submodule: make zero-oid comparison hash function agnostic
With SHA-256, the length of the all-zeros object ID is longer. Add a
function to git-submodule.sh to check if a full hex object ID is the
all-zeros value, and use it to check the output we're parsing from git
diff-files or diff-index.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/git-submodule.sh b/git-submodule.sh
index 1b568e2..c09eb3e 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -82,6 +82,11 @@
n=$(($1 + 0)) 2>/dev/null && test "$n" = "$1"
}
+# Given a full hex object ID, is this the zero OID?
+is_zero_oid () {
+ echo "$1" | sane_egrep '^0+$' >/dev/null 2>&1
+}
+
# Sanitize the local git environment for use within a submodule. We
# can't simply use clear_local_git_env since we want to preserve some
# of the settings from GIT_CONFIG_PARAMETERS.
@@ -780,7 +785,7 @@
while read -r mod_src mod_dst sha1_src sha1_dst status name
do
if test -z "$cached" &&
- test $sha1_dst = 0000000000000000000000000000000000000000
+ is_zero_oid $sha1_dst
then
case "$mod_dst" in
160000)
