#!/bin/sh
# Build one Debian package.
#   build-deb.sh <client|server> <version> <arch> <output.deb>
set -eu

kind=$1
version=$2
arch=$3
out=$4

root=$(cd "$(dirname "$0")/.." && pwd)
stage=$root/build/deb-$kind-$arch
rm -rf "$stage"

case $kind in
client)
	pkg=keeporg
	binary=keeporg
	mkdir -p "$stage/usr/bin" "$stage/usr/lib/systemd/user"
	install -m 0755 "$root/build/linux-$arch/keeporg" "$stage/usr/bin/keeporg"
	install -m 0644 "$root/packaging/systemd/keeporg.service" \
		"$stage/usr/lib/systemd/user/keeporg.service"
	;;
server)
	pkg=keeporgd
	binary=keeporgd
	mkdir -p "$stage/usr/bin" "$stage/usr/lib/systemd/system" "$stage/etc/keeporg"
	install -m 0755 "$root/build/linux-$arch/keeporgd" "$stage/usr/bin/keeporgd"
	install -m 0644 "$root/packaging/systemd/keeporgd.service" \
		"$stage/usr/lib/systemd/system/keeporgd.service"
	"$root/build/linux-$arch/keeporgd" -write-config "$stage/etc/keeporg/server.json" >/dev/null
	chmod 0640 "$stage/etc/keeporg/server.json"
	;;
*)
	echo "build-deb.sh: unknown package kind $kind" >&2
	exit 2
	;;
esac

mkdir -p "$stage/DEBIAN" "$stage/usr/share/doc/$pkg"
sed -e "s/@VERSION@/$version/" -e "s/@ARCH@/$arch/" \
	"$root/packaging/deb/$kind/control.in" > "$stage/DEBIAN/control"
install -m 0644 "$root/packaging/deb/copyright" "$stage/usr/share/doc/$pkg/copyright"
gzip -9nc "$root/packaging/deb/changelog" > "$stage/usr/share/doc/$pkg/changelog.Debian.gz"
chmod 0644 "$stage/usr/share/doc/$pkg/changelog.Debian.gz"

if [ "$kind" = server ]; then
	cat > "$stage/DEBIAN/conffiles" <<'CONF'
/etc/keeporg/server.json
CONF
	cat > "$stage/DEBIAN/postinst" <<'POST'
#!/bin/sh
set -e
if [ "$1" = configure ]; then
	if ! getent passwd keeporg >/dev/null; then
		adduser --system --group --home /var/lib/keeporg \
			--gecos "KeepOrg synchronization server" keeporg
	fi
	install -d -o keeporg -g keeporg -m 0700 /var/lib/keeporg
	chgrp keeporg /etc/keeporg/server.json || true
	chmod 0640 /etc/keeporg/server.json || true
	if [ -d /run/systemd/system ]; then
		systemctl daemon-reload || true
		echo "keeporgd: edit /etc/keeporg/server.json, then" \
		     "systemctl enable --now keeporgd" >&2
	fi
fi
exit 0
POST
	cat > "$stage/DEBIAN/prerm" <<'PRERM'
#!/bin/sh
set -e
if [ "$1" = remove ] && [ -d /run/systemd/system ]; then
	systemctl stop keeporgd || true
fi
exit 0
PRERM
	chmod 0755 "$stage/DEBIAN/postinst" "$stage/DEBIAN/prerm"
fi

mkdir -p "$(dirname "$out")"
fakeroot dpkg-deb --root-owner-group --build "$stage" "$out" >/dev/null
printf 'built %s (%s %s %s)\n' "$out" "$binary" "$version" "$arch"