# See https://wiki.debian.org/RaspberryPi3 for known issues and more details.

steps:
  - mkimg: "{{ output }}"
    size: 1500M

  - mklabel: msdos
    device: "{{ output }}"

  - mkpart: primary
    fs-type: 'fat32'
    device: "{{ output }}"
    start: 0%
    end: 20%
    part-tag: boot-part

  - mkpart: primary
    device: "{{ output }}"
    start: 20%
    end: 100%
    part-tag: root-part

  - mkfs: vfat
    partition: boot-part
    label: raspiboot

  - mkfs: ext4
    partition: root-part
    label: raspiroot

  - mount: root-part
    fs-tag: root-fs

  - mount: boot-part
    mount-on: root-fs
    dirname: '/boot/firmware'
    fs-tag: boot-fs

  # We need to use Debian buster (currently testing) instead of Debian stretch
  # (currently stable) for:
  #
  # linux ≥ 4.14
  #   Which includes the sdhost driver for faster SD card access and making the
  #   WiFi chip available, and has the WiFi driver enabled.
  #
  # raspi3-firmware ≥ 1.20171201-1
  #   Which includes a recent enough firmware version to correctly pass the MAC
  #   address to the kernel. This is a regression with Linux ≥ 4.12, see
  #   https://github.com/raspberrypi/firmware/issues/846
  #   Also, this package contains a Raspberry Pi 3-specific firmware file
  #   required by the WiFi driver.
  - qemu-debootstrap: buster
    mirror: http://deb.debian.org/debian
    target: root-fs
    arch: arm64
    components:
    - main
    - contrib
    - non-free

  # TODO(https://bugs.debian.org/877855): remove this workaround once
  # debootstrap is fixed
  - chroot: root-fs
    shell: |
      echo 'deb http://deb.debian.org/debian buster main contrib non-free' > /etc/apt/sources.list
      apt-get update

  - apt: install
    packages:
    - ssh
    - parted
    - dosfstools
    # Contains /lib/firmware/brcm/brcmfmac43430-sdio.bin (required for WiFi).
    - firmware-brcm80211
    - wireless-tools
    - wpasupplicant
    fs-tag: root-fs

  # TODO: install raspi3-firmware and linux-image-arm64 from buster once they
  # migrated in sufficiently recent versions.
  - chroot: root-fs
    shell: |
      echo 'deb http://deb.debian.org/debian unstable main contrib non-free' >> /etc/apt/sources.list
      echo 'APT::Default-Release "buster";' > /etc/apt/apt.conf.d/08default-release
      apt-get update
      apt-get -y --no-show-progress -t unstable install raspi3-firmware linux-image-arm64

  - shell: |
      echo "rpi3" > "${ROOT?}/etc/hostname"

      # '..VyaTFxP8kT6' is crypt.crypt('raspberry', '..')
      sed -i 's,root:[^:]*,root:..VyaTFxP8kT6,' "${ROOT?}/etc/shadow"

      sed -i 's,#PermitRootLogin prohibit-password,PermitRootLogin yes,g' "${ROOT?}/etc/ssh/sshd_config"

      install -m 644 -o root -g root fstab "${ROOT?}/etc/fstab"

      install -m 644 -o root -g root eth0 "${ROOT?}/etc/network/interfaces.d/eth0"

      mkdir -p "${ROOT?}/etc/iptables"
      install -m 644 -o root -g root rules.v4 "${ROOT?}/etc/iptables/rules.v4"
      install -m 644 -o root -g root rules.v6 "${ROOT?}/etc/iptables/rules.v6"

      install -m 755 -o root -g root rpi3-resizerootfs "${ROOT?}/usr/sbin/rpi3-resizerootfs"
      install -m 644 -o root -g root rpi3-resizerootfs.service "${ROOT?}/etc/systemd/system"
      mkdir -p "${ROOT?}/etc/systemd/system/systemd-remount-fs.service.requires/"
      ln -s /etc/systemd/system/rpi3-resizerootfs.service "${ROOT?}/etc/systemd/system/systemd-remount-fs.service.requires/rpi3-resizerootfs.service"

      install -m 644 -o root -g root rpi3-generate-ssh-host-keys.service "${ROOT?}/etc/systemd/system"
      mkdir -p "${ROOT?}/etc/systemd/system/multi-user.target.requires/"
      ln -s /etc/systemd/system/rpi3-generate-ssh-host-keys.service "${ROOT?}/etc/systemd/system/multi-user.target.requires/rpi3-generate-ssh-host-keys.service"
      rm -f ${ROOT?}/etc/ssh/ssh_host_*_key*

      cat >> "${ROOT?}/etc/motd" <<'EOT'

      Please change the root password by running passwd
      EOT
    root-fs: root-fs

  # Clean up archive cache (likely not useful) and lists (likely outdated) to
  # reduce image size by several hundred megabytes.
  - chroot: root-fs
    shell: |
      apt-get clean
      rm -rf /var/lib/apt/lists

  # Modify the kernel commandline we take from the firmware to boot from
  # the partition labeled raspiroot instead of forcing it to mmcblk0p2
  - chroot: root-fs
    shell: |
      sed -i 's/.dev.mmcblk0p2/LABEL=raspiroot/' /boot/firmware/cmdline.txt

  # TODO(https://github.com/larswirzenius/vmdb2/issues/24): remove once vmdb
  # clears /etc/resolv.conf on its own.
  - shell: |
      rm "${ROOT?}/etc/resolv.conf"
    root-fs: root-fs