Git mirror without forced pushes

Question

Is it possible somehow to set up a git repository that works as a usual --mirror for pulling into it, but without forcing when pushing from it to another repo?

http://superuser.com/questions/276079/disable-specific-git-commands-in-a-particular-repository - Might work for you? — sjakubowski, Aug 16 '13 at 01:35
What is --mirror pushing that you want to push? If you are looking for tags and remotes you should be able to push those with a refspec. — andygavin, Aug 16 '13 at 17:57

score 4 · Answer 1 · answered Aug 22 '13 at 20:13

4

You can just add --no-force to disable the forcing behavior like so:

git push --mirror --no-force

This will disable non-fast-forward updates (tested with git 1.8.0.2).

answered Aug 22 '13 at 20:13

Matthijs P

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Not seeing this behavior in `1.8.4` nor is `--no-force` documented in the man page for `git-push`. Additionally, there are no mentions of the removal of a `--no-force` option in the release notes between `1.8.0.2` and `1.8.4`. – bloudermilk Sep 04 '13 at 23:49
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Interestingly, the --no-force option has no effect if the remote has the "mirror" option set to true in the local config. Once I removed the "mirror" option from the config and set `--mirror` from the command line as shown above, everything worked as advertised. My git version is `1.8.4`. – bloudermilk Sep 04 '13 at 23:56

score 3 · Answer 2 · answered Aug 16 '13 at 15:10

I'd like to do a git push --mirror that will fail if a non-fast forward update is required.

A git push --mirror should fail if the upstream repo has its config set to receive.denyNonFastForwards true:

git config man page:

receive.denyNonFastForwards

If set to true, git-receive-pack will deny a ref update which is not a fast-forward.
Use this to prevent such an update via a push, even if that push is forced.
This configuration variable is set when initializing a shared repository.

That means you wouldn"t have to "reproduce what --mirror" does: you could simply use it, and still have that push fail if any non-fastforward merge is involved.

That's a good idea; unfortunately, I want to push to github in that way, which doesn't support this. — miracle2k, Aug 20 '13 at 11:37
@miracle2k it can, if you ask GitHub support to protect your repo that way. — VonC, Aug 20 '13 at 11:39

score 1 · Answer 3 · answered Aug 16 '13 at 23:38

Is there maybe a way to reproduce what --mirror does with other options?

Some of what mirror does can be performed using a number of pushes:

git push <remote> --all  # push all branches
git push <remote> --tags # push all tags
git push <remote> refs/remotes/* #push the remote refs

Git mirror without forced pushes

3 Answers3