review: split format jobs and enable cache for clang-tidy.

Signed-off-by: Piotr Sikora <[email protected]>

Author: PiotrSikora

.github/workflows/cpp.yml

@@ -33,42 +33,120 @@ on:
 
 jobs:
 
-  format:
+  addlicense:
+    name: verify liceses
+
     runs-on: ubuntu-20.04
 
     steps:
     - uses: actions/checkout@v2
+
     - uses: actions/setup-go@v2
       with:
         go-version: '^1.16'
 
-    - name: Format (addlicense)
+    - name: Install dependencies (Linux)
       run: |
         go install github.com/google/addlicense@latest
-        export PATH=$PATH:$(go env GOPATH)/bin
-        addlicense -check .
+        echo "$(go env GOPATH)/bin" >> "$GITHUB_PATH"
 
-    - name: Format (buildifier)
+    - name: Format (addlicense)
+      run: addlicense -check .
+
+  buildifier:
+    name: check format with buildifier
+
+    runs-on: ubuntu-20.04
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - uses: actions/setup-go@v2
+      with:
+        go-version: '^1.16'
+
+    - name: Install dependencies (Linux)
       run: |
         go install github.com/bazelbuild/buildtools/buildifier@latest
-        export PATH=$PATH:$(go env GOPATH)/bin
-        find . -name "WORKSPACE" -o -name "*BUILD*" -o -name "*.bzl" | xargs -n1 buildifier -mode=check
+        echo "$(go env GOPATH)/bin" >> "$GITHUB_PATH"
+
+    - name: Format (buildifier)
+      run: find . -name "WORKSPACE" -o -name "*BUILD*" -o -name "*.bzl" | xargs -n1 buildifier -mode=check
+
+  clang_format:
+    name: check format with clang-format
+
+    runs-on: ubuntu-20.04
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Install dependencies (Linux)
+      run: sudo apt-get install -y clang-format-12
 
     - name: Format (clang-format)
       run: |
-        sudo apt-get install -y clang-format-12
         find . -name "*.h" -o -name "*.cc" -o -name "*.proto" | grep -v ".pb." | xargs -n1 clang-format-12 -i
         git diff --exit-code
 
-    - name: Format (clang-tidy)
-      run: |
-        sudo apt-get install -y clang-tidy-12
-        bazel build \
-        --config clang-tidy \
-        --define engine=multi \
-        --copt=-DPROXY_WASM_VERIFY_WITH_ED25519_PUBKEY=\"$(xxd -p -c 256 test/test_data/signature_key1.pub | cut -b9-)\" \
+  clang_tidy:
+    name: check format with clang-tidy
+
+    runs-on: ubuntu-20.04
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Install dependencies (Linux)
+      run: sudo apt-get install -y clang-tidy-12
+
+    - name: Bazel cache
+      uses: PiotrSikora/[email protected]
+      with:
+        path: |
+          ~/.cache/bazel
+        key: clang_tidy-${{ hashFiles('WORKSPACE', '.bazelrc', '.bazelversion', 'bazel/dependencies.bzl', 'bazel/repositories.bzl', 'bazel/cargo/wasmsign/crates.bzl') }}
+
+    - name: Bazel build
+      run: >
+        bazel build
+        --config clang-tidy
+        --define engine=multi
+        --copt=-DPROXY_WASM_VERIFY_WITH_ED25519_PUBKEY=\"$(xxd -p -c 256 test/test_data/signature_key1.pub | cut -b9-)\"
         //...
 
+    - name: Skip Bazel cache update
+      if: ${{ github.ref != 'refs/heads/master' }}
+      run: echo "CACHE_SKIP_SAVE=true" >> $GITHUB_ENV
+
+    - name: Cleanup Bazel cache
+      if: ${{ github.ref == 'refs/heads/master' }}
+      run: |
+        export OUTPUT=$(${{ matrix.run_under }} bazel info output_base)
+        echo "===== BEFORE ====="
+        du -s ${OUTPUT}/external/* $(dirname ${OUTPUT})/* | sort -rn | head -20
+        # BoringSSL's test data (90 MiB).
+        rm -rf ${OUTPUT}/external/boringssl/crypto_test_data.cc
+        rm -rf ${OUTPUT}/external/boringssl/src/crypto/*/test/
+        rm -rf ${OUTPUT}/external/boringssl/src/third_party/wycheproof_testvectors/
+        # LLVM's tests (500 MiB).
+        rm -rf ${OUTPUT}/external/llvm*/test/
+        # V8's tests (100 MiB).
+        if [ -d "${OUTPUT}/external/v8/test/torque" ]; then
+          mv ${OUTPUT}/external/v8/test/torque ${OUTPUT}/external/v8/test_torque
+          rm -rf ${OUTPUT}/external/v8/test/*
+          mv ${OUTPUT}/external/v8/test_torque ${OUTPUT}/external/v8/test/torque
+        fi
+        # Unnecessary CMake tools (65 MiB).
+        rm -rf ${OUTPUT}/external/cmake-*/bin/{ccmake,cmake-gui,cpack,ctest}
+        # Distfiles for Rust toolchains (350 MiB).
+        rm -rf ${OUTPUT}/external/rust_*/*.tar.gz
+        # Bazel's repository cache (650-800 MiB) and install base (155 MiB).
+        rm -rf ${OUTPUT}/../cache
+        rm -rf ${OUTPUT}/../install
+        echo "===== AFTER ====="
+        du -s ${OUTPUT}/external/* $(dirname ${OUTPUT})/* | sort -rn | head -20
+
   test_data:
     name: build test data