a new way to manage lists of gems with commoon things

.gitignore

@@ -2,3 +2,4 @@
 .bundle
 Gemfile.lock
 pkg/*
+.DS_Store

Gemfile

@@ -13,3 +13,4 @@ gem 'rspec', '~> 2.6.0'
 gem 'rake'
 
 gem 'cucumber'
+gem 'cuke-pack', :path => '../cuke-pack'

Guardfile

@@ -9,10 +9,13 @@ group :rspec do
   end
 end
 
-group :cucumber do
+# added by cuke-pack
-  guard 'cucumber' do
+
-    watch(%r{^features/.+\.feature$})
+group :wip do
+  guard 'cucumber', :env => :cucumber, :cli => '-p wip' do
+    watch(%r{^features/.+.feature$})
+    watch(%r{^(app|lib).*})          { 'features' }
     watch(%r{^features/support/.+$})          { 'features' }
-    watch(%r{^features/step_definitions/(.+)_steps\.rb$}) { |m| Dir[File.join("**/#{m[1]}.feature")][0] || 'features' }
+    watch(%r{^features/step_definitions/(.+).rb$}) { 'features' }
   end
 end

config/cucumber.yml

@@ -0,0 +1,8 @@
+<%
+std_opts = "-r features --format #{ENV['CUCUMBER_FORMAT'] || 'pretty'} -f Cucumber::StepWriter --out features/step_definitions --strict"
+%>
+default: <%= std_opts %> features
+wip: <%= std_opts %> --tags @wip features
+precommit: FAILFAST=true <%= std_opts %> --tags ~@wip:0 features
+cleanup: <%= std_opts %> -f Cucumber::CleanupFormatter --out unused.txt features
+

features/gemfile.feature

@@ -31,3 +31,41 @@ Feature: Gemfiles
       # generated by penchant, environment: local
       this is content
       """
+
+  Scenario: Use placeholder expansion
+    Given I have the file "Gemfile.erb" with the content:
+      """
+      <% env :local, :path => '../%s' do %>
+        gem 'test'
+      <% end %>
+      """
+    When I rebuild the Gemfile for "local" mode
+    Then the file "Gemfile" should have the following content:
+      """
+      # generated by penchant, environment: local
+
+        gem 'test', :path => %{../test}
+
+      """
+
+  Scenario: Use a gem list for an operation
+    Given I have the file "Gemfile.erb" with the content:
+      """
+      <% with_gem_list 'test' do %>
+        <% env :local, :path => '../%s' do %>
+          <%= gem %>
+        <% end %>
+      <% end %>
+      """
+    When I rebuild the Gemfile for "local" mode
+    Then the file "Gemfile" should have the following content:
+      """
+      # generated by penchant, environment: local
+
+        
+        
+          gem 'test', :path => %{../test}
+        
+
+      """
+  

features/step_definitions/when/i_rebuild_the_gemfile_for_local_mode.rb

@@ -0,0 +1,4 @@
+When /^I rebuild the Gemfile for "(.*?)" mode$/ do |env|
+  Penchant::Gemfile.do_full_env_switch!(env)
+end
+

features/support/cuke-pack.rb

@@ -0,0 +1,20 @@
+require 'cuke-pack/support/pause'
+require 'cuke-pack/support/pending'
+
+Before do
+  # if you want pending steps to pause before marking the step as pending,
+  # set @pause_ok to true
+
+  @pause_ok = false
+end
+
+require 'cuke-pack/support/step_writer'
+require 'cuke-pack/support/wait_for'
+require 'cuke-pack/support/failfast'
+
+# set the level of flaying on the step definitions
+# set it to false to skip flaying
+flay_level = 32
+
+require 'cuke-pack/support/flay'
+

lib/penchant/gemfile.rb

@@ -61,7 +61,7 @@ module Penchant
     def switch_to!(gemfile_env = nil, deployment = false)
       @env, @is_deployment = gemfile_env, deployment
 
-      output = [ header, ERB.new(template).result(binding) ]
+      output = [ header, ERB.new(template, nil, nil, '@_erbout').result(binding) ]
 
       File.open(gemfile_path, 'wb') { |fh| fh.print output.join("\n") }
     end
@@ -97,8 +97,36 @@ module Penchant
       File.read(gemfile_erb_path)
     end
 
-    def env(check, &block)
+    def env(check, template = {}, &block)
-      instance_eval(&block) if check.to_s == @env.to_s
+      if check.to_s == @env.to_s
+        original_erbout = @_erbout.dup
+
+        output = instance_eval(&block).lines.to_a
+
+        output.each do |line|
+          if gem_name = line[%r{gem ['"]([^'"]+)['"]}, 1]
+            new_line = line.rstrip
+            template.each do |key, value|
+              new_line += ", #{key.inspect} => %{#{value % gem_name}}"
+            end
+            new_line += "\n"
+            line.replace(new_line)
+          end
+        end
+
+        @_erbout = original_erbout + output.join
+      end
+    end
+
+    def with_gem_list(*gems)
+      gems.each do |gem|
+        @_current_gem = gem
+        yield
+      end
+    end
+
+    def gem
+      "gem '#{@_current_gem}'"
     end
 
     def no_deployment(&block)