#!/bin/bash

die() {
	echo "$( basename $0 ): $@" 1>&2
	exit 1
}

OUTPUT=${OUTPUT:-/tmp}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

# if no package name, see if we're in a SlackBuild dir.
# if so, install the package for the current dir, if one
# exists in $OUTPUT. Read .info file for version number and
# extract BUILD from the SlackBuild.

if [ -z "$@" ]; then
	infofile=$( echo *.info )

	[ "$infofile" = '*.info' ] && die "no .info file in current dir"

	infofile1=$( echo *.info | cut -d' ' -f1 )
	[ "$infofile" != "$infofile1" ] && die "multiple .info files found in current dir"

	pkgname=$(basename $infofile .info)
	[ ! -e "$pkgname.SlackBuild" ] && die "$pkgname.SlackBuild not found in current dir"

	source ./$pkgname.info
	[ -z "$PRGNAM" -o -z "$VERSION" ] && die "bad/incomplete .info file, bailing"

	[ "$PRGNAM" != "$pkgname" ] && die "bad PRGNAM=$PRGNAM in $pkgname.info"

	buildline=$(grep "^ *BUILD=" $pkgname.SlackBuild)
	[ -z "$buildline" ] && die "missing BUILD= in $pkgname.SlackBuild"

	eval $buildline

	for myarch in noarch "$ARCH"; do
		myglob="$OUTPUT/$PRGNAM-$VERSION-$myarch-$BUILD*.t?z"
		myfile=$( echo $myglob )

		if [ "$myglob" = "$myfile" ]; then
			: # do naught
		elif [ "$( /bin/ls $myfile 2>/dev/null | wc -l )" -gt "1" ]; then
			die "Multiple packages match, not installing anything: $( /bin/ls $myfile )"
		else
			if [ -n "$found" ]; then
				die "Multiple packages/arches, not installing anything: $myfile $found"
			else
				found=$myfile
				echo found $found
			fi
		fi
	done

	[ -z "$found" ] && die "No $PRGNAM-$VERSION-(noarch|$ARCH)-$BUILD*.t?z package in $OUTPUT, build one!"

	set "$found"
fi

sudo upgradepkg --reinstall --install-new "$@"