Fix duplicated container repository names

lib/container_registry/path.rb

@@ -48,7 +48,7 @@ module ContainerRegistry
     end
 
     def root_repository?
-      @path == repository_project.full_path
+      @path == project_path
     end
 
     def repository_project
@@ -60,7 +60,13 @@ module ContainerRegistry
     def repository_name
       return unless has_project?
 
-      @path.remove(%r(^#{Regexp.escape(repository_project.full_path)}/?))
+      @path.remove(%r(^#{Regexp.escape(project_path)}/?))
+    end
+
+    def project_path
+      return unless has_project?
+
+      repository_project.full_path.downcase
     end
 
     def to_s

spec/lib/container_registry/path_spec.rb

@@ -189,7 +189,7 @@ describe ContainerRegistry::Path do
     end
 
     context 'when project exists' do
-      let(:group) { create(:group, path: 'some_group') }
+      let(:group) { create(:group, path: 'Some_Group') }
 
       let(:project) do
         create(:empty_project, group: group, name: 'some_project')
@@ -225,4 +225,33 @@ describe ContainerRegistry::Path do
       end
     end
   end
+
+  describe '#project_path' do
+    context 'when project does not exist' do
+      let(:path) { 'some/name' }
+
+      it 'returns nil' do
+        expect(subject.project_path).to be_nil
+      end
+    end
+
+    context 'when project with uppercase characters in path exists' do
+      let(:path) { 'somegroup/someproject' }
+
+      let(:group) { create(:group, path: 'SomeGroup') }
+
+      let(:project) do
+        create(:empty_project, group: group, name: 'SomeProject')
+      end
+
+      before do
+        allow(path).to receive(:repository_project)
+          .and_return(project)
+      end
+
+      it 'returns downcased project path' do
+        expect(subject.project_path).to eq 'somegroup/someproject'
+      end
+    end
+  end
 end