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ci: [Robolectric CI 2] Cache Robolectric android-all jars in the build job #6545

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ci: [Robolectric CI 2] Cache Robolectric android-all jars in the build job #6545

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15b8368
ci: Cache Robolectric android-all jars in the build job
romtsn Nov 10, 2026
617fc70
ci: Remove note comment from Robolectric cache step
romtsn Nov 10, 2026
8220904
ci: Restore cache size note on Robolectric cache step
romtsn Nov 10, 2026
4cf3c9c
ci: Save the Robolectric jar cache only on main
romtsn Nov 11, 2026
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27 changes: 27 additions & 0 deletions .github/workflows/build.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -30,9 +30,36 @@ jobs:
- name: Setup Gradle
uses: gradle/actions/setup-gradle@8da46b539cd8fe6ab27ca75128919a18d757604c # v6.4.1

# Robolectric downloads one android-all-instrumented jar (100-200 MB) per SDK level at test
# runtime into ~/.m2, which setup-gradle does not cache. The key changes only when the
# Robolectric version or the set of SDK levels used by tests changes.
- name: Compute Robolectric cache key
id: robolectric-key
run: |
key=$( (grep '^roboelectric' gradle/libs.versions.toml; git grep -hoE 'sdk *= *\[[^]]*\]|^sdk=.*' -- '*/src/test/*') | sort -u | sha256sum | cut -c1-16)
echo "key=$key" >> "$GITHUB_OUTPUT"

- name: Restore Robolectric android-all jars
id: robolectric-cache
uses: actions/cache/restore@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
with:
path: ~/.m2/repository/org/robolectric
key: robolectric-${{ steps.robolectric-key.outputs.key }}
# A partial hit keeps old jars around, so the entry grows a bit across Robolectric
# upgrades. Drop restore-keys if the cache size matters.
restore-keys: robolectric-

- name: Run Tests and Lint
run: make preMerge

# Only main saves, so PRs share one entry instead of each storing ~700 MB.
- name: Save Robolectric android-all jars
if: github.ref == 'refs/heads/main' && steps.robolectric-cache.outputs.cache-hit != 'true'
uses: actions/cache/save@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
with:
path: ~/.m2/repository/org/robolectric
key: robolectric-${{ steps.robolectric-key.outputs.key }}

- name: Install Sentry CLI
uses: getsentry/action-setup-cli@70d7e587b84c2e78cf4d37cd33d7b74fb3729c1b # v1

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