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Aliaksandr Adziareika
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Introduce ccache-setup action
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‎.github/actions/ccache-setup/action.yml‎

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name: Setup ccache
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description: Configure ccache for faster builds with caching
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inputs:
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cmake-config-args:
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description: 'CMake configure arguments (used to extract compiler for cache key)'
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required: false
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default: ''
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cmake-build-type:
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description: 'Build type (Release, Debug) for cache key'
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required: false
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default: ''
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target-arch:
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description: 'Target architecture for cross-compilation (e.g., x86-32, arm64). If not set, detected from host.'
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required: false
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default: ''
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cache-key-prefix:
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description: 'Prefix for cache key (e.g., opendaq, test). If not set, no prefix is used.'
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required: false
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default: ''
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outputs:
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cache-hit:
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description: 'Whether cache was restored'
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value: ${{ steps.cache.outputs.cache-hit }}
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cache-key:
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description: 'The cache key used'
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value: ccache-${{ steps.ccache-key.outputs.prefix }}${{ steps.ccache-key.outputs.distro }}-${{ steps.ccache-key.outputs.arch }}-${{ steps.ccache-key.outputs.compiler }}-${{ steps.ccache-key.outputs.build-type }}-${{ steps.ccache-key.outputs.short-sha }}
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runs:
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using: composite
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steps:
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- name: Install ccache
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shell: bash
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run: |
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if ! command -v ccache &> /dev/null; then
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echo "Installing ccache..."
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if command -v apt-get &> /dev/null; then
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sudo apt-get update && sudo apt-get install -y ccache
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elif command -v brew &> /dev/null; then
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HOMEBREW_NO_AUTO_UPDATE=1 brew install ccache
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elif command -v choco &> /dev/null; then
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choco install ccache -y --no-progress
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else
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echo "::error::✗ Cannot install ccache: no supported package manager found"
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exit 1
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fi
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fi
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echo "ccache version: $(ccache --version | head -1)"
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- name: Calculate ccache key
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id: ccache-key
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shell: bash
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env:
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CMAKE_CONFIG_ARGS: ${{ inputs.cmake-config-args }}
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CMAKE_BUILD_TYPE: ${{ inputs.cmake-build-type }}
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run: |
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CCACHE_DIR="${{ github.workspace }}/.ccache"
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echo "dir=$CCACHE_DIR" >> "$GITHUB_OUTPUT"
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echo "CCACHE_DIR=$CCACHE_DIR" >> "$GITHUB_ENV"
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# Get OS and version (e.g., ubuntu-22.04, macos-14.0, windows-2022)
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if [[ "$OSTYPE" == "darwin"* ]]; then
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DISTRO="macos"
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VERSION=$(sw_vers -productVersion | cut -d. -f1,2)
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elif [[ "$OSTYPE" == "msys"* ]] || [[ "$OSTYPE" == "cygwin"* ]] || [[ -n "$WINDIR" ]]; then
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DISTRO="windows"
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VERSION="nt$(powershell -Command "[System.Environment]::OSVersion.Version.Major")"
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else
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DISTRO=$(lsb_release -is | tr '[:upper:]' '[:lower:]')
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VERSION=$(lsb_release -rs)
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fi
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echo "distro=${DISTRO}-${VERSION}" >> "$GITHUB_OUTPUT"
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# Get architecture (e.g., x86-64, arm64, x86-32)
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# Priority: 1) target-arch input, 2) -A flag from cmake args, 3) detect from host
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if [ -n "${{ inputs.target-arch }}" ]; then
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ARCH="${{ inputs.target-arch }}"
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else
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# Try to extract from CMake -A flag (e.g., -A Win32, -A x64, -A ARM64)
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CMAKE_ARCH=$(echo "$CMAKE_CONFIG_ARGS" | grep -oE '\-A\s*(Win32|x64|ARM64|ARM)' | awk '{print $2}' || true)
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if [ -n "$CMAKE_ARCH" ]; then
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case "$CMAKE_ARCH" in
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x64) ARCH="x86-64" ;;
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Win32) ARCH="x86-32" ;;
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ARM64) ARCH="arm64" ;;
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ARM) ARCH="arm32" ;;
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esac
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else
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ARCH=$(uname -m)
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case "$ARCH" in
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x86_64) ARCH="x86-64" ;;
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aarch64) ARCH="arm64" ;;
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armv7l) ARCH="arm32" ;;
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i686) ARCH="x86-32" ;;
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esac
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fi
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fi
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echo "arch=$ARCH" >> "$GITHUB_OUTPUT"
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# Extract compiler from cmake-config-args (e.g., gcc-12, clang-14)
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# Using sed instead of grep -P for cross-platform compatibility (Windows Git Bash lacks Perl regex)
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COMPILER=$(echo "$CMAKE_CONFIG_ARGS" | sed -n 's/.*-DCMAKE_CXX_COMPILER=\([^ ]*\).*/\1/p' | sed 's/+//g')
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if [ -z "$COMPILER" ]; then
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COMPILER="unknown"
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fi
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echo "compiler=$COMPILER" >> "$GITHUB_OUTPUT"
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# Build type in lowercase (e.g., release, debug)
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BUILD_TYPE=$(echo "$CMAKE_BUILD_TYPE" | tr '[:upper:]' '[:lower:]')
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echo "build-type=$BUILD_TYPE" >> "$GITHUB_OUTPUT"
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# Short commit hash
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SHORT_SHA=$(echo "${{ github.sha }}" | head -c 7)
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echo "short-sha=$SHORT_SHA" >> "$GITHUB_OUTPUT"
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# Cache key prefix (e.g., opendaq, test)
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PREFIX="${{ inputs.cache-key-prefix }}"
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if [ -n "$PREFIX" ]; then
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echo "prefix=${PREFIX}-" >> "$GITHUB_OUTPUT"
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else
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echo "prefix=" >> "$GITHUB_OUTPUT"
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fi
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- name: Restore ccache
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id: cache
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uses: actions/cache@v4
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with:
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path: ${{ steps.ccache-key.outputs.dir }}
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key: ccache-${{ steps.ccache-key.outputs.prefix }}${{ steps.ccache-key.outputs.distro }}-${{ steps.ccache-key.outputs.arch }}-${{ steps.ccache-key.outputs.compiler }}-${{ steps.ccache-key.outputs.build-type }}-${{ steps.ccache-key.outputs.short-sha }}
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restore-keys: |
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ccache-${{ steps.ccache-key.outputs.prefix }}${{ steps.ccache-key.outputs.distro }}-${{ steps.ccache-key.outputs.arch }}-${{ steps.ccache-key.outputs.compiler }}-${{ steps.ccache-key.outputs.build-type }}-
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ccache-${{ steps.ccache-key.outputs.prefix }}${{ steps.ccache-key.outputs.distro }}-${{ steps.ccache-key.outputs.arch }}-${{ steps.ccache-key.outputs.compiler }}-
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ccache-${{ steps.ccache-key.outputs.prefix }}${{ steps.ccache-key.outputs.distro }}-${{ steps.ccache-key.outputs.compiler }}-${{ steps.ccache-key.outputs.build-type }}-
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ccache-${{ steps.ccache-key.outputs.prefix }}${{ steps.ccache-key.outputs.distro }}-${{ steps.ccache-key.outputs.compiler }}-
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- name: Configure ccache
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shell: bash
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run: |
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ccache --set-config=cache_dir="$CCACHE_DIR"
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ccache --set-config=max_size=2G
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ccache --set-config=compression=true
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ccache -z # Zero statistics

‎.github/workflows/test-ccache-setup.yml‎

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name: Test ccache-setup action
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on:
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push:
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branches: [actions/ccache-setup]
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jobs:
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test:
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strategy:
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fail-fast: false
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matrix:
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include:
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- os: ubuntu-latest
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compiler: g++-12
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- os: ubuntu-24.04-arm
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compiler: g++-12
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- os: macos-latest
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compiler: clang++
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- os: windows-latest
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compiler: cl
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runs-on: ${{ matrix.os }}
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name: Test on ${{ matrix.os }}
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steps:
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- name: Checkout
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uses: actions/checkout@v4
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- name: Run ccache-setup
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id: ccache
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uses: ./.github/actions/ccache-setup
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with:
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cmake-config-args: '-DCMAKE_CXX_COMPILER=${{ matrix.compiler }}'
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cmake-build-type: Release
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cache-key-prefix: test
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- name: Verify ccache installed
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shell: bash
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run: |
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echo "=== ccache version ==="
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ccache --version
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- name: Verify environment
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shell: bash
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run: |
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echo "=== CCACHE_DIR ==="
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echo "$CCACHE_DIR"
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echo "=== Cache key ==="
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echo "${{ steps.ccache.outputs.cache-key }}"
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echo "=== Cache hit ==="
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echo "${{ steps.ccache.outputs.cache-hit }}"
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- name: Verify ccache configuration
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shell: bash
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run: |
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echo "=== ccache config ==="
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ccache -p | grep -E '(cache_dir|max_size|compression)'

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