#!/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
# exporting it.
unset CDPATH
+: ${GIT_DIR=.git}
+: ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}
+
die() {
echo >&2 "$@"
exit 1
}
-case "$(GIT_DIR="$GIT_DIR" git-symbolic-ref HEAD 2>/dev/null)" in
-refs/*) : ;;
-*) false ;;
-esac &&
-[ -d "$GIT_DIR/refs" ] &&
-[ -d "$GIT_OBJECT_DIRECTORY/" ]
+# Make sure we are in a valid repository of a vintage we understand.
+GIT_DIR="$GIT_DIR" git-var GIT_AUTHOR_IDENT >/dev/null || exit