Add release task to Rakefile

Author: alfredxing

.gitignore

@@ -2,3 +2,4 @@
 Gemfile.lock
 test/destination
 .bundle
+pkg/

Rakefile

@@ -11,6 +11,9 @@ rescue Bundler::BundlerError => e
   exit e.status_code
 end
 
+
+# Test task
+
 require 'rake'
 require 'rake/testtask'
 
@@ -21,3 +24,42 @@ Rake::TestTask.new(:test) do |test|
 end
 
 task :default => 'test'
+
+
+# Release task
+
+def name
+  @name ||= File.basename(Dir['*.gemspec'].first, ".*")
+end
+
+def version
+  Jekyll::Archives::VERSION
+end
+
+def gemspec_file
+  "#{name}.gemspec"
+end
+
+def gem_file
+  "#{name}-#{version}.gem"
+end
+
+desc "Release #{name} v#{version}"
+task :release => :build do
+  unless `git branch` =~ /^\* master$/
+    puts "You must be on the master branch to release!"
+    exit!
+  end
+  sh "git commit --allow-empty -m 'Release :gem: #{version}'"
+  sh "git tag v#{version}"
+  sh "git push origin master"
+  sh "git push origin v#{version}"
+  sh "gem push pkg/#{name}-#{version}.gem"
+end
+
+desc "Build #{name} v#{version} into pkg/"
+task :build do
+  mkdir_p "pkg"
+  sh "gem build #{gemspec_file}"
+  sh "mv #{gem_file} pkg"
+end