abump: add usage and support for recursive abuild

abump.in

 #!/bin/sh
 
+program=${0##*/}
+
 die() {
 	echo "$@" >&2
 	exit 1
@@ -15,7 +17,7 @@ do_bump() {
 
 	set -e
 
-	cd $APORTS/*/$pkgname
+	cd $APORTS/*/$pkgname || return 1
 	section=${PWD%/*}
 	section=${section##*/}
 
@@ -28,13 +30,32 @@ do_bump() {
 		-e "s/^pkgrel=.*/pkgrel=0/" \
 		APKBUILD
 
-	abuild -r checksum all || exit 1
+	abuild $abuild_opts checksum all || exit 1
 
 	git add APKBUILD
 	git commit -m"$msg"
 }
 
+usage() {
+	echo "$program - utility to bump pkgver in APKBUILDs"
+	echo "usage: $program [-hR]"
+	echo ""
+	echo "  -h  show this help"
+	echo "  -R  run abuild with -R for recursive building"
+	exit 0
+}
+
+abuild_opts="-r"
+while getopts "hR" opt; do
+	case $opt in
+	h) usage;;
+	R) abuild_opts="-R";;
+	esac
+done
+shift $(( $OPTIND - 1))
+
 while [ $# -gt 0 ]; do
 	( do_bump "$1" ) || exit 1
 	shift
 done
+