What I try to accomplish to merge changes of forked repo into main repo. Both repo’s master branch are protected. I can accomplish it via Gitlab web pages. But unfortunately, Gitlab rest api for merge request does not have source_project_id attribute.
Is there any way to create merge request via command line for forked repo into main repo ?
When using the API, you would use the MR endpoint for the source project -- the fork that you created.
Suppose the "main" project is owner/main-project and your fork is user/main-project-fork
You would use the MR API endpoint (/projects/:id/merge_requests) using the id (or url-encoded path) of user/main-project-fork. Then you would provide the target_project_id parameter using the ID of the owner/main-project project.