Update git-sh-setup(1) to allow transparent use of git-rev-parse --parseopt

If you set OPTIONS_SPEC, git-sh-setups uses git-rev-parse --parseopt
automatically.

It also diverts usage to re-exec $0 with the -h option as parse-options.c
will catch that.

If you need git-rev-parse --parseopt to keep the `--` the user may have
passed to your command, set OPTIONS_KEEPDASHDASH to a non empty value
in your script.

Signed-off-by: Pierre Habouzit <madcoder@debian.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/git-sh-setup.sh b/git-sh-setup.sh
index 86d7d4c4e742c80e936d5f1c9f2037327eba7287..e1cf885983f60c66472ccfa3c4b9e66b60255866 100755 (executable)
--- a/git-sh-setup.sh
+++ b/git-sh-setup.sh
@@ -16,9 +16,36 @@ die() {
        exit 1
 }
 
-usage() {
-       die "Usage: $0 $USAGE"
-}
+if test -n "$OPTIONS_SPEC"; then
+       usage() {
+               exec "$0" -h
+       }
+
+       parseopt_extra=
+       [ -n "$OPTIONS_KEEPDASHDASH" ] &&
+               parseopt_extra="$parseopt_extra --keep-dashdash"
+
+       eval `echo "$OPTIONS_SPEC" | git rev-parse --parseopt $parseopt_extra -- "$@" || echo exit $?`
+else
+       usage() {
+               die "Usage: $0 $USAGE"
+       }
+
+       if [ -z "$LONG_USAGE" ]
+       then
+               LONG_USAGE="Usage: $0 $USAGE"
+       else
+               LONG_USAGE="Usage: $0 $USAGE
+
+$LONG_USAGE"
+       fi
+
+       case "$1" in
+               -h|--h|--he|--hel|--help)
+               echo "$LONG_USAGE"
+               exit
+       esac
+fi
 
 set_reflog_action() {
        if [ -z "${GIT_REFLOG_ACTION:+set}" ]
@@ -91,21 +118,6 @@ get_author_ident_from_commit () {
        LANG=C LC_ALL=C sed -ne "$pick_author_script"
 }
 
-if [ -z "$LONG_USAGE" ]
-then
-       LONG_USAGE="Usage: $0 $USAGE"
-else
-       LONG_USAGE="Usage: $0 $USAGE
-
-$LONG_USAGE"
-fi
-
-case "$1" in
-       -h|--h|--he|--hel|--help)
-       echo "$LONG_USAGE"
-       exit
-esac
-
 # Make sure we are in a valid repository of a vintage we understand.
 if [ -z "$SUBDIRECTORY_OK" ]
 then