xvrl commented on code in PR #15106:
URL: https://github.com/apache/druid/pull/15106#discussion_r1370439341


##########
.github/workflows/static-checks.yml:
##########
@@ -51,12 +51,33 @@ jobs:
         with:
           distribution: 'zulu'
           java-version: ${{ matrix.java }}
-          cache: 'maven'
+
+      - name: restore maven dependencies
+      # restore maven dependencies only. 'depsonly' keys are safe to restore
+      # since they don't contain any artifacts created by mvn install
+      - uses: actions/cache/restore@v3
+        with:
+          key: maven-${{ runner.os }}-depsonly-${{ hashFiles('**/pom.xml') }}
+          path: ~/.m2/repository
+          restore-keys: |
+            maven-${{ runner.os }}-depsonly-
+
+      - name: compile and cache maven dependencies
+        # run maven compile step to cache all shared maven dependencies
+        # maven install will be run in a subsequent step to avoid polluting 
the global maven cache

Review Comment:
   excluding artifacts is brittle since it requires knowing every artifact that 
the project might write to the local maven repo, and knowing what might or 
might not be safe to cache.
   
   Instead I'd rather we err on the safe side and only add things we know are 
safe to cache.



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