Incorporate Gitaly's local_branches operation into repo code

3 files changed, 66 insertions, 6 deletions

diff --git a/lib/gitlab/git/branch.rb b/lib/gitlab/git/branch.rb
index 586380da94a..124526e4b59 100644
--- a/lib/gitlab/git/branch.rb
+++ b/lib/gitlab/git/branch.rb
@@ -1,6 +1,40 @@
 module Gitlab
   module Git
     class Branch < Ref
+      def initialize(repository, name, target)
+        if target.is_a?(Gitaly::FindLocalBranchResponse)
+          target = target_from_gitaly_local_branches_response(target)
+        end
+
+        super(repository, name, target)
+      end
+
+      def target_from_gitaly_local_branches_response(response)
+        # Git messages have no encoding enforcements. However, in the UI we only
+        # handle UTF-8, so basically we cross our fingers that the message force
+        # encoded to UTF-8 is readable.
+        message = response.commit_subject.dup.force_encoding('UTF-8')
+
+        # NOTE: For ease of parsing in Gitaly, we have only the subject of
+        # the commit and not the full message. This is ok, since all the
+        # code that uses `local_branches` only cares at most about the
+        # commit message.
+        # TODO: Once gitaly "takes over" Rugged consider separating the
+        # subject from the message to make it clearer when there's one
+        # available but not the other.
+        hash = {
+          id: response.commit_id,
+          message: message,
+          authored_date: Time.at(response.commit_author.date.seconds),
+          author_name: response.commit_author.name,
+          author_email: response.commit_author.email,
+          committed_date: Time.at(response.commit_committer.date.seconds),
+          committer_name: response.commit_committer.name,
+          committer_email: response.commit_committer.email
+        }
+
+        Gitlab::Git::Commit.decorate(hash)
+      end
     end
   end
 end
diff --git a/lib/gitlab/git/commit.rb b/lib/gitlab/git/commit.rb
index e14c3511e60..297531db4cc 100644
--- a/lib/gitlab/git/commit.rb
+++ b/lib/gitlab/git/commit.rb
@@ -49,6 +49,7 @@ module Gitlab
         #   Commit.find(repo, 'master')
         #
         def find(repo, commit_id = "HEAD")
+          return commit_id if commit_id.is_a?(Gitlab::Git::Commit)
           return decorate(commit_id) if commit_id.is_a?(Rugged::Commit)
 
           obj = if commit_id.is_a?(String)
diff --git a/lib/gitlab/git/repository.rb b/lib/gitlab/git/repository.rb
index d380c5021ee..018b56c6dbe 100644
--- a/lib/gitlab/git/repository.rb
+++ b/lib/gitlab/git/repository.rb
@@ -80,14 +80,16 @@ module Gitlab
       end
 
       # Returns an Array of Branches
-      def branches
-        rugged.branches.map do |rugged_ref|
+      def branches(filter: nil, sort_by: nil)
+        branches = rugged.branches.each(filter).map do |rugged_ref|
           begin
             Gitlab::Git::Branch.new(self, rugged_ref.name, rugged_ref.target)
           rescue Rugged::ReferenceError
             # Omit invalid branch
           end
-        end.compact.sort_by(&:name)
+        end.compact
+
+        sort_branches(branches, sort_by)
       end
 
       def reload_rugged
@@ -108,9 +110,15 @@ module Gitlab
         Gitlab::Git::Branch.new(self, rugged_ref.name, rugged_ref.target) if rugged_ref
       end
 
-      def local_branches
-        rugged.branches.each(:local).map do |branch|
-          Gitlab::Git::Branch.new(self, branch.name, branch.target)
+      def local_branches(sort_by: nil)
+        gitaly_migrate(:local_branches) do |is_enabled|
+          if is_enabled
+            gitaly_ref_client.local_branches(sort_by: sort_by).map do |gitaly_branch|
+              Gitlab::Git::Branch.new(self, gitaly_branch.name, gitaly_branch)
+            end
+          else
+            branches(filter: :local, sort_by: sort_by)
+          end
         end
       end
 
@@ -1202,6 +1210,23 @@ module Gitlab
         diff.each_patch
       end
 
+      def sort_branches(branches, sort_by)
+        case sort_by
+        when 'name'
+          branches.sort_by(&:name)
+        when 'updated_desc'
+          branches.sort do |a, b|
+            b.dereferenced_target.committed_date <=> a.dereferenced_target.committed_date
+          end
+        when 'updated_asc'
+          branches.sort do |a, b|
+            a.dereferenced_target.committed_date <=> b.dereferenced_target.committed_date
+          end
+        else
+          branches
+        end
+      end
+
       def gitaly_ref_client
         @gitaly_ref_client ||= Gitlab::GitalyClient::Ref.new(self)
       end