main.yml

name: Build

on:
  push:
  pull_request:
  workflow_dispatch:

jobs:
  build_all_packages:
    runs-on: ubuntu-22.04
    container:
      image: archlinux/archlinux:latest
      options: --security-opt=seccomp=unconfined

    steps:
      - uses: actions/checkout@v4

      - name: Build and install Arch Linux's SELinux support packages in a docker container
        run: |
          mkdir -vp /startdir && \
          cp -Rv . /startdir && \
          pacman -q --noconfirm -Syu base base-devel expect git && \
          pacman --noconfirm -Sc && \
          curl -sSO https://archive.archlinux.org/packages/l/libxml2/libxml2-2.12.7-1-x86_64.pkg.tar.zst && \
          pacman --noconfirm -U libxml2-2.12.7-1-x86_64.pkg.tar.zst && \
          rm libxml2-2.12.7-1-x86_64.pkg.tar.zst && \
          rm -rf /var/cache/pacman/pkg/* && \
          ln -sf /usr/share/zoneinfo/UTC /etc/localtime && \
          useradd -g users -m builduser && \
          echo 'builduser ALL=(ALL) NOPASSWD: /usr/bin/pacman' >> /etc/sudoers && \
          echo 'builduser ALL=(ALL) NOPASSWD: /usr/bin/sh -c { pacman --noconfirm --ask=4 -U sudo-selinux/sudo-selinux-*.pkg.tar.zst && if test -e /etc/sudoers.pacsave ; then mv /etc/sudoers.pacsave /etc/sudoers ; fi }' >> /etc/sudoers && \
          echo 'MAKEFLAGS="-j$(nproc)"' >> /etc/makepkg.conf && \
          echo 'BUILDDIR=/build' >> /etc/makepkg.conf && \
          echo 'LOGDEST=/logdest' >> /etc/makepkg.conf && \
          mkdir -vp /packages /build /logdest && \
          chown -R builduser /startdir /packages /build /logdest && \
          sudo -u builduser /startdir/clean.sh && \
          sudo -u builduser /startdir/recv_gpg_keys.sh && \
          sudo -u builduser git config --global http.postBuffer 536870912 && \
          sudo -u builduser /startdir/build_and_install_all.sh && \
          rm -rf /startdir/*/src/ /startdir/*/pkg/ && \
          pacman --noconfirm -Sc && rm -rf /var/cache/pacman/pkg/* && \
          cp /startdir/*/*.pkg.tar.zst /packages

      - name: Upload packages as artifacts
        uses: actions/upload-artifact@v4
        with:
          name: Arch Linux packages for SELinux support
          path: /packages

  prepare_testing:
    runs-on: ubuntu-22.04
    needs: build_all_packages
    steps:
      - name: Install QEMU to the runner and make needed directories
        run: |
          sudo apt-get update
          sudo apt-get install qemu-utils
          mkdir -v repo /tmp/{boots,arch}

      - name: Download latest ArchISO bootstrap image
        run: |
          echo "Downloading archlinux-bootstrap-x86_64.tar.zst"
          curl -LO "https://geo.mirror.pkgbuild.com/iso/latest/archlinux-bootstrap-x86_64.tar.zst"

      - name: Create new raw image for Arch Linux and mount it as a loop device
        run: |
          qemu-img create -f raw archselinux.raw 8G
          LOOP_DEVICE="$(sudo losetup --show -f -P archselinux.raw)"
          echo "LOOP_DEVICE=${LOOP_DEVICE}" >> "$GITHUB_ENV"
          echo "Using loop device ${LOOP_DEVICE}"
          sudo parted "${LOOP_DEVICE}" mklabel msdos
          sudo parted -a optimal "${LOOP_DEVICE}" mkpart primary 0% 100%
          sudo parted "${LOOP_DEVICE}" set 1 boot on
          sudo mkfs.ext4 "${LOOP_DEVICE}p1"
          sudo tune2fs -L ROOT "${LOOP_DEVICE}p1"
          sudo mount "${LOOP_DEVICE}p1" /tmp/arch

      - name: Get the SELinux packages from build job
        uses: actions/download-artifact@v4
        with:
          name: Arch Linux packages for SELinux support
          path: repo

      - name: Prepare arch-bootstrap directory, chroot into it and install Arch with SELinux support to loop-mounted raw image
        run: |
          sudo tar xf archlinux-bootstrap-x86_64.tar.zst -C /tmp/boots --strip-components 1
          sudo cp -v repo/* /tmp/boots/var/cache/pacman/pkg
          sudo /tmp/boots/usr/bin/arch-chroot /tmp/boots /bin/bash -ex -c \
           'pacman-key --init;
            pacman-key --populate archlinux;
            mount "'"${LOOP_DEVICE}p1"'" /mnt;
            echo "Server = https://geo.mirror.pkgbuild.com/\$repo/os/\$arch" >> /etc/pacman.d/mirrorlist;
            sed -i -e 's/^CheckSpace/#CheckSpace/' /etc/pacman.conf;
            pacman --noconfirm -Sy archlinux-keyring;
            rm /var/cache/pacman/pkg/archlinux-keyring*;
            echo -e "[selinux-testing]\nSigLevel = Never\nServer = file:///var/cache/pacman/pkg" >> /etc/pacman.conf;
            repo-add /var/cache/pacman/pkg/selinux-testing.db.tar.xz /var/cache/pacman/pkg/*;
            pacstrap /mnt base-selinux base-devel-selinux openssh-selinux linux grub;
            genfstab -L /mnt >> /mnt/etc/fstab'

      - name: Make testing configurations for the raw image
        run: |
          sudo /tmp/boots/usr/bin/arch-chroot /tmp/arch /bin/bash -ex -c \
           'ln -sfv /usr/share/zoneinfo/UTC /etc/localtime;
            hwclock --systohc;
            sed -i 's/#en_US.UTF-8/en_US.UTF-8/' /etc/locale.gen;
            locale-gen;
            echo LANG=en_US.UTF-8 > /etc/locale.conf;
            echo qemu-arch-selinux > /etc/hostname;
            echo -e "127.0.0.1 localhost\n::1 localhost" > /etc/hosts;
            echo -e "[Match]\nName=en*\n[Network]\nDHCP=ipv4" > /etc/systemd/network/dhcp.network;
            systemctl enable systemd-networkd.service;
            sed -i "s/#PermitRootLogin prohibit-password/PermitRootLogin yes/" /etc/ssh/sshd_config;
            sed -i "s/#PermitEmptyPasswords no/PermitEmptyPasswords yes/" /etc/ssh/sshd_config;
            systemctl enable sshd;
            sed -i 's/root:x:/root::/' /etc/passwd;
            grub-install --target=i386-pc "'"${LOOP_DEVICE}"'";
            sed -i 's/GRUB_TIMEOUT=5/GRUB_TIMEOUT=0/' /etc/default/grub;
            sed -i "/LINUX_DEF/c\GRUB_CMDLINE_LINUX_DEFAULT=\"lsm=lockdown,yama,selinux,bpf selinux=1 console=ttyS0\"" /etc/default/grub;
            grub-mkconfig -o /boot/grub/grub.cfg;
            restorecon -RF /'

      - name: Unmount loop devices and convert the QEMU image to qcow2
        run: |
          sudo umount /tmp/boots/mnt
          sudo umount /tmp/arch
          sudo losetup -d "${LOOP_DEVICE}"
          qemu-img convert -f raw -O qcow2 archselinux.raw archselinux.qcow2

      - name: Upload VM to artifacts
        uses: actions/upload-artifact@v4
        with:
          name: Arch Linux VM with SELinux support
          path: archselinux.qcow2

  test_SELinux_functionality:
    runs-on: ubuntu-22.04
    needs: prepare_testing
    steps:
      - uses: actions/checkout@v4

      - name: Install QEMU to the runner and make needed directories
        run: |
          sudo apt-get update
          sudo apt-get install qemu-system-x86 qemu-utils

      - name: Download VM artifact for testing
        uses: actions/download-artifact@v4
        with:
          name: Arch Linux VM with SELinux support

      - name: Use the initial VM image as a backing file
        run: |
          qemu-img create -f qcow2 -F qcow2 -b archselinux.qcow2 archselinux_test.qcow2

      - name: Run test commands on the image
        run: |
          qemu-system-x86_64 archselinux_test.qcow2 \
            -net nic -net user,hostfwd=tcp::10022-:22 \
            -nographic -m 2048 &
          sleep 25
          for TRY_COUNT in $(seq 5) ; do
            if timeout 60 ssh -o "StrictHostKeyChecking=no" root@localhost -p 10022 true ; then
              break
            fi
            echo "Failed to connect to the VM after $TRY_COUNT attempts, retrying..."
            sleep 10
          done
          ssh -o "StrictHostKeyChecking=no" root@localhost -p 10022 'restorecon -Rv /; ls -laZ /; sestatus'

      - name: Upload the qcow2 file containing VM image changes to artifacts
        uses: actions/upload-artifact@v4
        with:
          name: Arch Linux VM after tests and restorecon
          path: archselinux_test.qcow2

  prepare_release:
    runs-on: ubuntu-22.04
    needs: test_SELinux_functionality
    steps:
      - name: Prepare Arch specific binaries for use
        run: |
          mkdir -v /tmp/boots
          echo "Downloading archlinux-bootstrap-x86_64.tar.zst"
          curl -LO "https://geo.mirror.pkgbuild.com/iso/latest/archlinux-bootstrap-x86_64.tar.zst"
          sudo tar xf archlinux-bootstrap-x86_64.tar.zst -C /tmp/boots --strip-components 1
          mkdir -v /tmp/boots/repo

      - name: Get the SELinux packages from build job
        uses: actions/download-artifact@v4
        with:
          name: Arch Linux packages for SELinux support
          path: /tmp/boots/repo

      - name: Create package repository files
        run: |
          sudo /tmp/boots/usr/bin/arch-chroot /tmp/boots /bin/bash -c \
           'repo-add /repo/selinux.db.tar.xz /repo/*'

      - name: Upload the ready repository as an artifact
        uses: actions/upload-artifact@v4
        with:
          name: SELinux pacman repository
          path: /tmp/boots/repo

  release:
    runs-on: ubuntu-22.04
    needs: prepare_release
    if: github.ref == 'refs/heads/master'
    steps:
      - name: Get packages from build artifacts
        uses: actions/download-artifact@v4
        with:
          name: SELinux pacman repository
          path: release

      # Like https://github.com/ame-yu/action-delete-latest-release
      - name: Remove old release
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const { owner, repo } = context.repo
            const { data: { id } } = await github.rest.repos.getLatestRelease({ owner, repo })
            await github.rest.repos.deleteRelease({ owner, repo, release_id: id })

      - name: Release all packages
        uses: softprops/action-gh-release@v1
        with:
          tag_name: ArchLinux-SELinux
          files: release/*
          body: |
            # Arch Linux packages to enable SELinux support
            https://wiki.archlinux.org/index.php/SELinux

            Latest commit:
            ```
            ${{ github.event.head_commit.message }}
            ```
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}