Teach core object handling functions about gitlinks

diff --git a/git-sh-setup.sh b/git-sh-setup.sh
index 42f9b1c125578a7158392b53ec8792d6c6bbb273..f24c7f2d23c13e9874308a019f3c0f93225de3c0 100755 (executable)
--- a/git-sh-setup.sh
+++ b/git-sh-setup.sh
@@ -20,6 +20,39 @@ usage() {
        die "Usage: $0 $USAGE"
 }
 
+set_reflog_action() {
+       if [ -z "${GIT_REFLOG_ACTION:+set}" ]
+       then
+               GIT_REFLOG_ACTION="$*"
+               export GIT_REFLOG_ACTION
+       fi
+}
+
+is_bare_repository () {
+       git-config --bool --get core.bare ||
+       case "$GIT_DIR" in
+       .git | */.git) echo false ;;
+       *) echo true ;;
+       esac
+}
+
+cd_to_toplevel () {
+       cdup=$(git-rev-parse --show-cdup)
+       if test ! -z "$cdup"
+       then
+               cd "$cdup" || {
+                       echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree"
+                       exit 1
+               }
+       fi
+}
+
+require_work_tree () {
+       test $(is_bare_repository) = false &&
+       test $(git-rev-parse --is-inside-git-dir) = false ||
+       die "fatal: $0 cannot be used without a working tree."
+}
+
 if [ -z "$LONG_USAGE" ]
 then
        LONG_USAGE="Usage: $0 $USAGE"
@@ -39,7 +72,11 @@ esac
 if [ -z "$SUBDIRECTORY_OK" ]
 then
        : ${GIT_DIR=.git}
-       GIT_DIR=$(GIT_DIR="$GIT_DIR" git-rev-parse --git-dir) || exit
+       GIT_DIR=$(GIT_DIR="$GIT_DIR" git-rev-parse --git-dir) || {
+               exit=$?
+               echo >&2 "You need to run this command from the toplevel of the working tree."
+               exit $exit
+       }
 else
        GIT_DIR=$(git-rev-parse --git-dir) || exit
 fi