cross.yml

name: docker cross build
on: [push, pull_request]

# Notes:
#
# - There is harmless warning:
#
#     "[Warning] The requested image's platform (linux/arm64/v8) does not
#     match the detected host platform (linux/amd64) and no specific
#     platform was requested"
#
#   It's hard to remove, perhaps, because we using 'build' and not 'buildx',
#   which requires more setup.
#
# - git clean is not necessarily on GA, but added so it's easier to copy-paste
#   Dockerfile for manual runs.

jobs:
    cross:
        runs-on: ubuntu-22.04
        strategy:
            fail-fast: false
            matrix:
                include:
                    - image: arm64v8/ubuntu:jammy
                      platform: linux/arm64
                      packages: libelf-dev linux-headers-generic
                    - image: arm32v7/alt:latest
                      platform: linux/arm/v7
                      packages: elfutils kernel-headers-modules-std-def
                    - image: i386/ubuntu:bionic
                      platform: linux/386
                      packages: libelf-dev linux-headers-generic
        steps:
            - uses: docker/setup-qemu-action@v2
            - uses: actions/checkout@v3
            - name: Create Dockerfile
              run: |
                  cat <<EOF >Dockerfile
                  FROM ${{ matrix.image }}
                  RUN apt-get -y update && \
                      apt-get install -y git file gcc make ${{ matrix.packages }}
                  WORKDIR /src
                  COPY . .
                  RUN git clean -dxfq
                  RUN gcc -v; cat /etc/os-release
                  RUN make -j\$(nproc) KERNELRELEASE=\$(cd /lib/modules; ls)
                  RUN file lkrg.ko
                  EOF
            - run: docker build --platform=${{ matrix.platform }} .

# vim: sw=4