Move Project#resolve_ref to Repository

app/models/project.rb

@@ -1160,21 +1160,6 @@ class Project < ActiveRecord::Base
     end
   end
 
-  def resolve_ref(ref)
-    tag_exists = repository.tag_exists?(ref)
-    branch_exists = repository.branch_exists?(ref)
-
-    if tag_exists && branch_exists
-      nil
-    elsif tag_exists
-      Gitlab::Git::TAG_REF_PREFIX + ref
-    elsif branch_exists
-      Gitlab::Git::BRANCH_REF_PREFIX + ref
-    else
-      ref
-    end
-  end
-
   def root_ref?(branch)
     repository.root_ref == branch
   end
@@ -1752,7 +1737,7 @@ class Project < ActiveRecord::Base
   end
 
   def protected_for?(ref)
-    resolved_ref = resolve_ref(ref)
+    resolved_ref = repository.resolve_ref(ref)
     return false unless resolved_ref
 
     ref_name = Gitlab::Git.ref_name(resolved_ref)

app/models/repository.rb

@@ -182,6 +182,21 @@ class Repository
     tags.find { |tag| tag.name == name }
   end
 
+  def resolve_ref(ref)
+    tag_exists = tag_exists?(ref)
+    branch_exists = branch_exists?(ref)
+
+    if tag_exists && branch_exists
+      nil
+    elsif tag_exists
+      Gitlab::Git::TAG_REF_PREFIX + ref
+    elsif branch_exists
+      Gitlab::Git::BRANCH_REF_PREFIX + ref
+    else
+      ref
+    end
+  end
+
   def add_branch(user, branch_name, ref)
     branch = raw_repository.add_branch(branch_name, user: user, target: ref)
 

lib/gitlab/ci/pipeline/chain/validate/repository.rb

@@ -17,7 +17,7 @@ module Gitlab
                 return error('Commit not found')
               end
 
-              unless @command.project.resolve_ref(@command.origin_ref)
+              unless @command.project.repository.resolve_ref(@command.origin_ref)
                 return error('Ref is ambiguous')
               end
             end

spec/models/project_spec.rb

@@ -2568,7 +2568,7 @@ describe Project do
     subject { project.protected_for?('ref') }
 
     before do
-      allow(project).to receive(:resolve_ref).and_return(ref)
+      allow(project.repository).to receive(:resolve_ref).and_return(ref)
     end
 
     context 'when ref is ambiguous' do
@@ -2796,55 +2796,6 @@ describe Project do
     end
   end
 
-  describe '#resolve_ref' do
-    let(:project) { create(:project, :repository) }
-
-    subject { project.resolve_ref(ref) }
-
-    context 'when ref is full ref' do
-      let(:ref) { 'refs/heads/master' }
-
-      it 'returns the ref' do
-        is_expected.to eq(ref)
-      end
-    end
-
-    context 'when ref is a tag or branch name' do
-      let(:ref) { 'ref' }
-
-      context 'when ref is ambiguous' do
-        before do
-          project.repository.add_tag(project.creator, ref, 'master')
-          project.repository.add_branch(project.creator, ref, 'master')
-        end
-
-        it 'returns nil' do
-          is_expected.to eq(nil)
-        end
-      end
-
-      context 'when ref is tag name' do
-        before do
-          project.repository.add_tag(project.creator, ref, 'master')
-        end
-
-        it 'returns the tag ref' do
-          is_expected.to eq("refs/tags/#{ref}")
-        end
-      end
-
-      context 'when ref is branch name' do
-        before do
-          project.repository.add_branch(project.creator, ref, 'master')
-        end
-
-        it 'returns the branch ref' do
-          is_expected.to eq("refs/heads/#{ref}")
-        end
-      end
-    end
-  end
-
   describe '#http_url_to_repo' do
     let(:project) { create(:project) }
 

spec/models/repository_spec.rb

@@ -1005,6 +1005,53 @@ describe Repository do
     end
   end
 
+  describe '#resolve_ref' do
+    subject { repository.resolve_ref(ref) }
+
+    context 'when ref is full ref' do
+      let(:ref) { 'refs/heads/master' }
+
+      it 'returns the ref' do
+        is_expected.to eq(ref)
+      end
+    end
+
+    context 'when ref is a tag or branch name' do
+      let(:ref) { 'ref' }
+
+      context 'when ref is ambiguous' do
+        before do
+          repository.add_tag(project.creator, ref, 'master')
+          repository.add_branch(project.creator, ref, 'master')
+        end
+
+        it 'returns nil' do
+          is_expected.to eq(nil)
+        end
+      end
+
+      context 'when ref is tag name' do
+        before do
+          repository.add_tag(project.creator, ref, 'master')
+        end
+
+        it 'returns the tag ref' do
+          is_expected.to eq("refs/tags/#{ref}")
+        end
+      end
+
+      context 'when ref is branch name' do
+        before do
+          repository.add_branch(project.creator, ref, 'master')
+        end
+
+        it 'returns the branch ref' do
+          is_expected.to eq("refs/heads/#{ref}")
+        end
+      end
+    end
+  end
+
   describe '#add_branch' do
     let(:branch_name) { 'new_feature' }
     let(:target) { 'master' }