ruby
+defaults_for env(:local), :path => '../%s'
+opposites :local, :remote
+
+env :remote do
+  gem 'my-gem', :git => 'git://github.com/johnbintz/my-gem.git'
+end
+```
+
+In `remote`, the Git repo version is used. In `local`, the path is used. Only one gem definition needed!
+
 ### Deployment mode
 
 Use `no_deployment` blocks to indicate gems that shouldn't even appear in `Gemfiles` destined for

features/cli.feature

@@ -62,7 +62,6 @@ Feature: CLI
     When I run "bin/penchant gemfile remote" in the "tmp" directory
     Then the output should not include "git hooks not installed"
 
-  @wip
   Scenario: Install Penchant into a directory with no Gemfile
     Given I have the directory "tmp"
     When I run "bin/penchant install" in the "tmp" directory

features/ruby_gemfile.feature

@@ -263,6 +263,65 @@ Feature: Gemfiles
       gem "two", {:require=>nil}
       """
 
+  Scenario: Set the opposite environment in the environment defaults
+    Given I have the file "Gemfile.penchant" with the content:
+      """
+      defaults_for env(:local), :path => '../%s', :opposite => :remote
+      defaults_for env(:remote), :opposite => :local
+      property(:github) { |name| { :git => "git://github.com/#{name}/%s.git" } }
+
+      env :remote do
+        gem 'one', :github => 'johnbintz', :require => nil
+      end
+      env :local do
+        gem 'two', :path => '../%s', :require => nil
+      end
+      """
+    When I rebuild the Gemfile for "local" mode
+    Then the file "Gemfile" should have the following content:
+      """
+      # generated by penchant, environment: local
+      gem "one", {:path=>"../one", :require=>nil}
+      gem "two", {:path=>"../two", :require=>nil}
+      """
+    When I rebuild the Gemfile for "remote" mode
+    Then the file "Gemfile" should have the following content:
+      """
+      # generated by penchant, environment: remote
+      gem "one", {:git=>"git://github.com/johnbintz/one.git", :require=>nil}
+      gem "two", {:require=>nil}
+      """
+
+  Scenario: Define a pair of opposites
+    Given I have the file "Gemfile.penchant" with the content:
+      """
+      defaults_for env(:local), :path => '../%s'
+      opposites :local, :remote
+
+      property(:github) { |name| { :git => "git://github.com/#{name}/%s.git" } }
+
+      env :remote do
+        gem 'one', :github => 'johnbintz', :require => nil
+      end
+      env :local do
+        gem 'two', :path => '../%s', :require => nil
+      end
+      """
+    When I rebuild the Gemfile for "local" mode
+    Then the file "Gemfile" should have the following content:
+      """
+      # generated by penchant, environment: local
+      gem "one", {:path=>"../one", :require=>nil}
+      gem "two", {:path=>"../two", :require=>nil}
+      """
+    When I rebuild the Gemfile for "remote" mode
+    Then the file "Gemfile" should have the following content:
+      """
+      # generated by penchant, environment: remote
+      gem "one", {:git=>"git://github.com/johnbintz/one.git", :require=>nil}
+      gem "two", {:require=>nil}
+      """
+
   Scenario: Override defaults for an environment
     Given I have the file "Gemfile.penchant" with the content:
       """

lib/penchant/gemfile.rb

@@ -143,15 +143,17 @@ module Penchant
 
         @available_environments += args
 
+        requested_env_defaults = _defaults_for(Env.new(environment))
+
         if block_given?
           if for_environment?(args)
-            @_current_env_defaults = _defaults_for(Env.new(environment))
+            @_current_env_defaults = requested_env_defaults
             yield
             @_current_env_defaults = {}
           else
-            if options[:opposite]
-              if for_environment?([ options[:opposite] ].flatten)
-                @_current_env_defaults = _defaults_for(Env.new(environment))
+            if opposite_environment = (options[:opposite] or requested_env_defaults[:opposite])
+              if for_environment?([ environment, args, opposite_environment ].flatten.uniq)
+                @_current_env_defaults = requested_env_defaults
                 @_strip_pathing_options = true
                 yield
                 @_strip_pathing_options = false
@@ -160,7 +162,7 @@ module Penchant
             end
           end
         else
-          Penchant::Gemfile::Env.new(args.shift)
+          Env.new(args.shift)
         end
       end
 
@@ -168,6 +170,14 @@ module Penchant
         @properties[name] = hash || block
       end
 
+      def opposites(left, right)
+        @defaults[Env.new(left).to_s] ||= {}
+        @defaults[Env.new(left).to_s][:opposite] = right
+
+        @defaults[Env.new(right).to_s] ||= {}
+        @defaults[Env.new(right).to_s][:opposite] = left
+      end
+
       def for_environment?(envs)
         envs.include?(environment) || environment == ANY_ENVIRONMENT
       end
@@ -226,6 +236,8 @@ module Penchant
 
         properties = process_option_stack(gem_name, _defaults_for(gem_name).to_a).merge(original_properties)
 
+        properties.delete(:opposite)
+
         Hash[properties.sort]
       end
 

lib/penchant/version.rb

@@ -1,3 +1,3 @@
 module Penchant
-  VERSION = "0.2.22"
+  VERSION = "0.2.23"
 end