# 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%
    tag: /boot

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

  - kpartx: "{{ output }}"

  - mkfs: vfat
    partition: /boot
    label: RASPIFIRM

  - mkfs: ext4
    partition: /
    label: RASPIROOT

  - mount: /

  - mount: /boot
    mount-on: /
    dirname: '/boot/firmware'

  - unpack-rootfs: /

  # 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: /
    arch: armel
    components:
    - main
    - contrib
    - non-free
    unless: rootfs_unpacked

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

  - apt: install
    packages:
    - ssh
    - parted
    - dosfstools
    # Contains /lib/firmware/brcm/brcmfmac43430-sdio.bin (required for WiFi).
    - firmware-brcm80211
    - wireless-tools
    - wpasupplicant
    - raspi3-firmware
    - linux-image-rpi
    tag: /
    unless: rootfs_unpacked

  - cache-rootfs: /
    unless: rootfs_unpacked

  - shell: |
      echo "rpi-z" > "${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*

      cp "${ROOT?}/usr/lib/linux-image-4.19.0.5-rpi/bcm2835-rpi-zero-w.dtb" "${ROOT?}/boot/"

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

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

  # Clean up archive cache (likely not useful) and lists (likely outdated) to
  # reduce image size by several hundred megabytes.
  - chroot: /
    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
  #
  # Enable UART in the boot loader to debug
  # 
  # Tell start.elf that the kernel is upstream, so the BCM2835 dtb gets loaded
  # From:
  # https://www.raspberrypi.org/forums/viewtopic.php?p=1456353&sid=4fb9bf969c9ef5594f38e028b36e39c6#p1456353
  #
  - chroot: /
    shell: |
      ls -aR /boot
      sed -i 's/.dev.mmcblk0p2/LABEL=RASPIROOT/' /boot/firmware/cmdline.txt
      sed -i 's/BOOT_UART=0/BOOT_UART=1/' /boot/firmware/bootcode.bin
      sed -i '/enable_uart=1/a upstream_kernel=1' /boot/firmware/config.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: /