hooks--update.sample: use hash-agnostic zero OID
commitd8d3d632f4165955da49032d50279c20cfbde2e5
authorDenton Liu <liu.denton@gmail.com>
Wed, 23 Sep 2020 09:38:45 +0000 (23 02:38 -0700)
committerJunio C Hamano <gitster@pobox.com>
Wed, 23 Sep 2020 16:31:45 +0000 (23 09:31 -0700)
treef206f463125c801a970ba2c0796a4f2e5bb461da
parent8c7e5059506c6840bfbd4dd8d1730784a5689719
hooks--update.sample: use hash-agnostic zero OID

The update sample hook has the zero OID hardcoded as 40 zeros. However,
with the introduction of SHA-256 support, this assumption no longer
holds true. Replace the hardcoded $z40 with a call to

git hash-object --stdin </dev/null | tr '[0-9a-f]' '0'

so the sample hook becomes hash-agnostic.

Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
templates/hooks--update.sample