#!/bin/sh
#
-# Set up GIT_DIR and GIT_OBJECT_DIRECTORY
-# and return true if everything looks ok
-#
-: ${GIT_DIR=.git}
-: ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
+# This is included in commands that either have to be run from the toplevel
+# of the repository, or with GIT_DIR environment variable properly.
+# If the GIT_DIR does not look like the right correct git-repository,
+# it dies.
+
+# Having this variable in your environment would break scripts because
+# you would cause "cd" to be be taken to unexpected places. If you
+# like CDPATH, define it for your interactive shell sessions without
+# exporting it.
+unset CDPATH
die() {
- echo "$@" >&2
+ echo >&2 "$@"
exit 1
}
-check_clean_tree() {
- dirty1_=`git-update-index -q --refresh` && {
- dirty2_=`git-diff-index --name-only --cached HEAD`
- case "$dirty2_" in '') : ;; *) (exit 1) ;; esac
- } || {
- echo >&2 "$dirty1_"
- echo "$dirty2_" | sed >&2 -e 's/^/modified: /'
- (exit 1)
- }
+usage() {
+ die "Usage: $0 $USAGE"
}
-[ -h "$GIT_DIR/HEAD" ] &&
-[ -d "$GIT_DIR/refs" ] &&
-[ -d "$GIT_OBJECT_DIRECTORY/00" ]
+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
+
+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 repo-config --get core.nosuch >/dev/null
+ if test $? = 128
+ then
+ exit
+ fi
+else
+ GIT_DIR=$(git-rev-parse --git-dir) || exit
+fi