1 files changed, 56 insertions, 0 deletions
diff --git a/lib/gitlab/git/push.rb b/lib/gitlab/git/push.rb
new file mode 100644
index 00000000000..7c1309721fd
--- /dev/null
+++ b/lib/gitlab/git/push.rb
@@ -0,0 +1,56 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Git
+    class Push
+      include Gitlab::Utils::StrongMemoize
+
+      attr_reader :oldrev, :newrev
+
+      def initialize(project, oldrev, newrev, ref)
+        @project = project
+        @oldrev = oldrev.presence || Gitlab::Git::BLANK_SHA
+        @newrev = newrev.presence || Gitlab::Git::BLANK_SHA
+        @ref = ref
+      end
+
+      def branch_name
+        strong_memoize(:branch_name) do
+          Gitlab::Git.branch_name(@ref)
+        end
+      end
+
+      def branch_added?
+        Gitlab::Git.blank_ref?(@oldrev)
+      end
+
+      def branch_removed?
+        Gitlab::Git.blank_ref?(@newrev)
+      end
+
+      def branch_updated?
+        branch_push? && !branch_added? && !branch_removed?
+      end
+
+      def force_push?
+        Gitlab::Checks::ForcePush.force_push?(@project, @oldrev, @newrev)
+      end
+
+      def branch_push?
+        strong_memoize(:branch_push) do
+          Gitlab::Git.branch_ref?(@ref)
+        end
+      end
+
+      def modified_paths
+        unless branch_updated?
+          raise ArgumentError, 'Unable to calculate modified paths!'
+        end
+
+        strong_memoize(:modified_paths) do
+          @project.repository.diff_stats(@oldrev, @newrev).paths
+        end
+      end
+    end
+  end
+end