ci: stop caching the configuration cache across runners (#7454)

.github/actions/gradle-setup/action.yml

@@ -33,20 +33,8 @@ inputs:
   dependency_graph:
     description: |
       Dependency graph mode: disabled | generate | generate-and-submit | generate-and-upload |
-      download-and-submit. Submit needs `contents: write`. Never combine with
-      cache_configuration_cache — a CC-hit build generates NO graph.
+      download-and-submit. Submit needs `contents: write`.
     default: 'disabled'
-  cache_configuration_cache:
-    description: |
-      Persist .gradle/configuration-cache. Opt-in: only pays off when config inputs are
-      commit-stable (the VERSION_CODE-pinned jobs). Real-versionCode jobs would restore,
-      miss, and never re-save.
-    default: 'false'
-  cache_key_suffix:
-    description: |
-      Extra CC-key discriminator for matrix legs running different task graphs (test-shards).
-      Runner-only matrices don't need it — os/arch are already in the key.
-    default: ''
 runs:
   using: composite
   steps:
@@ -172,21 +160,3 @@ runs:
         # cache latency turns out to cost more than the restore it replaced.
         gradle-home-cache-excludes: |
           caches/build-cache-1
-
-    # CC entries live in the project dir; setup-gradle only caches the Gradle User Home —
-    # Develocity measured 100% CC miss (~52s config/build) before this. Runs after Setup
-    # Gradle so GRADLE_ENCRYPTION_KEY is exported. No sha in the key: unchanged build files
-    # hit exactly and skip the save; restore-keys is the self-heal for stale entries.
-    # The wrapper hash is its own restore-key segment: a stale same-version entry is a
-    # graceful CC miss, but an entry written by a DIFFERENT Gradle version can crash
-    # fingerprint deserialization outright (seen on 9.6.1 entries under 9.7.0).
-    - name: Cache Gradle configuration-cache
-      # Gates: opted in; key present (undecryptable otherwise — keeps keyless fork PRs off
-      # these entries); not merge_group (throwaway cache scope).
-      if: inputs.cache_configuration_cache == 'true' && inputs.gradle_encryption_key != '' && github.event_name != 'merge_group'
-      uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6
-      with:
-        path: ${{ github.workspace }}/.gradle/configuration-cache
-        key: gradle-cc-${{ runner.os }}-${{ runner.arch }}-${{ github.job }}${{ inputs.cache_key_suffix && format('-{0}', inputs.cache_key_suffix) || '' }}-${{ hashFiles('gradle/wrapper/gradle-wrapper.properties') }}-${{ hashFiles('settings.gradle.kts', '**/build.gradle.kts', 'build-logic/**', 'gradle/*.gradle', 'gradle/libs.versions.toml', 'gradle.properties', 'config.properties', '.github/ci-gradle.properties') }}
-        restore-keys: |
-          gradle-cc-${{ runner.os }}-${{ runner.arch }}-${{ github.job }}${{ inputs.cache_key_suffix && format('-{0}', inputs.cache_key_suffix) || '' }}-${{ hashFiles('gradle/wrapper/gradle-wrapper.properties') }}-

.github/workflows/protobufs-bump.yml

@@ -59,7 +59,6 @@ jobs:
           develocity_access_key: ${{ secrets.DEVELOCITY_ACCESS_KEY }}
           job_summary_pr_comment: 'never'
           cache_read_only: 'true'
-          cache_configuration_cache: 'false'
           cache_robolectric: 'false'
 
       # The sync is run to see what it would change; the result is not committed here.

.github/workflows/reusable-check.yml

@@ -96,13 +96,6 @@ jobs:
           develocity_access_key: ${{ secrets.DEVELOCITY_ACCESS_KEY }}
           job_summary_pr_comment: ${{ env.GRADLE_PR_COMMENT }}
           cache_read_only: ${{ env.GRADLE_CACHE_READ_ONLY }}
-          # Disabled on Gradle 9.7.1: restoring an entry written by another runner crashes
-          # fingerprint deserialization (IsInIdeaSyncValueSource CNFE, settings-plugin
-          # classloader scope) and the job dies in ~10s before any test. A cross-machine
-          # restore is the only thing that triggers it, so it is 100% red in CI and not
-          # reproducible from a local store/reuse pair. Re-enable when that is fixed
-          # upstream; VERSION_CODE is still pinned above so entries would reuse.
-          cache_configuration_cache: 'false'
 
       - name: Spotless, Detekt & Android Lint
         # The root spotlessCheck and detekt do not reach the included build-logic build.
@@ -134,13 +127,6 @@ jobs:
           develocity_access_key: ${{ secrets.DEVELOCITY_ACCESS_KEY }}
           job_summary_pr_comment: ${{ env.GRADLE_PR_COMMENT }}
           cache_read_only: ${{ env.GRADLE_CACHE_READ_ONLY }}
-          # Disabled on Gradle 9.7.1: restoring an entry written by another runner crashes
-          # fingerprint deserialization (IsInIdeaSyncValueSource CNFE, settings-plugin
-          # classloader scope) and the job dies in ~10s before any test. A cross-machine
-          # restore is the only thing that triggers it, so it is 100% red in CI and not
-          # reproducible from a local store/reuse pair. Re-enable when that is fixed
-          # upstream; VERSION_CODE is still pinned above so entries would reuse.
-          cache_configuration_cache: 'false'
 
       - name: Screenshot Test Validation
         # -Dorg.gradle.isolated-projects=false: AGP's screenshot plugin iterates BuildServicesRegistry at
@@ -312,15 +298,6 @@ jobs:
           develocity_access_key: ${{ secrets.DEVELOCITY_ACCESS_KEY }}
           job_summary_pr_comment: ${{ env.GRADLE_PR_COMMENT }}
           cache_read_only: ${{ env.GRADLE_CACHE_READ_ONLY }}
-          # Disabled on Gradle 9.7.1: restoring an entry written by another runner crashes
-          # fingerprint deserialization (IsInIdeaSyncValueSource CNFE, settings-plugin
-          # classloader scope) and the job dies in ~10s before any test. A cross-machine
-          # restore is the only thing that triggers it, so it is 100% red in CI and not
-          # reproducible from a local store/reuse pair. Re-enable when that is fixed
-          # upstream; VERSION_CODE is still pinned above so entries would reuse.
-          cache_configuration_cache: 'false'
-          # Shards run different task graphs; kover flips the graph again.
-          cache_key_suffix: ${{ matrix.shard.name }}${{ inputs.run_coverage && '-kover' || '' }}
           cache_konan: 'true'
 
       - name: Run Tests & Coverage (${{ matrix.shard.name }})

.github/workflows/scheduled-updates.yml

@@ -124,7 +124,6 @@ jobs:
           develocity_access_key: ${{ secrets.DEVELOCITY_ACCESS_KEY }}
           job_summary_pr_comment: 'never'
           cache_read_only: 'true'
-          cache_configuration_cache: 'false'
           cache_robolectric: 'false'
 
       - name: Regenerate the schema strings