Retain Specific Caches #87
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| # Copyright (C) 2023 and later: Unicode, Inc. and others. | |
| # License & terms of use: http://www.unicode.org/copyright.html | |
| # | |
| # This workflow is designed to keep specific caches on the main | |
| # branch from getting evicted according to the Github Actions policy | |
| # (currently in 2023: 7 days) in cases where the cost to construct | |
| # the cache is high, especially in cases where there is flakiness | |
| # (ex: network loss / throttling when downloading artifacts) involved in | |
| # constructing the cache. | |
| # | |
| # Preventing a cache from eviction using this workflow requires that: | |
| # - the cache is not too big that it starves other caches | |
| # from using the shared cache quota for the repository | |
| # - the cache key is specific enough to avoid cache collisions, according | |
| # to good cache key design | |
| # - the cache key is not overly specific to cause unnecessary cache misses | |
| # (resulting in duplicate caches values, thereby wasting space), according | |
| # to good cache key design | |
| # - For more details, see: https://docs.github.com/en/actions/using-workflows/caching-dependencies-to-speed-up-workflows | |
| name: Retain Specific Caches | |
| on: | |
| schedule: | |
| # Because the Github Actions cache eviction policy is every 7 days, | |
| # this cron schedule is set to run every 6 days to ensure retention | |
| - cron: '0 12 */6 * *' | |
| jobs: | |
| retain-maven-cache: | |
| name: Run all tests with Maven | |
| runs-on: ubuntu-latest | |
| steps: | |
| - name: Checkout and setup | |
| uses: actions/checkout@v2 | |
| - name: Set up JDK 11 | |
| uses: actions/setup-java@v1 | |
| with: | |
| java-version: 11 | |
| - name: Cache local Maven repository | |
| uses: actions/cache@v2 | |
| with: | |
| path: ~/.m2/repository | |
| key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }} | |
| restore-keys: | | |
| ${{ runner.os }}-maven- | |
| - name: Set up out-of-source output dir | |
| run: | | |
| mkdir -p unicodetools/mine/Generated/BIN | |
| # Omitting running any build instructions. | |
| # | |
| # The point is to touch the cache before the TTL causes it to get evicted. | |
| # For Github Actions, the cache is preserved only when the cache action is | |
| # invoked and the job completes successfully. | |
| # | |
| # It seems sufficient for the CI job here to finish successfully by | |
| # trivially running nothing. |