GitLab API to post inline comment to Merge Request

Question

Using GitLab API it is possible to post a comment to a commit "on a particular line of a particular file" (see here).

On Merge Request in order to add comments it's required to use the notes resource (see here) but the note object does not seem to contain any parameter to comment on a particular line.

However from the GitLab UI I'm able to add inline comments to a Merge Request in the Changes tab but when I call the API and look at the corresponding note object created from my inline comment there is nothing about the inline, it is only a regular note object without any line or line_type parameter...

Anyone knows how to use the GitLab API to add inline comments to a Merge Request ?

Answer 1

In order to add inline comments for merge requests, there is Discussions API: https://docs.gitlab.com/ce/api/discussions.html

Each discussion can contain a position in the code, like that:

    "position": {
      "base_sha": "b5d6e7b1613fca24d250fa8e5bc7bcc3dd6002ef",
      "start_sha": "7c9c2ead8a320fb7ba0b4e234bd9529a2614e306",
      "head_sha": "4803c71e6b1833ca72b8b26ef2ecd5adc8a38031",
      "old_path": "package.json",
      "new_path": "package.json",
      "position_type": "text",
      "old_line": 27,
      "new_line": 27
    },