Several of our shell scripts hard-code the object ID of the empty tree.
To avoid any problems when changing hashes, compute this value on
startup of the script. For performance, store the value in a variable
and reuse it throughout the life of the script.
Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
# The following functions will also be available in the commit filter:
functions=$(cat << \EOF
+EMPTY_TREE=$(git hash-object -t tree /dev/null)
+
warn () {
echo "$*" >&2
}
{
if test $# = 3 && test "$1" = $(git rev-parse "$3^{tree}"); then
map "$3"
- elif test $# = 1 && test "$1" = 4b825dc642cb6eb9a060e54bf8d69288fbee4904; then
+ elif test $# = 1 && test "$1" = $EMPTY_TREE; then
:
else
git commit-tree "$@"
# and leaves CR at the end instead.
cr=$(printf "\015")
+empty_tree=$(git hash-object -t tree /dev/null)
+
strategy_args=${strategy:+--strategy=$strategy}
test -n "$strategy_opts" &&
eval '
die "$(eval_gettext "\$sha1: not a commit that can be picked")"
}
ptree=$(git rev-parse -q --verify "$1"^^{tree} 2>/dev/null) ||
- ptree=4b825dc642cb6eb9a060e54bf8d69288fbee4904
+ ptree=$empty_tree
test "$tree" = "$ptree"
}
against=HEAD
else
# Initial commit: diff against an empty tree object
- against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
+ against=$(git hash-object -t tree /dev/null)
fi
# If you want to allow non-ASCII filenames set this variable to true.