[WIP] Create rake task lodge:release:prepare

Rakefile

@@ -4,3 +4,9 @@
 require File.expand_path('../config/application', __FILE__)
 
 Rails.application.load_tasks
+
+require File.expand_path('../rake/common.rb', __FILE__)
+
+Dir.glob('rake/tasks/*.rake').each do |r|
+  load r
+end

rake/common.rb

@@ -0,0 +1,26 @@
+class LodgeRake
+
+  @@log = Logger.new(STDOUT)
+  @@log.level = Logger::INFO
+  @@log.formatter = proc { |severity, datetime, progname, msg|
+      "%s  %5s  %s\n" % [datetime.strftime('%Y-%m-%d %H:%M:%S,%L'), severity, msg]
+    }
+  @@root_path = File.expand_path('../..', __FILE__)
+
+  def self.log
+    @@log
+  end
+
+  def self.root_path
+    @@root_path
+  end
+
+  def self.log_task_start(task_name)
+    @@log.info("Task `#{task_name}' started")
+  end
+
+  def self.log_task_end(task_name)
+    @@log.info("Task `#{task_name}' succeeded")
+  end
+
+end

rake/tasks/release.rake

@@ -0,0 +1,55 @@
+require 'bundler'
+require 'bundler/cli'
+
+namespace :lodge do
+
+  namespace :release do
+
+    desc 'Lock gemfile version to release'
+    task :prepare do
+      LodgeRake.log_task_start :release
+
+      Dir.chdir(LodgeRake.root_path) do
+        git_status = `git status -s 2>&1`
+        if $?.exitstatus != 0 or not git_status.empty?
+          raise "git status failed: #{git_status}"
+        end
+
+        bundle_install = `bundle install 2>&1`
+        if $?.exitstatus != 0
+          raise "bundle install failed: #{bundle_install}"
+        else
+          puts bundle_install
+        end
+      end
+
+      lockfile_path = File.expand_path('Gemfile.lock', LodgeRake.root_path)
+      lockfile = Bundler::LockfileParser::new(Bundler.read_file(lockfile_path))
+      gems = {}
+      lockfile.specs.each do |s|
+        gems[s.name] = s.version.to_s
+      end
+
+      gemfile_path = File.expand_path('Gemfile', LodgeRake.root_path)
+
+      replaced_gemfile_contents = ''
+      File.open(gemfile_path).each_line do |l|
+        gem_pattern = /^(.*gem\s+["'])([^"']+)(["']\s*,\s*["'])([^"']+)(["'].*)$/
+        if m = gem_pattern.match(l)
+          locked_version = gems[m[2]]
+          replaced_gemfile_contents << l.gsub(gem_pattern, "#{m[1]}#{m[2]}#{m[3]}#{locked_version}#{m[5]}")
+        else
+          replaced_gemfile_contents << l
+        end
+      end
+
+      File.open(gemfile_path, 'w') do |f|
+        f << replaced_gemfile_contents
+      end
+
+      LodgeRake.log_task_end :release
+    end
+
+  end
+
+end