#!/usr/bin/env bash
# -*- vim: set expandtab tabstop=2 shiftwidth=2:
#
# Build a container ready to build the documentation be reading the dependencies
# listed in shell scripts in documentation/tools/host_packages_scripts, and
# start a documentation build in this container.
#
# Usage:
#
#   ./documentation/tools/build-docs-container <image> [<make target>]
#
# e.g.:
#
#   ./documentation/tools/build-docs-container ubuntu:24.04 html
#
# Will build the docs in an Ubuntu 24.04 container in html.
#
# The container engine can be selected by exporting CONTAINERCMD in the
# environment. The default is docker, but podman can also be used.

set -eu -o pipefail

SCRIPT_DIR=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &>/dev/null && pwd)
CONTAINERCMD=${CONTAINERCMD:-docker}
DOCS_DIR="$SCRIPT_DIR/../.."
SH_DIR="$SCRIPT_DIR/host_packages_scripts"

function usage()
{
  echo "$0 -- script to build documentation from within a container

$0 OCI_IMAGE [make arguments...]

   OCI_IMAGE is an image:tag of an OCI image hosted on hub.docker.com. It is one
   of:
     - debian:12
     - fedora:38
     - fedora:39
     - fedora:40
     - leap:15.4
     - leap:15.5
     - ubuntu:22.04
     - ubuntu:24.04

   [make arguments] is one or more argument to pass to the make command of
   documentation/Makefile, see that file for what's supported. This is typically
   intended to be used to provide specific make targets.
   Default: publish
"
}

main ()
{
  if [ "$#" -lt 1 ]; then
    usage
    exit 1
  fi

  local image="$1"
  shift

  OCI=$(which "$CONTAINERCMD")

  # docker build doesn't accept 2 colons, so "sanitize" the name
  local sanitized_dockername
  sanitized_dockername=$(echo "$image" | tr ':.' '-')

  local version
  version=$(echo "$image" | awk -F: '{print $NF}')

  case $image in
    # Missing latexmk texlive-gnu-freefont packages at the very least
    # "almalinux:8"*|\
    # "almalinux:9"*)
    #   containerfile=Containerfile.almalinux
    #   docs=almalinux_docs.sh
    #   docs_pdf=almalinux_docs_pdf.sh
    #   pip3=pip3_docs.sh
    #   ;;
    # Missing python3-saneyaml
    # "debian:11"*|\
    "debian:12"*)
      containerfile=Containerfile.debian
      docs=ubuntu_docs.sh
      docs_pdf=ubuntu_docs_pdf.sh
      ;;
    "fedora:38"*|\
    "fedora:39"*|\
    "fedora:40"*)
      containerfile=Containerfile.fedora
      docs=fedora_docs.sh
      docs_pdf=fedora_docs_pdf.sh
      pip3=pip3_docs.sh
      ;;
    "leap:15.4"*|\
    "leap:15.5"*)
    # Seems like issue with permissions package, c.f.
    #
    # Updating /etc/sysconfig/security ...
    # /dev/zero: chown: Permission denied
    # /dev/null: chown: Permission denied
    # /dev/full: chown: Permission denied
    # ERROR: not all operations were successful.
    # Checking permissions and ownerships - using the permissions files
    # 	/etc/permissions
    # 	/etc/permissions.easy
    # 	/etc/permissions.local
    # setting / to root:root 0755. (wrong permissions 0555)
    # setting /dev/zero to root:root 0666. (wrong owner/group 65534:65534)
    # setting /dev/null to root:root 0666. (wrong owner/group 65534:65534)
    # setting /dev/full to root:root 0666. (wrong owner/group 65534:65534)
    # warning: %post(permissions-20240826-150600.10.12.1.x86_64) scriptlet failed, exit status 1
    #
    # "leap:15.6"*)
      image=opensuse/leap:$version
      containerfile=Containerfile.zypper
      docs=opensuse_docs.sh
      docs_pdf=opensuse_docs_pdf.sh
      pip3=pip3_docs.sh
      ;;
    # Missing python3-saneyaml
    # "ubuntu:18.04"*|\
    # "ubuntu:20.04"*|\
    # Cannot fetch packages anymore
    # "ubuntu:23.04"*|\
    "ubuntu:22.04"*|\
    "ubuntu:24.04"*)
      containerfile=Containerfile.ubuntu
      docs=ubuntu_docs.sh
      docs_pdf=ubuntu_docs_pdf.sh
      ;;
    *)
      echo "$image not supported!"
      usage
      exit 1
      ;;
  esac

  $OCI build \
    --tag "yocto-docs-$sanitized_dockername:latest" \
    --build-arg ARG_FROM="docker.io/$image" \
    --build-arg DOCS="$docs" \
    --build-arg DOCS_PDF="$docs_pdf" \
    --build-arg PIP3="${pip3:-}" \
    --file "$SCRIPT_DIR/$containerfile" \
    "$SH_DIR/"

  local -a args_run=(
    --rm
    --interactive
    --tty
    --volume="$DOCS_DIR:/docs:rw"
    --workdir=/docs
    --security-opt label=disable
  )

  if [ "$OCI" = "docker" ]; then
    args_run+=(
      --user="$(id -u)":"$(id -g)"
    )
  elif [ "$OCI" = "podman" ]; then
    # we need net access to fetch bitbake terms
    args_run+=(
      --cap-add=NET_RAW
      --userns=keep-id
    )
  fi

  $OCI run \
    "${args_run[@]}" \
    "yocto-docs-$sanitized_dockername" \
    "$@"
}

main "$@"