[core] updated rake releases to generate markdown; added github_release task to publish to release feed.

lib/tasks/github_release_task.rb

@@ -0,0 +1,67 @@
+require "rake"
+require "rake/tasklib"
+require 'octokit'
+require 'netrc'
+
+module Fog
+  module Rake
+    class ChangelogTask < ::Rake::TaskLib
+
+      def initialize
+        desc "Update the changelog since the last release"
+        task(:github_release) do
+
+          File.open('CHANGELOG.md', 'r') do |file|
+            file.each_line do |line|
+              @current_line = line
+               if release_header?
+                 create_release if !release_exists? && @release
+                 @release_tag = release_match[1]
+                 @release = line
+               else
+                 @release << line
+               end
+            end
+          end
+        end
+      end
+
+      private
+
+      def create_release
+        github.create_release "fog/fog", "v#{@release_tag}", {:name => "v#{@release_tag}", :body => @release}
+        puts "creating release #{@release_tag}"
+      end
+
+      def releases
+        return @releases if @releases
+        response = github.releases("fog/fog")
+        @releases = response.collect {|r| r.tag_name }
+      end
+
+      def release_exists?
+        releases.find {|r| r == "v#{@release_tag}" } != nil
+      end
+
+      def release_header?
+        release_match != nil
+      end
+
+      def release_match
+        @current_line.match /## (\d+\.\d+\.\d+) \d+\/\d+\d+/
+      end
+
+      def github
+        unless @github
+          Octokit.auto_paginate = true
+          @github  = Octokit::Client.new :netrc => true
+          unless @github.login
+            @github = nil
+            raise "Please create a ~.netrc file to authenticate with github. For more information please see https://github.com/octokit/octokit.rb/blob/master/README.md#using-a-netrc-file"
+          end
+        end
+        @github
+      end
+    end
+  end
+end