X-Git-Url: https://git.octo.it/?p=git.git;a=blobdiff_plain;f=git-sh-setup.sh;h=d15747f1ed8f875a3c1bb7129e50bfbc8d2b033f;hp=a0172686a90c58a454656f9e6d49d6c694aec2fc;hb=HEAD;hpb=8098a178b26dc7a158d129a092a5b78da6d12b72

diff --git a/git-sh-setup.sh b/git-sh-setup.sh
index a0172686..d15747f1 100755
--- a/git-sh-setup.sh
+++ b/git-sh-setup.sh
@@ -1,10 +1,9 @@
 #!/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
@@ -17,9 +16,36 @@ die() {
 	exit 1
 }
 
-case "$(GIT_DIR="$GIT_DIR" git-symbolic-ref HEAD 2>/dev/null)" in
-refs/*)	: ;;
-*)	false ;;
-esac &&
-[ -d "$GIT_DIR/refs" ] &&
-[ -d "$GIT_OBJECT_DIRECTORY/00" ]
+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
+
+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