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diff --git a/docs/ci.md b/docs/ci.md new file mode 100644 index 0000000..d0695b7 --- /dev/null +++ b/docs/ci.md @@ -0,0 +1,68 @@ +`ci-boost` and `ci-cmake` are thin wrappers around `boost-download`/`boost-build` +and `cmake-build` accordingly. They work by reading environment variables and +passing their values as command line parameters to the more generic scripts. +This facilitates matrix-building the project without too much fuss. + +For example, the following Travis workflow: + +``` +language: cpp +os: linux +dist: focal + +env: + global: + BOOST_VERSION: 1.65.0 + jobs: + - CONFIGURATION=Debug PLATFORM=x64 + - CONFIGURATION=Release PLATFORM=x64 + +before_script: ci-boost -- --with-filesystem +script: ci-cmake --install +``` + +is roughly equivalent to running + +``` +boost-download --cache "$TRAVIS_BUILD_DIR/../build" -- 1.65.0 +mv -- \ + "$TRAVIS_BUILD_DIR/../build/boost_1_65_0" \ + "$TRAVIS_BUILD_DIR/../build/boost" + +boost-build \ + --platform x64 \ + --configuration Debug Release \ + -- \ + "$TRAVIS_BUILD_DIR/../build/boost" \ + --with-filesystem + +for configuration in Debug Release; do + cmake-build \ + --platform x64 \ + --configuration "$configuration" \ + --boost "$TRAVIS_BUILD_DIR/../build/boost" \ + --build "$TRAVIS_BUILD_DIR/../build/cmake" \ + --install "$TRAVIS_BUILD_DIR/../build/install" \ + -- \ + "$TRAVIS_BUILD_DIR" +done +``` + +Caching +------- + +`ci-boost` downloads the Boost distribution archive to the "../build/" +directory (resolved relatively to the root checkout directory). You can cache +the archive like this (using GitHub Actions as an example): + +``` +- name: Cache Boost + uses: actions/cache@v2 + with: + path: '${{ runner.workspace }}/build/boost_*.tar.gz' + key: 'boost_${{ env.BOOST_VERSION }}' + +- name: Build Boost + # This won't re-download the archive unnecessarily. + run: ci-boost -- --with-filesystem +``` |