# exporting it.
unset CDPATH
-: ${GIT_DIR=.git}
-: ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
-
die() {
echo >&2 "$@"
exit 1
}
-# Make sure we are in a valid repository of a vintage we understand.
-GIT_DIR="$GIT_DIR" git-var GIT_AUTHOR_IDENT >/dev/null || exit
+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 "$1" in
+ --h|--he|--hel|--help)
+ echo "$LONG_USAGE"
+ exit
+esac
+
+if [ -z "$SUBDIRECTORY_OK" ]
+then
+ : ${GIT_DIR=.git}
+ : ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
+
+ # Make sure we are in a valid repository of a vintage we understand.
+ GIT_DIR="$GIT_DIR" git-var GIT_AUTHOR_IDENT >/dev/null || exit
+else
+ GIT_DIR=$(git-rev-parse --git-dir) || exit
+fi