# RIOT CI meeting 08.11.2021

## Participants
- Tom
- Francisco
- Kaspar
- Koen
- Leandro
- Karl
- @maribu
- Martine

## Agenda

- make CI faster!

## Performance Ideas

### lossless

- cancel earlier (current: after 500 failed)
- Kaspar will adjust the murdock backend to keep failed jobs after cancelled, then we set to 20 failed.
- staged build (e.g., all apps for one board, one app for all boards. only continue on success.)
- Marian will write script for figuring out default BOARD
- Kaspar will integrate in murdock-scripts
- manual Quickbuild / Fullbuild label
- fix labels, do it
- cache results based on tree hash
- let's do it.
- add hardware
- filter build based on heuristics (e.g., if only tests/foo changes, only build test/foo. if only .md changed, don't compile.) -> try, start simple
- remove support alltogether (boards, arch)

### lossy
- don't build what doesn't link (e.g., blacklist memory list) -> nah
- don't build variants -> make part of heuristics, put to the end -> yes

### action points

- [ ] define "quick build"
- [ ] make target or script to get default board for each application / test -> @marian
- [x] "undust" github get label script/function
-> need "LABELS=$(get_labels $prnum)" that is in-tree and can be called from murdock-scripts
- [ ] implement tree hash based cache -> @kaspar030
- [ ] Autoupdate riotbuild images on HAW+ cpus @tom
- [ ] Fast fail on Kconfig tests -> compare list of modules + pkgs before building @leandro
- [ ] figure out heuristics (if only test/foo changes)
- [ ] "simple" first, make extensible @marian
- [ ] use also to filter too similar board variants (nucleos, esp32, nrf52)