build.yml

name: "Build"

on:
  push:
    branches:
      - master
    paths:
      - 'distro-build/**'
  pull_request:
    paths:
      - 'distro-build/**'
  workflow_dispatch:
    inputs:
      distributions:
        description: 'A space-seperated values what distribution shall be built'
        required: true

jobs:
  build:
    # Ubuntu 22.04 has the up-to-date version of mmdebstrap
    runs-on: ubuntu-22.04
    steps:
      - name: Checkout Repository
        uses: actions/checkout@v3
        with:
          fetch-depth: 0
      - name: Gather distributions that is needed to be built
        run: |
          if [ "${{ github.event_name }}" != "workflow_dispatch" ]; then
            # gather files changed on the latest HEAD commit
            if [ "${{ github.event_name }}" == "pull_request" ]; then
              # process latest commit made from the PR through github.event.pull_request.head.sha context
              git diff-tree --no-commit-id --name-only ${{ github.event.pull_request.head.sha }} -r > ./files_changed.txt
            else
              git diff-tree --no-commit-id --name-only HEAD -r > ./files_changed.txt
            fi

            # check if files are changed or created are in distro-build directory
            if ! grep -q distro-build ./files_changed.txt; then
              echo "The latest commit does not have any distribution build script changed or added"
              exit 1
            fi

            # filter only files from distro-build directory only
            grep distro-build ./files_changed.txt | sed 's@\(distro-build/\|.sh\)@@g' > ./distributions.txt
          else
            echo "${{ github.event.inputs.distributions }}" > ./distributions.txt
          fi

          # Remove distro plugins to filter and upload built distributions and its plugins later on
          rm -rf ./distro-plugins/*
      - name: Install Needed Dependencies
        run: sudo apt-get install curl jq mmdebstrap qemu-user-static binfmt-support -yq
      - name: Build distribution rootfs
        run: |
          for distros_to_be_built in $(cat ./distributions.txt); do
            # check if a specified distribution build recipe exists incase for workflow dispatch inputs
            if [ ! -f ./distro-build/${distros_to_be_built}.sh ]; then
              echo "Cannot build distribution ${distros_to_be_built}: no such file or directory"
              exit 2
            fi
            ./bootstrap-rootfs.sh ${distros_to_be_built}
          done
      # Upload Artifacts separately per architecture
      - name: Upload Artifacts (aarch64)
        uses: actions/upload-artifact@v3
        with:
          name: built-rootfs-aarch64
          path: rootfs/*aarch64*.tar.xz
          if-no-files-found: ignore
      - name: Upload Artifacts (arm)
        uses: actions/upload-artifact@v3
        with:
          name: built-rootfs-arm
          path: rootfs/*arm*.tar.xz
          if-no-files-found: ignore
      - name: Upload Artifacts (i686)
        uses: actions/upload-artifact@v3
        with:
          name: built-rootfs-i686
          path: rootfs/*i686*.tar.xz
          if-no-files-found: ignore
      - name: Upload Artifacts (x86_64)
        uses: actions/upload-artifact@v3
        with:
          name: built-rootfs-x86_64
          path: rootfs/*x86_64*.tar.xz
          if-no-files-found: ignore
      # Upload distro plugins
      - name: Upload Artifacts (distro plugins)
        uses: actions/upload-artifact@v3
        with:
          name: distro-plugins
          path: distro-plugins/*.sh