#!/bin/sh

# Default to using the first specfile in the current directory
SPEC="*.spec"
OPTS="-ba"

SIGN=0
KEY=""

BUILD=".build"
RPMS="out"

usage() {
	echo "Usage: $0 [OPTION]..."
	echo "Wrapper for rpmbuild that is easier to use."
	echo
	echo "Options:"
	echo "    -h    This help message"
	echo "    -f    The specfile to build from"
	echo "    -c    Clean the build artifacts"
	echo "    -s    Sign the produced RPM packages"
	echo "    -k    The GPG key to use for signing"
	exit
}

clean() {
	rm -rf $BUILD
	rm -rf $RPMS
	exit
}

while getopts ":hcsf:k:" args; do
	case "$args" in
	f)
		SPEC=$OPTARG
		;;
	s)
		SIGN=1
		;;
	k)
		KEY=$OPTARG
		;;
	c)
		clean
		;;
	h)
		usage
		;;
	esac
done
shift $((OPTIND-1))

if [ ! "$*" = "" ]; then
	OPTS="$*"
fi

# Check if the specfile exists
if [ "$(ls -f $SPEC | wc -l)" = "0" ]; then
	echo "ERROR: No specfile found. Specify it with the -s option."
	exit -2
fi

# Check if there are too many specfiles
if [ ! "$(ls -f $SPEC | wc -l)" = "1" ]; then
	echo "ERROR: Ambiguous matches for specfile. Please specify a single" \
		"file through the -s option."
	exit -7
fi

# Get the directory of the specfile
SPEC=$(ls -f $SPEC)
DIR=$(readlink -f $(dirname $SPEC))

if [ ! -d "$DIR/$BUILD" ]; then
	mkdir "$DIR/$BUILD"
fi

FILES=$(find $DIR -maxdepth 1);
for file in $FILES; do
	[ "$file" = "$DIR" ] && continue
	[ "$file" = "$DIR/$BUILD" ] && continue
	[ "$file" = "$DIR/$RPMS" ] && continue

	cp -r "$file" "$DIR/$BUILD"
done

spectool                                   \
	--define "_sourcedir $DIR/$BUILD"  \
	--define "_builddir $DIR/$BUILD"   \
	--define "_srcrpmdir $DIR/$RPMS"   \
	--define "_rpmdir $DIR/$RPMS"      \
	--define "_specdir $DIR"           \
	--get-files --all                  \
	--directory $DIR/$BUILD $SPEC

echo

rpmbuild                                   \
	--define "_sourcedir $DIR/$BUILD"  \
	--define "_builddir $DIR/$BUILD"   \
	--define "_srcrpmdir $DIR/$RPMS"   \
	--define "_rpmdir $DIR/$RPMS"      \
	--define "_specdir $DIR"           \
	$OPTS $SPEC

if [ ! "$SIGN" = "1" ]; then
	exit
fi

for file in $(find out/ -name '*.rpm'); do
	echo "Signing $file"
	if [ "$KEY" = "" ]; then
		rpm --resign $file 2>&1 > /dev/null
	else
		rpm --resign $file --define "_gpg_name $KEY" 2>&1 > /dev/null
	fi
done