#!/usr/bin/env bash
# Builds every template in srcpkgs/ with xbps-src into the local repository
# out/hostdir/binpkgs. Runs inside the builder container, see scripts/builder.sh.
#
# xbps-src needs the whole void-packages tree (build styles, shared hooks), so our
# templates are overlaid onto a shallow clone of it in out/void-packages.
set -euo pipefail

vp=/work/out/void-packages
hostdir=/work/out/hostdir

# xbps-src refuses to run as root. Like Void's own CI, build as an unprivileged
# member of xbuilder (allowed to use xbps-uchroot); the host's UID keeps out/ owned by the user.
useradd --uid "$HOST_UID" --groups xbuilder --no-create-home builder
as_builder() {
  sudo --preserve-env=HOME -u builder "$@"
}
export HOME=/tmp
mkdir -p "$hostdir"
chown "$HOST_UID:$HOST_GID" /work/out "$hostdir"

if [[ -d $vp/.git ]]; then
  echo "==> Updating void-packages"
  as_builder git -C "$vp" fetch --quiet --depth 1 origin master
  as_builder git -C "$vp" reset --quiet --hard FETCH_HEAD
  as_builder git -C "$vp" clean --quiet -fd srcpkgs
else
  echo "==> Cloning void-packages"
  as_builder git clone --quiet --depth 1 https://github.com/void-linux/void-packages "$vp"
fi

cat > "$vp/etc/conf" <<CONF
XBPS_CHROOT_CMD=uchroot
XBPS_MAKEJOBS=$(nproc)
CONF

names=()
for dir in /work/srcpkgs/*/; do
  name=$(basename "$dir")
  if git -C "$vp" cat-file -e "HEAD:srcpkgs/$name/template" 2>/dev/null; then
    echo "warning: $name is now in void-packages, consider dropping our template" >&2
  fi
  rm -rf "$vp/srcpkgs/$name"
  # A subpackage is a link to its source package's directory and is built with it
  if [[ -L ${dir%/} ]]; then
    as_builder ln -s "$(readlink "${dir%/}")" "$vp/srcpkgs/$name"
    continue
  fi
  as_builder cp -rL "$dir" "$vp/srcpkgs/$name"
  names+=("$name")
done

cd "$vp"
# The bootstrapped masterdir stays in out/void-packages, so later builds skip this step
if [[ ! -f masterdir-x86_64/.xbps_chroot_init ]]; then
  as_builder ./xbps-src -H "$hostdir" binary-bootstrap
fi
# A failed build leaves its destdir behind, and the next build of that package
# (also as a dependency of another one) would package the stale files
rm -rf masterdir-x86_64/destdir/*
for name in "${names[@]}"; do
  echo "==> Building $name"
  as_builder ./xbps-src -H "$hostdir" -f pkg "$name"
done

echo "==> Repository: $hostdir/binpkgs"
ls -1 "$hostdir"/binpkgs/*.xbps