cache-cleanup-pull-request.yml

---
# Docs: https://github.com/OpenGrabeso/clean-cache
#
# As we are using caches more and more, we are getting over the GitHubs 10 GB limit.
# Unfortunately GitHub does does not have very smart cache eviction policy
# Docs: https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/caching-dependencies-to-speed-up-workflows#usage-limits-and-eviction-policy
#
# Each pre-compiled coreboot toolchain takes up around 500 MB.
# The most space at the time of writing is taken up by coreboot toolchains. At the time of writing we
#   have 7 coreboot versions, each for x86 and arm64, resulting in 7*2*500=7 GB.
# Thankfully the coreboot toolchains are not re-built that often, but they do take almost 1 hour to build - hence
#   caching is a good idea.
# To make sure that the toolchains remain available as long as possible, we should start manually cleaning up the
#   cache - making the eviction logic smarter.

name: cache cleanup pull request
on:
  pull_request:
    types:
      - closed

permissions:
  actions: write
  contents: read
  pull-requests: read

jobs:
  cache-cleanup-pr:
    runs-on: ubuntu-latest
    steps:
      - name: Clean cache for the closed/merged PR
        uses: opengrabeso/clean-cache@v1
        continue-on-error: true
        with:
          keep: 1