xbps-src: add -h flag to show usage.

--HG--
extra : convert_revision : 51fbff55d296a3f818e736835a10763aff278f2d

xbps-src/xbps-src.sh.in

@@ -38,7 +38,7 @@ trap "echo && exit 1" INT QUIT
 usage()
 {
 	cat << _EOF
-$progname: [-C] [-c <config_file>] [-m <masterdir>] [-p <pkgdir>] <target>
+$progname: [-Ch] [-c <config_file>] [-m <masterdir>] [-p <pkgdir>] <target>
 
 Targets:
  build            Build a package (fetch + extract + configure + build).
@@ -67,13 +67,13 @@ Options:
  -C     Do not remove build directory after successful installation.
  -c     Path to global configuration file:
         if not specified @@XBPS_INSTALL_ETCDIR@@/xbps-src.conf is used.
+ -h	Usage output.
  -m     Master directory, overwritting the value set in the configuration
         file at @@XBPS_INSTALL_ETCDIR@@/xbps-src.conf.
  -p     Package directory, overwritting default path at
         <XBPS_MASTERDIR>/pkg-binpkgs.
 
 _EOF
-	exit 1
 }
 
 basename_cwd()
@@ -135,10 +135,11 @@ check_config_vars()
 #
 # main()
 #
-while getopts "Cc:m:p:" opt; do
+while getopts "Cc:hm:p:" opt; do
 	case $opt in
 		C) export dontrm_builddir=yes;;
 		c) config_file_specified=yes; XBPS_CONFIG_FILE="$OPTARG";;
+		h) usage && exit 0;;
 		m)
 			_MASTERDIR="$OPTARG"
 			if [ ! -d ${_MASTERDIR} ]; then
@@ -157,12 +158,12 @@ while getopts "Cc:m:p:" opt; do
 done
 shift $(($OPTIND - 1))
 
-[ $# -eq 0 -o $# -gt 2 ] && usage
+[ $# -eq 0 -o $# -gt 2 ] && usage && exit 1
 
 target="$1"
 if [ -z "$target" ]; then
 	echo "=> ERROR: missing target."
-	usage
+	usage && exit 1
 fi
 
 #
@@ -312,7 +313,7 @@ unstow)
 	;;
 *)
 	echo "=> ERROR: invalid target: $target."
-	usage
+	usage && exit 1
 esac
 
 # Agur