Track SHA values that raise exceptions in CI lint

Invalid SHAs raise GRPC::InvalidArgument during the CI linting process
when the linter attempts to fetch local includes. We want to track the
invalid SHA values so we can understand how they are being included in
the query sent by the frontend on the pipeline editor page.

app/graphql/resolvers/ci/config_resolver.rb

@@ -38,6 +38,8 @@ module Resolvers
           .validate(content, dry_run: dry_run)
 
         response(result).merge(merged_yaml: result.merged_yaml)
+      rescue GRPC::InvalidArgument => error
+        Gitlab::ErrorTracking.track_and_raise_exception(error, sha: sha)
       end
 
       private

spec/graphql/resolvers/ci/config_resolver_spec.rb

@@ -6,16 +6,24 @@ RSpec.describe Resolvers::Ci::ConfigResolver do
   include GraphqlHelpers
 
   describe '#resolve' do
-    before do
+    let_it_be(:user) { create(:user) }
+    let_it_be(:project) { create(:project, :repository, creator: user, namespace: user.namespace) }
+    let_it_be(:sha) { nil }
+
+    let_it_be(:content) do
+      File.read(Rails.root.join('spec/support/gitlab_stubs/gitlab_ci_includes.yml'))
+    end
+
+    let(:ci_lint) do
       ci_lint_double = instance_double(::Gitlab::Ci::Lint)
       allow(ci_lint_double).to receive(:validate).and_return(fake_result)
 
-      allow(::Gitlab::Ci::Lint).to receive(:new).and_return(ci_lint_double)
+      ci_lint_double
     end
 
-    let_it_be(:user) { create(:user) }
-    let_it_be(:project) { create(:project, :repository, creator: user, namespace: user.namespace) }
-    let_it_be(:sha) { nil }
+    before do
+      allow(::Gitlab::Ci::Lint).to receive(:new).and_return(ci_lint)
+    end
 
     subject(:response) do
       resolve(described_class,
@@ -33,10 +41,6 @@ RSpec.describe Resolvers::Ci::ConfigResolver do
         )
       end
 
-      let_it_be(:content) do
-        File.read(Rails.root.join('spec/support/gitlab_stubs/gitlab_ci_includes.yml'))
-      end
-
       it 'lints the ci config file and returns the merged yaml file' do
         expect(response[:status]).to eq(:valid)
         expect(response[:merged_yaml]).to eq(content)
@@ -74,5 +78,23 @@ RSpec.describe Resolvers::Ci::ConfigResolver do
         expect(response[:errors]).to eq(['Invalid configuration format'])
       end
     end
+
+    context 'with an invalid SHA' do
+      let_it_be(:sha) { ':' }
+
+      let(:ci_lint) do
+        ci_lint_double = instance_double(::Gitlab::Ci::Lint)
+        allow(ci_lint_double).to receive(:validate).and_raise(GRPC::InvalidArgument)
+
+        ci_lint_double
+      end
+
+      it 'logs the invalid SHA to Sentry' do
+        expect(Gitlab::ErrorTracking).to receive(:track_and_raise_exception)
+          .with(GRPC::InvalidArgument, sha: ':')
+
+        response
+      end
+    end
   end
 end