将数据推送到裸git仓库时，如何自动将数据推送到git-repo？

Question

How can I automatically push the data to a git-repo when it's pushed to a bare git repo?

gitrepo - the name of my bare repo, I push to this repo from my desktop
sandbox - the name of a git repo, should automatically contain up-to-date data

After each push to gitrepo, the sandbox repository should automatically contain up-to-date data.

I considered not using a bare repository and directly push to the sandbox, it's impossible to push to a non-bare git repository. So the solution people recommended was a post-receive hook that will make the data available under /etc/puppet/environments/sandbox/.

[root@puppet environments]# cat gitrepo/hooks/post-receive
#!/bin/sh
cd /etc/puppet/environments/sandbox/
git pull origin
[root@puppet environments]#

Unfortunately this hook doesn't do anything either. I have looked at the example ( http://utsl.gen.nz/git/post-update ) offered at http://bare-vs-nonbare.gitrecipes.de/ , but I can hardly believe such a simple thing as automatically pushing the repo-commits to another repo should need 86 lines of code.

Answer 1

When you're in some (or maybe even all) of the various git hooks, definitely including post-receive , the environment variable GIT_DIR is set to . (!), which means that if you use cd /etc/puppet/environments/sandbox and run any further git command it will look for the repo in /etc/puppet/environments/sandbox , even though if that's a non-bare repo its git-managed contents are actually in /etc/puppet/environments/sandbox/.git .

Your simple test-hook will likely start working for you (making it work for others is harder) if you simply add:

unset GIT_DIR

before using git commands.

(Note that blindly doing a git pull is effective but overkill if the most recent push was, eg, to a side-project branch, or was done to add a tag, or any other operation that leaves the sandbox's branch untouched.)