scm: git: add model method to get heads from extra_info branches hash (#8857)

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@8816 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/repository/git.rb

@@ -194,6 +194,13 @@ class Repository::Git < Repository
   end
   private :save_revision
 
+  def heads_from_branches_hash
+    h1 = extra_info || {}
+    h  = h1.dup
+    h["branches"] ||= {}
+    h['branches'].map{|br, hs| hs['last_scmid']}
+  end
+
   def latest_changesets(path,rev,limit=10)
     revisions = scm.revisions(path, nil, rev, :limit => limit, :all => false)
     return [] if revisions.nil? || revisions.empty?

test/unit/repository_git_test.rb

@@ -244,6 +244,22 @@ class RepositoryGitTest < ActiveSupport::TestCase
       assert_equal 0, @repository.extra_info["db_consistent"]["ordering"]
     end
 
+    def test_heads_from_branches_hash
+      assert_nil @repository.extra_info
+      assert_equal 0, @repository.changesets.count
+      assert_equal [], @repository.heads_from_branches_hash
+      h = {}
+      h["branches"] = {}
+      h["branches"]["test1"] = {}
+      h["branches"]["test1"]["last_scmid"] = "1234abcd"
+      h["branches"]["test2"] = {}
+      h["branches"]["test2"]["last_scmid"] = "abcd1234"
+      @repository.merge_extra_info(h)
+      @repository.save
+      @project.reload
+      assert_equal ["1234abcd", "abcd1234"], @repository.heads_from_branches_hash.sort
+    end
+
     def test_latest_changesets
       assert_equal 0, @repository.changesets.count
       @repository.fetch_changesets