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Fix cache warmer: add Windows runner, timestamp-based cache keys #1395

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gopalldb merged 2 commits into from
Apr 9, 2026
+24 −6
Merged

Fix cache warmer: add Windows runner, timestamp-based cache keys #1395

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a338ea5
Fix cache warmer: run on both OS, timestamp-based cache keys
gopalldb Apr 8, 2026
8fed9df
Fix cache warmer: add Windows runner, timestamp keys, enable long paths
gopalldb Apr 9, 2026
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30 changes: 24 additions & 6 deletions .github/workflows/warmMavenCache.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -29,13 +29,15 @@ permissions:

jobs:
warm-cache:
# Run on Linux only. Maven repository contents (JARs/POMs) are platform-independent.
# Windows forked PRs restore this same cache via the restore-keys prefix match.
# Note: Windows runners in databricks-protected-runner-group lack bash, which
# is required for the OIDC token exchange scripts.
# Run on both Linux and Windows. GitHub Actions cache is OS-scoped —
# a cache saved on Linux cannot be restored on Windows and vice versa.
strategy:
fail-fast: false
matrix:
github-runner: [linux-ubuntu-latest, windows-server-latest]
runs-on:
group: databricks-protected-runner-group
labels: linux-ubuntu-latest
labels: ${{ matrix.github-runner }}

steps:
- name: Set up JDK
Expand All @@ -44,6 +46,10 @@ jobs:
java-version: 21
distribution: 'adopt'

- name: Enable long paths (Windows)
if: runner.os == 'Windows'
run: git config --system core.longpaths true

# If PR number provided, checkout only pom.xml files from the fork (security: no source code)
- name: Checkout PR pom.xml files (sparse)
if: inputs.pr_number != ''
Expand Down Expand Up @@ -176,8 +182,20 @@ jobs:
find ~/.m2/repository -name '_remote.repositories' -exec sed -i 's/jfrog-central/central/g' {} \;
echo "Normalized ${COUNT} _remote.repositories markers (jfrog-central -> central)"

- name: Generate cache key with timestamp
id: cache-key
shell: bash
run: |
# Include timestamp so each warmer run creates a new cache entry
# (GitHub Actions caches are immutable — can't overwrite existing keys).
# The restore step uses prefix 'maven-deps-' to match the latest entry.
# Old entries auto-expire after 7 days of no access.
TIMESTAMP=$(date -u +%Y%m%d%H%M%S)
POM_HASH=${{ hashFiles('**/pom.xml') }}
echo "key=maven-deps-${TIMESTAMP}-${POM_HASH}" >> $GITHUB_OUTPUT

- name: Save Maven dependency cache
uses: actions/cache/save@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
with:
path: ~/.m2/repository
key: maven-deps-${{ hashFiles('**/pom.xml') }}
key: ${{ steps.cache-key.outputs.key }}
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