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[MINOR] Persist the Maven build cache between CI runs #882

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[MINOR] Persist the Maven build cache between CI runs #882

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20 changes: 20 additions & 0 deletions .github/workflows/mvn-ci-build.yml
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Expand Up @@ -43,5 +43,25 @@ jobs:
distribution: 'temurin'
cache: maven

# `cache: maven` above only persists ~/.m2/repository. The build cache
# extension configured in .mvn/extensions.xml writes to ~/.m2/build-cache,
# so without this it starts empty on every run and never restores a module.
# Only `main` writes an entry, so pull requests warm up from `main` instead
# of each branch filling the repository-wide cache budget.
- name: Restore Maven build cache
uses: actions/cache/restore@v6
with:
path: ~/.m2/build-cache
key: maven-build-cache-${{ runner.os }}-${{ github.sha }}
restore-keys: |
maven-build-cache-${{ runner.os }}-

- name: Build all module with Maven
run: ./mvnw clean install -ntp -B

- name: Save Maven build cache
if: github.ref == 'refs/heads/main' && success()
uses: actions/cache/save@v6
with:
path: ~/.m2/build-cache
key: maven-build-cache-${{ runner.os }}-${{ github.sha }}
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