bazel: speed up CI

Making sure github keeps bazel cache around

.bazelrc

@@ -1,5 +1,5 @@
 # Import Aspect bazelrc presets
-try-import %workspace%/.aspect/bazelrc/local/bazel7.bazelrc # will only work in bazel7+
+try-import %workspace%/.aspect/bazelrc/bazel7.bazelrc # will only work in bazel7+
 import %workspace%/.aspect/bazelrc/bazel6.bazelrc # will only work in bazel6+
 import %workspace%/.aspect/bazelrc/convenience.bazelrc
 import %workspace%/.aspect/bazelrc/correctness.bazelrc

.github/workflows/action.yml

@@ -6,40 +6,91 @@ on:
   pull_request:
     branches: [ main ]
 
+concurrency:
+  # Cancel previous actions from the same PR or branch except 'main' branch.
+  # See https://docs.github.com/en/actions/using-jobs/using-concurrency and https://docs.github.com/en/actions/learn-github-actions/contexts for more info.
+  group: concurrency-group::${{ github.workflow }}::${{ github.event.pull_request.number > 0 && format('pr-{0}', github.event.pull_request.number) || github.ref_name }}${{ github.ref_name == 'main' && format('::{0}', github.run_id) || ''}}
+  cancel-in-progress: ${{ github.ref_name != 'main' }}
+
+
 jobs:
 
   build-and-test:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - uses: bazelbuild/setup-bazelisk@v1
-    - run: bazel build --config=built-toolchain //... && bazel test --config=built-toolchain //...
+    - uses: actions/checkout@v4
+
+    - uses: bazel-contrib/[email protected]
+      with:
+        # Avoid downloading Bazel every time.
+        bazelisk-cache: true
+        # Store build cache per workflow.
+        disk-cache: ${{ github.workflow }}
+        # Share repository cache between workflows.
+        repository-cache: true
+        bazelrc: |
+          import %workspace%/.github/workflows/ci.bazelrc
+          common --config=built-toolchain
+
+    - run: bazel build //... && bazel test //...
 
   # TODO: deprecate by Jan 2025 https://bazel.build/release
   build-e2e-bazel-5:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - uses: bazelbuild/setup-bazelisk@v1
+    - uses: actions/checkout@v4
+    - uses: bazel-contrib/[email protected]
+      with:
+        # Avoid downloading Bazel every time.
+        bazelisk-cache: true
+        # Store build cache per workflow.
+        disk-cache: ${{ github.workflow }}
+        # Share repository cache between workflows.
+        repository-cache: true
+        bazelrc: import %workspace%/../../.github/workflows/ci.bazelrc
     - run: cd e2e/bazel-5 && bazel build //...
 
   build-e2e-bazel-6-nobzlmod:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - uses: bazelbuild/setup-bazelisk@v1
+    - uses: actions/checkout@v4
+    - uses: bazel-contrib/[email protected]
+      with:
+        # Avoid downloading Bazel every time.
+        bazelisk-cache: true
+        # Store build cache per workflow.
+        disk-cache: ${{ github.workflow }}
+        # Share repository cache between workflows.
+        repository-cache: true
+        bazelrc: import %workspace%/../../.github/workflows/ci.bazelrc
     - run: cd e2e/bazel-6 && bazel build //...
 
   build-e2e-bazel-6-bzlmod:
       runs-on: ubuntu-latest
       steps:
-      - uses: actions/checkout@v2
-      - uses: bazelbuild/setup-bazelisk@v1
+      - uses: actions/checkout@v4
+      - uses: bazel-contrib/[email protected]
+        with:
+          # Avoid downloading Bazel every time.
+          bazelisk-cache: true
+          # Store build cache per workflow.
+          disk-cache: ${{ github.workflow }}
+          # Share repository cache between workflows.
+          repository-cache: true
+          bazelrc: import %workspace%/../../.github/workflows/ci.bazelrc
       - run: cd e2e/bazel-6-bzlmod && bazel build //...
 
   build-e2e-bazel-7-nobzlmod:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
-    - uses: bazelbuild/setup-bazelisk@v1
+    - uses: actions/checkout@v4
+    - uses: bazel-contrib/[email protected]
+      with:
+        # Avoid downloading Bazel every time.
+        bazelisk-cache: true
+        # Store build cache per workflow.
+        disk-cache: ${{ github.workflow }}
+        # Share repository cache between workflows.
+        repository-cache: true
+        bazelrc: import %workspace%/../../.github/workflows/ci-e2e.bazelrc
     - run: cd e2e/bazel-7 && bazel build //...

.github/workflows/buildifier.yaml

@@ -10,11 +10,27 @@ on:
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
 
+concurrency:
+  # Cancel previous actions from the same PR or branch except 'main' branch.
+  # See https://docs.github.com/en/actions/using-jobs/using-concurrency and https://docs.github.com/en/actions/learn-github-actions/contexts for more info.
+  group: concurrency-group::${{ github.workflow }}::${{ github.event.pull_request.number > 0 && format('pr-{0}', github.event.pull_request.number) || github.ref_name }}${{ github.ref_name == 'main' && format('::{0}', github.run_id) || ''}}
+  cancel-in-progress: ${{ github.ref_name != 'main' }}
+
+
 jobs:
   check:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: bazelbuild/setup-bazelisk@v1
+
+      - uses: bazel-contrib/[email protected]
+        with:
+          # Avoid downloading Bazel every time.
+          bazelisk-cache: true
+          # Store build cache per workflow.
+          disk-cache: ${{ github.workflow }}
+          # Share repository cache between workflows.
+          repository-cache: true
+          bazelrc: import %workspace%/.github/workflows/ci.bazelrc
       - name: buildifier
         run: bazel run //:buildifier.check

.github/workflows/ci.bazelrc

@@ -0,0 +1,8 @@
+try-import %workspace%/.aspect/bazelrc/ci.bazelrc
+try-import %workspace%/../../.aspect/bazelrc/ci.bazelrc
+
+# Debug where options came from
+common --announce_rc
+
+# Allows tests to run bazelisk-in-bazel, since this is the cache folder used
+common --test_env=XDG_CACHE_HOME

.github/workflows/release.yml

@@ -14,10 +14,19 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - uses: bazel-contrib/[email protected]
+        with:
+          # Avoid downloading Bazel every time.
+          bazelisk-cache: true
+          # Store build cache per workflow.
+          disk-cache: ${{ github.workflow }}
+          # Share repository cache between workflows.
+          repository-cache: true
+          bazelrc: import %workspace%/.github/workflows/ci.bazelrc
+
+
       - name: Build Binaries
-        run: |
-          bazel --bazelrc=.aspect/bazelrc/ci.bazelrc \
-            build --config=release //tools/release
+        run: bazel  build --config=release //tools/release
 
       - uses: actions/upload-artifact@v4
         with: