Git pre-receive hook newRev 问题

Question

While executing pre-receive hook git show $newrev shows diff in $newRev but if while executing pre-receive hook I will go to repo and execute the same command git show $newrev it will return error fatal: bad object {newRev} .

Git version: 2.22.0. On Git 2.7.4 executing git show in repo doesn't return error.

pre-receive hook script when git show works correctly

#!/usr/bin/env bash
read oldrev newrev refname

git show $newrev

pre-receive hook script with sleep and manually run git show in repo

#!/usr/bin/env bash
read oldrev newrev refname

sleep 999

cd /repo
git show ae435ae1f9de55620d306cc82799ff20870f4238

fatal: bad object ae435ae1f9de55620d306cc82799ff20870f4238

Answer 1

After investigating I understood that Git in pre-receive hook creates separate temp dir where it collects info about commit that came. For example temp dir name is objects/incoming-GsAsa .

But Git knew about it only in pre-receive hook script because it set GIT_OBJECT_DIRECTORY and GIT_ALTERNATE_OBJECT_DIRECTORIES envs properly.

So, the answer for the question is to set properly GIT_OBJECT_DIRECTORY and GIT_ALTERNATE_OBJECT_DIRECTORIES vars.