Merge branch 'send_checkout_sha_to_services' into 'master'

Send checkout sha to services

In case of tags it may be useful to have sha of commit this tag points to.
So now web hooks and services get additional parameter `checkout_sha`

See merge request !1400

lib/gitlab/git.rb

 module Gitlab
   module Git
     BLANK_SHA = '0' * 40
+
+    def self.extract_ref_name(ref)
+      ref.gsub(/\Arefs\/(tags|heads)\//, '')
+    end
   end
 end

lib/gitlab/push_data_builder.rb

 module Gitlab
   class PushDataBuilder
-    # Produce a hash of post-receive data
-    #
-    # data = {
-    #   before: String,
-    #   after: String,
-    #   ref: String,
-    #   user_id: String,
-    #   user_name: String,
-    #   project_id: String,
-    #   repository: {
-    #     name: String,
-    #     url: String,
-    #     description: String,
-    #     homepage: String,
-    #   },
-    #   commits: Array,
-    #   total_commits_count: Fixnum
-    # }
-    #
-    def self.build(project, user, oldrev, newrev, ref, commits = [])
-      # Total commits count
-      commits_count = commits.size
+    class << self
+      # Produce a hash of post-receive data
+      #
+      # data = {
+      #   before: String,
+      #   after: String,
+      #   ref: String,
+      #   user_id: String,
+      #   user_name: String,
+      #   project_id: String,
+      #   repository: {
+      #     name: String,
+      #     url: String,
+      #     description: String,
+      #     homepage: String,
+      #   },
+      #   commits: Array,
+      #   total_commits_count: Fixnum
+      # }
+      #
+      def build(project, user, oldrev, newrev, ref, commits = [])
+        # Total commits count
+        commits_count = commits.size
 
-      # Get latest 20 commits ASC
-      commits_limited = commits.last(20)
+        # Get latest 20 commits ASC
+        commits_limited = commits.last(20)
 
-      # Hash to be passed as post_receive_data
-      data = {
-        before: oldrev,
-        after: newrev,
-        ref: ref,
-        user_id: user.id,
-        user_name: user.name,
-        project_id: project.id,
-        repository: {
-          name: project.name,
-          url: project.url_to_repo,
-          description: project.description,
-          homepage: project.web_url,
-        },
-        commits: [],
-        total_commits_count: commits_count
-      }
+        # Hash to be passed as post_receive_data
+        data = {
+          before: oldrev,
+          after: newrev,
+          ref: ref,
+          checkout_sha: checkout_sha(project.repository, newrev, ref),
+          user_id: user.id,
+          user_name: user.name,
+          project_id: project.id,
+          repository: {
+            name: project.name,
+            url: project.url_to_repo,
+            description: project.description,
+            homepage: project.web_url,
+          },
+          commits: [],
+          total_commits_count: commits_count
+        }
 
-      # For performance purposes maximum 20 latest commits
-      # will be passed as post receive hook data.
-      commits_limited.each do |commit|
-        data[:commits] << commit.hook_attrs(project)
+        # For performance purposes maximum 20 latest commits
+        # will be passed as post receive hook data.
+        commits_limited.each do |commit|
+          data[:commits] << commit.hook_attrs(project)
+        end
+
+        data
       end
 
-      data
-    end
+      # This method provide a sample data generated with
+      # existing project and commits to test web hooks
+      def build_sample(project, user)
+        commits = project.repository.commits(project.default_branch, nil, 3)
+        build(project, user, commits.last.id, commits.first.id, "refs/heads/#{project.default_branch}", commits)
+      end
 
-    # This method provide a sample data generated with
-    # existing project and commits to test web hooks
-    def self.build_sample(project, user)
-      commits = project.repository.commits(project.default_branch, nil, 3)
-      build(project, user, commits.last.id, commits.first.id, "refs/heads/#{project.default_branch}", commits)
+      def checkout_sha(repository, newrev, ref)
+        if newrev != Gitlab::Git::BLANK_SHA && ref.start_with?('refs/tags/')
+          tag_name = Gitlab::Git.extract_ref_name(ref)
+          tag = repository.find_tag(tag_name)
+
+          if tag
+            commit = repository.commit(tag.target)
+            commit.try(:sha)
+          end
+        else
+          newrev
+        end
+      end
     end
   end
 end

spec/lib/gitlab/push_data_builder_spec.rb

@@ -21,13 +21,14 @@ describe 'Gitlab::PushDataBuilder' do
       Gitlab::PushDataBuilder.build(project,
                                     user,
                                     Gitlab::Git::BLANK_SHA,
-                                    '5937ac0a7beb003549fc5fd26fc247adbce4a52e',
+                                    '8a2a6eb295bb170b34c24c76c49ed0e9b2eaf34b',
                                     'refs/tags/v1.1.0')
     end
 
     it { data.should be_a(Hash) }
     it { data[:before].should == Gitlab::Git::BLANK_SHA }
-    it { data[:after].should == '5937ac0a7beb003549fc5fd26fc247adbce4a52e' }
+    it { data[:checkout_sha].should == '5937ac0a7beb003549fc5fd26fc247adbce4a52e' }
+    it { data[:after].should == '8a2a6eb295bb170b34c24c76c49ed0e9b2eaf34b' }
     it { data[:ref].should == 'refs/tags/v1.1.0' }
     it { data[:commits].should be_empty }
     it { data[:total_commits_count].should be_zero }