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Use 'cache-read-only' for all but default_branch

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Cache entries _written_ from jobs run on a non-default branch will be private
to other jobs for that branch. When development flow involves working on a
feature branch and then merging into 'main', these branch-private cache
entries can result in eviction of other (shared) cache entries generated
for the default branch.

With this change, we make the recommended setup the default, by running
with `cache-read-only: true` for any jobs run on a non-default branch.
These jobs will be able to read cache entries written from the main branch,
but will not write any cache entries.

Fixes #143
This commit is contained in:
Daz DeBoer 2022-01-28 09:55:33 -07:00
parent fe92974cdf
commit 0a36ca9fb8
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1 changed files with 5 additions and 3 deletions
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8
action.yml
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@ -14,11 +14,13 @@ inputs:
default: false
cache-read-only:
description: When 'true', existing entries will be read from the cache but no entries will be written.
description: |
When 'true', existing entries will be read from the cache but no entries will be written.
By default this value is 'false' for workflows on the GitHub default branch and 'true' for workflows on other branches.
required: false
default: false
default: ${{ github.ref_name != github.event.repository.default_branch }}
# e.g. Use the following setting to only write cache entries from your 'main' branch
# cache-read-only: ${{ github.ref != 'refs/heads/main' }}
# cache-read-only: ${{ github.ref_name != 'main' }}
gradle-home-cache-includes:
description: Paths within Gradle User Home to cache.