Gradle Configuration Cache on CI

[SimonMarquis]

• https://github.com/gradle/actions/blob/main/docs/setup-gradle.md#saving-configuration-cache-data
• https://docs.gradle.org/current/userguide/configuration_cache.html#config_cache:secrets

And enable parallel Configuration Cache:

• https://docs.gradle.org/current/userguide/configuration_cache.html#config_cache:usage:parallel

This needs a GRADLE_ENCRYPTION_KEY secret to be configured in the repository settings/secrets/actions, otherwise no configuration cache will be saved or restored.
As explained in the docs, you can use this tool to generate a configuration-cache compatible key: openssl rand -base64 16.

This should help reduce the configuration phase for all the main worflow tasks in CI.

[SimonMarquis]

For example, a regular build spend this much time in configuration phase:

• Local tests and APKs
  • 52s
  • 27s
  • 33s
  • 30s
  • 24s
  • 41s
  • 29s
• androidTest (26)
  • 1m18s
• androidTest (34)
  • 1m18s

For a total duration of ~6min 30s.

[dturner]

Secret added:

[cdsap]

that's great @SimonMarquis. Out of curiosity, were you affected by this issue gradle/actions#21 on included builds?

[SimonMarquis]

@cdsap not on my fork, and I don't see it in this repo.
For example, on the latest run of the main branch: Local tests and APKs

./gradlew :build-logic:convention:check
Calculating task graph as configuration cache cannot be reused because an input to task ':build-logic:convention:processResources' has changed.
Configuration cache entry stored.

./gradlew dependencyGuard
Reusing configuration cache.
Configuration cache entry reused.

./gradlew verifyRoborazziDemoDebug
Calculating task graph as configuration cache cannot be reused because file '../../../../../usr/local/lib/android/sdk/platforms/android-35/package.xml' has changed.
Configuration cache entry stored.

./gradlew testDemoDebug :lint:test
Calculating task graph as configuration cache cannot be reused because file '../../../../../usr/local/lib/android/sdk/platforms/android-35/package.xml' has changed.
Configuration cache entry stored.

./gradlew :app:assemble
Calculating task graph as configuration cache cannot be reused because file '../../../../../usr/local/lib/android/sdk/platforms/android-35/package.xml' has changed.
1578 problems were found storing the configuration cache, 6 of which seem unique.
Configuration cache entry stored with 1578 problems.

./gradlew :app:lintProdRelease :app-nia-catalog:lintRelease :lint:lint
Calculating task graph as configuration cache cannot be reused because file '../../../../../usr/local/lib/android/sdk/platforms/android-35/package.xml' has changed.
Configuration cache entry stored.

./gradlew :app:checkProdReleaseBadging
Calculating task graph as configuration cache cannot be reused because file '../../../../../usr/local/lib/android/sdk/platforms/android-35/package.xml' has changed.
Configuration cache entry stored.

Only dependencyGuard re-used it's configuration cache.
The android/sdk/platforms/android-35/package.xml change might be a side effect of recent change.
We should be able to have more concrete data on the next CI build if it does not change too many things.