Add gem tasks

Author: kpaulisse

Rakefile

@@ -1,4 +1,6 @@
+require "rake"
 require "rspec/core/rake_task"
+require_relative "rake/gem"
 
 namespace :octofacts do
   task :default => [:"octofacts:spec:octofacts", :"octofacts:spec:octofacts_updater", :"octofacts:spec:octofacts_integration"] do

rake/gem.rb

@@ -0,0 +1,150 @@
+require "fileutils"
+require "open3"
+require "shellwords"
+
+module Octofacts
+  # A class to contain methods and constants for cleaner code
+  class Gem
+    BASEDIR = File.expand_path("..", File.dirname(__FILE__)).freeze
+    GEMS = ["octofacts", "octofacts-updater"].freeze
+    PKGDIR = File.join(BASEDIR, "pkg").freeze
+
+    # Verify that Gemfile.lock matches .version and that it's committed, since `bundle exec ...` will
+    # update the file for us.
+    def self.verify_gemfile_version!
+      bundler = Bundler::LockfileParser.new(Bundler.read_file(File.expand_path("../Gemfile.lock", File.dirname(__FILE__))))
+      gems = bundler.specs.select { |specs| GEMS.include?(specs.name) }
+      GEMS.each do |gem|
+        this_gem = gems.detect { |g| g.name == gem }
+        unless this_gem
+          raise "Did not find #{gem} in Gemfile.lock"
+        end
+        unless this_gem.version.to_s == version
+          raise "Gem #{gem} is version #{this_gem.version}, not #{version}"
+        end
+      end
+
+      puts "Ensuring that all changes are committed."
+      exec_command("git diff-index --quiet HEAD --")
+      puts "OK: All gems on #{version} and no uncommitted changes here."
+    end
+
+    # Read the version number from the .version file in the root of the project.
+    def self.version
+      @version ||= File.read(File.expand_path("../.version", File.dirname(__FILE__))).strip
+    end
+
+    # Determine what branch we are on
+    def self.branch
+      exec_command("git rev-parse --abbrev-ref HEAD").strip
+    end
+
+    # Build the gem and put it into the 'pkg' directory
+    def self.build
+      Dir.mkdir PKGDIR unless File.directory?(PKGDIR)
+      GEMS.each do |gem|
+        begin
+          output_file = File.join(BASEDIR, "#{gem}-#{version}.gem")
+          target_file = File.join(PKGDIR, "#{gem}-#{version}.gem")
+          exec_command("gem build #{gem}.gemspec")
+          unless File.file?(output_file)
+            raise "gem #{gem} failed to create expected output file"
+          end
+          FileUtils.mv output_file, target_file
+          puts "Generated #{target_file}"
+        ensure
+          # Clean up the *.gem generated in the main directory if it's still there
+          FileUtils.rm(output_file) if File.file?(output_file)
+        end
+      end
+    end
+
+    # Push the gem to rubygems
+    def self.push
+      GEMS.each do |gem|
+        target_file = File.join(PKGDIR, "#{gem}-#{version}.gem")
+        unless File.file?(target_file)
+          raise "Cannot push: #{target_file} does not exist"
+        end
+      end
+      GEMS.each do |gem|
+        target_file = File.join(PKGDIR, "#{gem}-#{version}.gem")
+        exec_command("gem push #{Shellwords.escape(target_file)}")
+      end
+    end
+
+    # Tag the release on GitHub
+    def self.tag
+      # Make sure we have not released this version before
+      exec_command("git fetch -t origin")
+      tags = exec_command("git tag -l").split(/\n/)
+      raise "There is already a #{version} tag" if tags.include?(version)
+
+      # Tag it
+      exec_command("git tag #{Shellwords.escape(version)}")
+      exec_command("git push origin master")
+      exec_command("git push origin #{Shellwords.escape(version)}")
+    end
+
+    # Yank gem from rubygems
+    def self.yank
+      GEMS.each do |gem|
+        exec_command("gem yank #{gem} -v #{Shellwords.escape(version)}")
+      end
+    end
+
+    # Utility method: Execute command
+    def self.exec_command(command)
+      STDERR.puts "Command: #{command}"
+      output, code = Open3.capture2e(command, chdir: BASEDIR)
+      return output if code.exitstatus.zero?
+      STDERR.puts "Output:\n#{output}"
+      STDERR.puts "Exit code: #{code.exitstatus}"
+      exit code.exitstatus
+    end
+  end
+end
+
+namespace :gem do
+  task "build" do
+    branch = Octofacts::Gem.branch
+    unless branch == "master"
+      raise "On a non-master branch #{branch}; use gem:force-build if you really want to do this"
+    end
+    Octofacts::Gem.build
+  end
+
+  task "check" do
+    Octofacts::Gem.verify_gemfile_version!
+  end
+
+  task "force-build" do
+    branch = Octofacts::Gem.branch
+    unless branch == "master"
+      warn "WARNING: Force-building from non-master branch #{branch}"
+    end
+    Octofacts::Gem.build
+  end
+
+  task "push" do
+    Octofacts::Gem.push
+  end
+
+  task "release" do
+    branch = Octofacts::Gem.branch
+    unless branch == "master"
+      raise "On a non-master branch #{branch}; refusing to release"
+    end
+    [:check, :build, :tag, :push].each { |t| Rake::Task["gem:#{t}"].invoke }
+  end
+
+  task "tag" do
+    branch = Octofacts::Gem.branch
+    raise "On a non-master branch #{branch}; refusing to tag" unless branch == "master"
+    Octofacts::Gem.tag
+  end
+
+  task "yank" do
+    Octofacts::Gem.yank
+  end
+end