include head_commit in push webhooks if tag

[bradrydzewski]

It would be great if Gitea could include the head_commit in the push webhook if the object is a tag. For reference this is what GitHub sends in the push hook if the object is a tag:

{
  "ref": "refs/tags/v0.0.1",
  "before": "0000000000000000000000000000000000000000",
  "after": "d2b75aa7797ec26b088fa2dd527e9d2c052fcedd",
  "created": true,
  "deleted": false,
  "forced": false,
  "base_ref": "refs/heads/master",
  "compare": "https://github.com/bradrydzewski/drone-test-go/compare/v0.0.1",
  "commits": [

  ],
  "head_commit": {
    "id": "d2b75aa7797ec26b088fa2dd527e9d2c052fcedd",
    "tree_id": "f38d6b02c9ee18de68e5e6682721a22df4c9a29d",
    "distinct": true,
    "message": "Update .drone.yml",
    "timestamp": "2018-06-19T19:03:12-07:00",
    "url": "https://github.com/bradrydzewski/drone-test-go/commit/d2b75aa7797ec26b088fa2dd527e9d2c052fcedd",
    "author": {
      "name": "Brad Rydzewski",
      "email": "noreply@github.com",
      "username": "bradrydzewski"
    },
    "committer": {
      "name": "GitHub",
      "email": "noreply@github.com",
      "username": "web-flow"
    },
    "added": [

    ],
    "removed": [

    ],
    "modified": [
      ".drone.yml"
    ]
  }
}

For my specific use case, I would like to display the commit details (email address, commit message, etc) in the user interface in Drone. Currently these fields are blank. Thanks!

[tobybellwood]

more broadly, the head_commit is never populated - even for pushes. I've had a quick look at the attached PR, but it seems that Gitea has refactored some of their models since it was created and now is probably not applicable.

We do the same for Lagoon using the head_commit to display the full URL for the after commit on a push or create, and would like to be able to use our GitHub:x handlers instead of creating new ones just for Gitea

[zeripath]

This would very likely be a very a simple pr.