Don't create multiple issues

[fabaff]

For the same failure the script creates new issues with every run it seems, e. g., like #169873.

If there is already an open issue then the script should pass that step or update the already present issue.

[SuperSandro2000]

Related https://github.com/samuela/nixpkgs-upkeep/issues/17#issuecomment-1105863730

[samuela]

Hey guys, sorry for the duplicate issues! I'm actively trying to figure out the best way to dedup issues. The current solution is to check for existing issues (open or closed) that either

• contain the same last 10 log lines, timing info removed, or
• have the same drv hash

But unfortunately every time I update the deduplication hashes, it then causes pre-existing issues to not be recognized. So although I think the current system does a decent job, it did take a decent amount of trial and error to get here. I'm really sorry about the spam! I try to do my best to triage any issues as they get generated.

[samuela]

Also, if you have any other ideas to improve the issue dedup'ing hashes, I'd be genuinely curious to hear! I'm open to any improvements to the system.

[SuperSandro2000]

I would suggest to use an extra repository right now. Then you can fidel with the code, test things and try to get the early bugs squashed out. If everything is battle tested and working to your likings it can be put live on nixpkgs. This way we can keep the disruption low and don't ping people unnecessarily.