Mattermost Issue notification formatting broken

[cornelk]

• Gitea version (or commit ref): 1.10.0
• Git version:
• Operating system:
• Database (use [x]):
  • PostgreSQL
  • MySQL
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes (provide example URL)
  • No
  • Not relevant
• Log gist:

Description

I integrated Gitea using a Webhook to Mattermost. When I create an issue in Gitea the following text gets posted on Mattermost:

[org/repo] Issue submitted by cornel

<https://host/org/test/pulls/1|#1 to do this>

The link can't be clicked as it's in text form.

Gitlab posts created issues as:

[[org/repo](https://host/org/repo)] Issue opened by Cornel (cornel)

which creates a link that can be clicked in Mattermost.

Screenshots

[lunny]

@cornelk Did you create a slack type webhook?

[cornelk]

@lunny yes, it's a Slack typed Webhook.

Looking at the code of https://github.com/go-gitea/gitea/blob/a966a0298ea1a545c383541ca4e72c61de1ed59e/modules/webhook/slack.go I see that new commit posts get the repoLink/branchLink but getSlackIssuesPayload() does not make use of p.Repo.HTMLURL which will not allow any posted message in there to be clicked. I can fix it if wanted.

[lunny]

@cornelk could you send a PR?

[cornelk]

The issue got reopened, so I post the remaining problem with the formatting here:

comment formatting is still broken