From: Colin Watson <cjwatson@chiark.greenend.org.uk>
Date: Fri, 27 Mar 2009 15:51:39 +0000 (+0000)
Subject: getopt option parsing; usage message
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~cjwatson/git?p=bin.git;a=commitdiff_plain;h=cbca6d095e8b83058c4151ff16b3dc3552fe5b56

getopt option parsing; usage message
---

diff --git a/rosetta-merge b/rosetta-merge
index b34676c..a1b5019 100755
--- a/rosetta-merge
+++ b/rosetta-merge
@@ -1,22 +1,44 @@
 #! /bin/bash
 
-APPLY=false
-if [ "$1" = --apply ]; then
-	APPLY=:
-	shift
-fi
+usage () {
+	[ "$1" = 0 ] || exec >&2
+	echo "Usage: $0 [--apply] [--keep-old] [--prefix PREFIX] SOURCE LANG"
+	exit "$1"
+}
 
-KEEP_OLD=false
-if [ "$1" = --keep-old ]; then
-	KEEP_OLD=:
-	shift
-fi
+die_getopt () {
+	echo "getopt failed" >&2
+	exit 1
+}
 
+APPLY=false
+KEEP_OLD=false
 PREFIX=
-if [ "$1" = --prefix ]; then
-	PREFIX="$2-"
-	shift 2
-fi
+eval set -- "$(getopt -o '' -l apply,keep-old,prefix:,help -- "$@")" || die_getopt
+while :; do
+	case $1 in
+		--apply)
+			APPLY=:
+			shift
+			;;
+		--keep-old)
+			KEEP_OLD=:
+			shift
+			;;
+		--prefix)
+			PREFIX="${2%-}-"
+			shift 2
+			;;
+		--help)
+			usage 0
+			shift
+			;;
+		--)	shift; break ;;
+		*)	die_getopt ;;
+	esac
+done
+
+[ "$1" ] || usage 1
 
 SOURCE="$1"
 shift
diff --git a/rosetta-merge-all b/rosetta-merge-all
index a0d0a8a..6740bbc 100755
--- a/rosetta-merge-all
+++ b/rosetta-merge-all
@@ -1,5 +1,47 @@
 #! /bin/sh
-if [ "$1" = --apply ]; then
+
+APPLY=false
+
+usage () {
+	[ "$1" = 0 ] || exec >&2
+	echo "Usage: $0 [--apply] [--keep-old] [--prefix PREFIX] SOURCE"
+	exit "$1"
+}
+
+die_getopt () {
+	echo "getopt failed" >&2
+	exit 1
+}
+
+parse_opts () {
+	eval set -- "$(getopt -o '' -l apply,keep-old,prefix:,help -- "$@")"
+	while :; do
+		case $1 in
+			--apply)
+				APPLY=:
+				shift
+				;;
+			--keep-old)
+				shift
+				;;
+			--prefix)
+				shift 2
+				;;
+			--help)
+				usage 0
+				shift
+				;;
+			--)	shift; break ;;
+			*)	die_getopt ;;
+		esac
+	done
+}
+
+[ "$1" ] || usage 1
+
+parse_opts "$@"
+
+if $APPLY; then
 	for x in *.po; do rosetta-merge "$@" ${x%.*}; done
 else
 	for x in *.po; do rosetta-merge "$@" ${x%.*} | view -; done