add spec_prep, spec_clean, and spec_full rake tasks

These targets automate the fixtures directory using a configuration stored in
fixtures.yml. Because we can now handle the fixtures directory with a rake task,
the clone commands have been removed from the Travis config.

.travis.yml

@@ -2,9 +2,8 @@ language: ruby
 rvm:
   - 1.8.7
 before_script:
-  - "git clone git://github.com/puppetlabs/puppetlabs-stdlib.git spec/fixtures/modules/stdlib"
 after_script:
-script: "rake spec"
+script: "rake spec_full"
 branches:
   only:
     - master

Rakefile

@@ -1,5 +1,6 @@
 require 'rake'
 require 'rspec/core/rake_task'
+require 'yaml'
 
 task :default => [:spec]
 
@@ -9,6 +10,61 @@ RSpec::Core::RakeTask.new(:spec) do |t|
   t.pattern = 'spec/{classes,defines,unit}/**/*_spec.rb'
 end
 
+# This is a helper for the self-symlink entry of fixtures.yml
+def source_dir
+  File.dirname(__FILE__)
+end
+
+def fixtures(category)
+  begin
+    fixtures = YAML.load_file("fixtures.yml")["fixtures"]
+  rescue Errno::ENOENT
+    return {}
+  end
+
+  if not fixtures
+    abort("malformed fixtures.yml")
+  end
+
+  result = {}
+  if fixtures.include? category
+    fixtures[category].each do |fixture, source|
+      target = "spec/fixtures/modules/#{fixture}"
+      real_source = eval('"'+source+'"')
+      result[real_source] = target
+    end
+  end
+  return result
+end
+
+desc "Create the fixtures directory"
+task :spec_prep do
+  fixtures("repositories").each do |repo, target|
+    File::exists?(target) || system("git clone #{repo} #{target}")
+  end
+
+  fixtures("symlinks").each do |source, target|
+    File::exists?(target) || FileUtils::ln_s(source, target)
+  end
+end
+
+desc "Clean up the fixtures directory"
+task :spec_clean do
+  fixtures("repositories").each do |repo, target|
+    FileUtils::rm_rf(target)
+  end
+
+  fixtures("symlinks").each do |source, target|
+    FileUtils::rm(target)
+  end
+end
+
+task :spec_full do
+  Rake::Task[:spec_prep].invoke
+  Rake::Task[:spec].invoke
+  Rake::Task[:spec_clean].invoke
+end
+
 desc "Build puppet module package"
 task :build do
   # This will be deprecated once puppet-module is a face.

fixtures.yml

@@ -0,0 +1,5 @@
+fixtures:
+  repositories:
+    "stdlib": "git://github.com/puppetlabs/puppetlabs-stdlib.git"
+  symlinks:
+    "apt": "#{source_dir}"