image: gcc

variables:
  # Set `CCACHE_BASEDIR` and `CCACHE_DIR` to point `ccache` towards the cached
  # path on the gitlab-runner. This enables to cache the output of `ccache`
  # between various runs.
  CCACHE_BASEDIR: "${CI_PROJECT_DIR}"
  CCACHE_DIR: "${CI_PROJECT_DIR}/ccache"
  # Set `ccache` to `content` to prevent rebuilding of the CI/CD containers to
  # trigger a recreate of the cache. By using `content` the compiler's `mtime`
  # is not considered as part of the hash.
  CCACHE_COMPILERCHECK: "content"
  # Enable caching for `apt-get`.
  APT_CACHE_DIR: "${CI_PROJECT_DIR}/apt-cache"
  # Export `noninteractive` frontend to prevent requesting user input.
  DEBIAN_FRONTEND: "noninteractive"

build-and-test:
  stage: build
  cache:
    # Cache is shared between branches, but has a unique cache per job.
    key: dereko2vec
    paths:
      # Note: directories should align with `$APT_CACHE_DIR` and `$CCACHE_DIR`.
      - apt-cache/
      - ccache/

  before_script:
    - pwd
    - source `find .. -name section_helper.sh`

    - start_section install_linux_packages "Installing missing Linux packages"
    - mkdir -pv $APT_CACHE_DIR ccache
    - apt-get update && apt-get -o dir::cache::archives="$APT_CACHE_DIR" -y install ccache cmake librocksdb-dev libgflags-dev libsnappy-dev zlib1g-dev libbz2-dev liblz4-dev libzstd-dev libomp-dev
    # ccache only makes the build faster, it must never be able to make it
    # fail, so it is wired in through compiler symlinks only when it is there
    - if CCACHE=$(command -v ccache); then ln -sf "$CCACHE" /usr/local/sbin/gcc && ln -sf "$CCACHE" /usr/local/sbin/g++; else echo "ccache is not available - building without it"; fi
    - end_section install_linux_packages

  script:
    # Debian ships the static rocksdb in librocksdb-dev, so install.sh builds
    # no rocksdb here. --static-binary keeps the artifact a completely static
    # binary. ccache works through the compiler symlinks set up above.
    - start_section build_dereko2vec "Building and testing dereko2vec"
    - scripts/install.sh --skip-deps --static-binary
    - command -v ccache > /dev/null && ccache --show-stats || true
    - end_section build_dereko2vec

  artifacts:
    paths:
      - build/dereko2vec