Better end user visibility for failures in agit PRs

[TheFox0x7]

Feature Description

The error messages in agit PRs aren't very visible to the end user. I think that adding an error label for fails would make them pop out more (if one has color enabled). See screenshots for full options.

I encountered this while trying to submit an agit PR to docs, which uncovered a missing UserMsg, which would've been helpful:

gitea/routers/private/hook_proc_receive.go

Lines 31 to 34 in 7553ae1

	log.Error(err.Error())
	ctx.JSON(http.StatusInternalServerError, private.Response{
	Err: err.Error(),
	})

and I've glanced over it before, so I think having a color before it would be helpful.

Similarly an instruction for setting up branch tracking would be a good improvement - no idea how to set it up though.

Screenshots

Possible options:

[lunny]

I resolve the problems via resync of all git hooks because there are no proc-receive hooks under this repository. I think there is no migration for git hooks when introducing the agit feature.

[TheFox0x7]

I can reproduce this (or similar) fault locally - lack of collaborator status prevents user from submitting agit PR, which is not forwarded to them:

remote: Gitea: Internal Server Error (no message for end users)
remote: error: proc-receive exited abnormally

I in the original text I meant that the error should be made more visible (and descriptive), which I figured is more of a enhancement that an a bug. Some errors - like the lack of collaborator status - are worth forwarding to user in my opinion.
Apologies if I worded it in a confusing way originally.

[wxiaoguang]

If I understand correctly , only the "Gitea:" prefixed line is outputed by Gitea.

Other lines are from git, which are not controllable

[hiifong]

If I understand correctly , only the "Gitea:" prefixed line is outputed by Gitea.

Other lines are from git, which are not controllable

In fact, there is a lot of information without the Gitea prefix, which is also returned to the client by Gitea.

example：

[TheFox0x7]

That's on success though, which could also make use of the highlighted strings like:
hint: Create a new pull request for or same with visit.

My point here was that Gitea: Internal Server Error (no message for end users) is for one - missing an error which is informative to the end user, secondly not very obvious that is has an error - prefixing it with error too would I think help in this.

I can submit a PR for this once we agree on the scope - where to put highlighted strings and which errors should be passed down to user (or which should not, whichever is easier).

[hiifong]

However, we cannot modify the git buildin information, such as the error: proc-receive exited abnormally shown in your screenshot.
https://github.com/git/git/blob/996f0c583b36aa5d6c6308285aea1421eb7efae7/builtin/receive-pack.c#L998

[wxiaoguang]

My point here was that Gitea: Internal Server Error (no message for end users) is for one - missing an error which is informative to the end user, secondly not very obvious that is has an error - prefixing it with error too would I think help in this.

Agree to improve these error message. Actually it was even worse long time ago 🤣 .... I have managed to do some improvements (maybe there might be something interesting, FYI: Refactor internal API for git commands, use meaningful messages instead of "Internal Server Error" (#23687)). And yes, I still didn't make it good enough at that moment, so there are still a lot of things to do.

[hiifong]

As far as the current code is concerned, only the error level information is easier to implement, most of these are calls to the fail method,But there is no fixed way to return data for other levels of information.

[hiifong]

Sorry, forgive my poor English

[TheFox0x7]

I've looked through (probably) most errors and I think that the ErrMustCollaborator and ErrBlockedUser are only ones which would benefit from being visible to the end user same as with routers/web/repo.

Which also led me to discovering: #33013