image: debian:10

cache:
    when: always
    paths:
        - ccache

build:
    stage: build
    before_script:
        - apt-get update
        # one package per line to simplify sorting, git diff, etc.
        - >-
            apt-get -y install
            ccache
            git
            make
            sudo
        - export PATH="/usr/lib/ccache:$PATH"
        - export CCACHE_BASEDIR="$PWD"
        - export CCACHE_DIR="$PWD/ccache"
        - export CCACHE_COMPILERCHECK=content
        - ccache --zero-stats || true
        - ccache --show-stats || true
    script:
        - make -j$(nproc)