Add revert to commits API

1 files changed, 34 insertions, 0 deletions

diff --git a/lib/api/commits.rb b/lib/api/commits.rb
index e59abd3e3d0..1b228069005 100644
--- a/lib/api/commits.rb
+++ b/lib/api/commits.rb
@@ -204,6 +204,40 @@ module API
         end
       end
 
+      desc 'Revert a commit in a branch' do
+        detail 'This feature was introduced in GitLab 11.6'
+        success Entities::Commit
+      end
+      params do
+        requires :sha, type: String, desc: 'Commit SHA to revert'
+        requires :branch, type: String, desc: 'Target branch name', allow_blank: false
+      end
+      post ':id/repository/commits/:sha/revert', requirements: API::COMMIT_ENDPOINT_REQUIREMENTS do
+        authorize_push_to_branch!(params[:branch])
+
+        commit = user_project.commit(params[:sha])
+        not_found!('Commit') unless commit
+
+        find_branch!(params[:branch])
+
+        commit_params = {
+          commit: commit,
+          start_branch: params[:branch],
+          branch_name: params[:branch]
+        }
+
+        result = ::Commits::RevertService
+          .new(user_project, current_user, commit_params)
+          .execute
+
+        if result[:status] == :success
+          present user_project.repository.commit(result[:result]),
+            with: Entities::Commit
+        else
+          render_api_error!(result[:message], 400)
+        end
+      end
+
       desc 'Get all references a commit is pushed to' do
         detail 'This feature was introduced in GitLab 10.6'
         success Entities::BasicRef