#!/bin/env zsh

set -e

# Massive credit to the B.Watson for the SlackBuilds.org script. This is
# essentially the same SlackBuild, except that it checks out the source
# from git.

PRGNAM=gzdoom
USER=coelckers
REPO=https://github.com/${USER}/${PRGNAM}.git

BUILD=1
TAG=dc

TMP=${TMP:-/tmp}
PKG=$TMP/package-$PRGNAM

if [[ -z $ARCH ]]; then
	case $( uname -m ) in
		i?86) ARCH=i486 ;;
		arm*) ARCH=arm ;;
		*) ARCH=$( uname -m ) ;;
	esac
fi

CWD=$PWD

HEADER="Accept: application/vnd.github.v3.raw+json"
PARSER=$(cat <<-END
# Get the latest version
import json
import re
import sys

for release in json.load(sys.stdin):
    # This would be the latest non-pre release:
    if re.match(r'^g\d.\d.\d$', release['name']):
        print release['name']
        break
END
)
ENDPOINT="https://api.github.com/repos/${USER}/${PRGNAM}/tags"

VERSION=$(curl -H $HEADER $ENDPOINT | python -c $PARSER)

rm -rf $PKG
rm -rf ${TMP}/${PRGNAM}-${VERSION}
rm -f ${TMP}/${PRGNAM}-${VERSION}.tar.gz

cd $TMP

wget https://github.com/coelckers/${PRGNAM}/archive/${VERSION}/${PRGNAM}-${VERSION}.tar.gz
tar xf ${PRGNAM}-${VERSION}.tar.gz

cd ${PRGNAM}-${VERSION}

wget https://raw.githubusercontent.com/Ponce/slackbuilds/current/games/${PRGNAM}/${PRGNAM}.png
wget https://raw.githubusercontent.com/Ponce/slackbuilds/current/games/${PRGNAM}/${PRGNAM}.desktop
wget https://raw.githubusercontent.com/Ponce/slackbuilds/current/games/${PRGNAM}/slack-desc
wget https://raw.githubusercontent.com/Ponce/slackbuilds/current/games/${PRGNAM}/doinst.sh

chown -R root:root .
find -L . \
	\( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
	-o -perm 511 \) -exec chmod 755 {} \; -o \
	\( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
	-o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;


mkdir -p build
cd build
cmake \
    -DCMAKE_INSTALL_PREFIX=/usr \
    -DCMAKE_BUILD_TYPE=Release ..
make
mkdir -p $PKG/usr/bin $PKG/usr/share/games/doom
install -m0755 -s $PRGNAM $PKG/usr/bin/$PRGNAM
install -m0644 *.pk3 $PKG/usr/share/games/doom/

cd -

find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
	| cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

# .desktop written for this SlackBuild
mkdir -p $PKG/usr/share/applications
cat $TMP/${PRGNAM}-${VERSION}/${PRGNAM}.desktop > $PKG/usr/share/applications/${PRGNAM}.desktop

# PNG converted from Windows icon
mkdir -p $PKG/usr/share/pixmaps
cat $TMP/${PRGNAM}-${VERSION}/${PRGNAM}.png > $PKG/usr/share/pixmaps/${PRGNAM}.png

mkdir -p $PKG/usr/doc/${PRGNAM}-${VERSION}
cp -a docs/* $PKG/usr/doc/${PRGNAM}-${VERSION}

mkdir -p $PKG/install
cat $TMP/${PRGNAM}-${VERSION}/slack-desc > $PKG/install/slack-desc
cat $TMP/${PRGNAM}-${VERSION}/doinst.sh > $PKG/install/doinst.sh

cd $PKG
/sbin/makepkg -l y -c n ${TMP}/${PRGNAM}-${VERSION}-${ARCH}-${BUILD}${TAG}.txz