[pacman-dev] [RFC v3 07/13] pacdiff: streamline usage function

[Gordian Edenhofer]

Signed-off-by: Gordian Edenhofer <gordian.edenhofer at gmail.com>
---
 contrib/pacdiff.sh.in | 67 ++++++++++++++++++++++++++++++++-------------------
 1 file changed, 42 insertions(+), 25 deletions(-)

diff --git a/contrib/pacdiff.sh.in b/contrib/pacdiff.sh.in
index 3394993..b9b15b8 100644
--- a/contrib/pacdiff.sh.in
+++ b/contrib/pacdiff.sh.in
@@ -29,35 +29,52 @@ USE_COLOR='y'
 declare -a oldsaves
 declare -i USE_FIND=0 USE_LOCATE=0 USE_PACDB=0 OUTPUTONLY=0
 
+# gettext initialization
+export TEXTDOMAIN='pacman'
+export TEXTDOMAINDIR='@localedir@'
+
+# Determine whether we have gettext; make it a no-op if we do not
+if ! type -p gettext >/dev/null; then
+	gettext() {
+		printf "%s\n" "$@"
+	}
+fi
+
 m4_include(../scripts/library/output_format.sh)
 m4_include(../scripts/library/parseopts.sh)
 
 usage() {
-	cat <<EOF
-${myname} (pacman) v${myver}
-
-A simple program to merge or remove pacnew/pacsave files.
-
-Usage: $myname [-l | -f | -p] [--nocolor]
-
-Search Options:     select one (default: --pacmandb)
-  -l/--locate       scan using locate
-  -f/--find         scan using find
-  -p/--pacmandb     scan active config files from pacman database
-
-General Options:
-  -o/--output       print files instead of merging them
-  -m/--nocolor      remove colors from output
-
-Environment Variables:
-  DIFFPROG          override the merge program: (default: 'vim -d')
-  DIFFSEARCHPATH    override the search path. (only when using find)
-                    (default: /etc)
-
-Example: DIFFPROG=meld DIFFSEARCHPATH="/boot /etc /usr" $myname
-Example: $myname --output --locate
-
-EOF
+	printf "%s (pacman) %s\n" "$myname" "$myver"
+	echo
+	printf -- "$(gettext "A simple program to merge or remove pacnew/pacsave files")\n"
+	echo
+	printf -- "$(gettext "Usage: %s <operation> [options]")\n" "$0"
+	echo
+	printf -- "$(gettext "Search Options:")\n"
+	printf -- "  -l, --locate      "
+	printf -- "$(gettext "Scan using locate")\n"
+	printf -- "  -f, --find        "
+	printf -- "$(gettext "Scan using find")\n"
+	printf -- "  -p, --pacmandb    "
+	printf -- "$(gettext "Scan active config files from pacman database")\n"
+	echo
+	printf -- "$(gettext "Options:")\n"
+	printf -- "  -o, --output      "
+	printf -- "$(gettext "Print files instead of merging them")\n"
+	printf -- "  -m, --nocolor     "
+	printf -- "$(gettext "Remove colors from output")\n"
+	echo
+	printf -- "$(gettext "Environment Variables:")\n"
+	printf -- "  DIFFPROG          "
+	printf -- "$(gettext "Override the merge program: (default: '%s')")\n" "vim -d"
+	printf -- "  DIFFSEARCHPATH    "
+	printf -- "$(gettext "Override the search path. (only when using find)\n\
+	                    (default: %s)")\n" "/etc"
+	echo
+	printf -- "$(gettext "Examples:")"
+	printf -- "    DIFFPROG=meld DIFFSEARCHPATH=\"/boot /etc /usr\" %s\n" "$myname"
+	printf -- "    %s --output --locate\n" "$myname"
+	echo
 }
 
 version() {
-- 
2.10.0