Support for gemspec

features/gemspec.feature

@@ -0,0 +1,70 @@
+Feature: appraisals using an existing gemspec
+
+Background:
+  Given a directory named "gemspecced"
+  When I cd to "gemspecced"
+  And I write to "gemspecced.gemspec" with:
+  """
+  Gem::Specification.new do |s|
+      s.name        = %q{gemspecced}
+      s.version     = '0.1'
+      s.summary     = %q{featureful!}
+
+      s.add_runtime_dependency('mocha')
+      s.add_development_dependency('factory_girl', '1.3.2')
+  end
+  """
+  And a directory named "specdir"
+  And I write to "specdir/gemspecced.gemspec" with:
+  """
+  Gem::Specification.new do |s|
+      s.name        = %q{gemspecced}
+      s.version     = '0.1'
+      s.summary     = %q{featureful!}
+
+      s.add_runtime_dependency('mocha')
+      s.add_development_dependency('factory_girl', '1.3.0')
+  end
+  """
+  And I write to "Appraisals" with:
+  """
+  appraise "stock" do
+    gem "shoulda", "2.11.3"
+  end
+  """
+  When I write to "Rakefile" with:
+  """
+  require 'rubygems'
+  require 'bundler/setup'
+  require 'appraisal'
+  task :version do
+    require 'factory_girl'
+    puts "Loaded #{Factory::VERSION}"
+  end
+  """
+
+@disable-bundler
+Scenario: run a gem in the gemspec
+  And I write to "Gemfile" with:
+  """
+  source "http://rubygems.org"
+  gemspec
+  """
+  When I add "appraisal" from this project as a dependency
+  When I successfully run "rake appraisal:install --trace"
+  When I run "rake appraisal version --trace"
+  Then the output should contain "Loaded 1.3.2"
+
+
+@disable-bundler
+Scenario: run a gem in the gemspec via path
+  And I write to "Gemfile" with:
+  """
+  source "http://rubygems.org"
+  gemspec :path => './specdir'
+  """
+  When I add "appraisal" from this project as a dependency
+  When I successfully run "rake appraisal:install --trace"
+  When I run "rake appraisal version --trace"
+  Then the output should contain "Loaded 1.3.0"
+

lib/appraisal/gemfile.rb

@@ -1,9 +1,10 @@
 require 'appraisal/dependency'
+require 'appraisal/gemspec'
 
 module Appraisal
   # Load bundler Gemfiles and merge dependencies
   class Gemfile
-    attr_reader :dependencies
+    attr_reader :dependencies, :spec
 
     def initialize
       @dependencies = {}
@@ -27,7 +28,8 @@ def source(source)
 
     def to_s
       %{source "#{@source}"\n} <<
-        dependencies.values.map { |dependency| dependency.to_s }.join("\n")
+        dependencies.values.map { |dependency| dependency.to_s }.join("\n") <<
+        "\n" << spec.to_s
     end
 
     def dup
@@ -36,7 +38,12 @@ def dup
         dependencies.values.each do |dependency|
           gemfile.gem(dependency.name, *dependency.requirements)
         end
+        gemfile.gemspec(spec.opts)
       end
     end
+
+    def gemspec(opts = nil)
+      @spec = Gemspec.new(opts)
+    end
   end
 end

lib/appraisal/gemspec.rb

@@ -0,0 +1,16 @@
+require 'pathname'
+
+module Appraisal
+  class Gemspec
+    attr_reader :opts
+    def initialize(opts = nil)
+      @opts = opts || {}
+      # figure out the right path for the gemspec
+      @opts[:path] ||= '.'
+      @opts[:path] = ::File.expand_path(@opts[:path])
+    end
+    def to_s
+      "gemspec(#{opts.inspect})"
+    end
+  end
+end