feat(jenkins): add Jenkins GitHub pull request builder plugin

Author: sanemat

README.md

@@ -24,10 +24,12 @@ env_pull.pull_request_id #=> 800
 * Travis-ci
     * `ENV['TRAVIS_PULL_REQUEST']`
     * [Environment Variables - Travis CI](http://docs.travis-ci.com/user/environment-variables/#Convenience-Variables)
-
 * CircleCI
     * `ENV['CIRCLE_PR_NUMBER']`
     * [Environment variables - CircleCI](https://circleci.com/docs/environment-variables#building-pull-requests-that-come-from-forks)
+* Jenkins GitHub pull request builder plugin
+    * `ENV['ghprbPullId']`
+    * [GitHub pull request builder plugin - Jenkins - Jenkins Wiki](https://wiki.jenkins-ci.org/display/JENKINS/GitHub+pull+request+builder+plugin#GitHubpullrequestbuilderplugin-EnvironmentVariables)
 
 
 ## Changelog

lib/env_pull_request/base.rb

@@ -11,6 +11,8 @@ def fetch_pull_request_id
         ENV['TRAVIS_PULL_REQUEST'].to_i
       elsif ENV['CIRCLE_PR_NUMBER']
         ENV['CIRCLE_PR_NUMBER'].to_i
+      elsif ENV['ghprbPullId']
+        ENV['ghprbPullId'].to_i
       end
     end
 

lib/env_pull_request/test_helper.rb

@@ -3,13 +3,16 @@ module TestHelper
     def stash_env_pull_request
       @original_travis_pull_request = ENV['TRAVIS_PULL_REQUEST']
       @original_circle_pr_number = ENV['CIRCLE_PR_NUMBER']
+      @original_ghprb_pull_id = ENV['ghprbPullId']
       ENV.delete 'TRAVIS_PULL_REQUEST'
       ENV.delete 'CIRCLE_PR_NUMBER'
+      ENV.delete 'ghprbPullId'
     end
 
     def restore_env_pull_request
       ENV['TRAVIS_PULL_REQUEST'] = @original_travis_pull_request
       ENV['CIRCLE_PR_NUMBER'] = @original_circle_pr_number
+      ENV['ghprbPullId'] = @original_ghprb_pull_id
     end
   end
 end

test/test_ci.rb

@@ -68,5 +68,27 @@ def self.shutdown
         end
       end
     end
+
+    sub_test_case 'Jenkins GitHub pull request builder plugin' do
+      pull_id = 800
+      setup do
+        ENV['ghprbPullId'] = pull_id.to_s
+      end
+
+      teardown do
+        ENV.delete 'ghprbPullId'
+      end
+
+      test '#pull_request?' do
+        assert do
+          EnvPullRequest.new.pull_request? == true
+        end
+      end
+      test '#pull_request_id' do
+        assert do
+          EnvPullRequest.new.pull_request_id == pull_id
+        end
+      end
+    end
   end
 end