Merge branch 'wc-catch-cmderr-branch' into 'master'

Catch Git::CommandError in Branches::CreateService

See merge request gitlab-org/gitlab!64727

app/services/branches/create_service.rb

@@ -9,12 +9,16 @@ module Branches
 
       return result if result[:status] == :error
 
-      new_branch = repository.add_branch(current_user, branch_name, ref)
+      begin
+        new_branch = repository.add_branch(current_user, branch_name, ref)
+      rescue Gitlab::Git::CommandError => e
+        return error("Failed to create branch '#{branch_name}': #{e}")
+      end
 
       if new_branch
         success(new_branch)
       else
-        error("Invalid reference name: #{ref}")
+        error("Failed to create branch '#{branch_name}': invalid reference name '#{ref}'")
       end
     rescue Gitlab::Git::PreReceiveError => e
       Gitlab::ErrorTracking.track_exception(e, pre_receive_message: e.raw_message, branch_name: branch_name, ref: ref)

spec/requests/api/branches_spec.rb

@@ -727,10 +727,11 @@ RSpec.describe API::Branches do
     end
 
     it 'returns 400 if ref name is invalid' do
+      error_message = 'Failed to create branch \'new_design3\': invalid reference name \'foo\''
       post api(route, user), params: { branch: 'new_design3', ref: 'foo' }
 
       expect(response).to have_gitlab_http_status(:bad_request)
-      expect(json_response['message']).to eq('Invalid reference name: foo')
+      expect(json_response['message']).to eq(error_message)
     end
   end
 

spec/requests/api/graphql/mutations/branches/create_spec.rb

@@ -35,11 +35,12 @@ RSpec.describe 'Creation of a new branch' do
     end
 
     context 'when ref is not correct' do
+      err_msg = 'Failed to create branch \'another_branch\': invalid reference name \'unknown\''
       let(:new_branch) { 'another_branch' }
       let(:ref) { 'unknown' }
 
       it_behaves_like 'a mutation that returns errors in the response',
-                      errors: ['Invalid reference name: unknown']
+                      errors: [err_msg]
     end
   end
 end

spec/services/branches/create_service_spec.rb

@@ -38,10 +38,23 @@ RSpec.describe Branches::CreateService do
       end
 
       it 'returns an error with a reference name' do
+        err_msg = 'Failed to create branch \'new-feature\': invalid reference name \'unknown\''
         result = service.execute('new-feature', 'unknown')
 
         expect(result[:status]).to eq(:error)
-        expect(result[:message]).to eq('Invalid reference name: unknown')
+        expect(result[:message]).to eq(err_msg)
+      end
+    end
+
+    context 'when an ambiguous branch name is provided' do
+      it 'returns an error that branch could not be created' do
+        err_msg = 'Failed to create branch \'feature\': 13:reference is ambiguous.'
+
+        service.execute('feature/widget', 'master')
+        result = service.execute('feature', 'master')
+
+        expect(result[:status]).to eq(:error)
+        expect(result[:message]).to eq(err_msg)
       end
     end
 

spec/services/commits/commit_patch_service_spec.rb

@@ -87,7 +87,7 @@ RSpec.describe Commits::CommitPatchService do
     context 'when specifying a non existent start branch' do
       let(:start_branch) { 'does-not-exist' }
 
-      it_behaves_like 'an error response', 'Invalid reference name'
+      it_behaves_like 'an error response', 'Failed to create branch'
     end
   end
 end