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Joey Hess 2017-02-14 17:39:37 -04:00
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A git post-update hook can run git-annex merge and so make all pushes
into a repository update its working tree.
But, there are some complications to writing that hook. See
<http://git-annex.branchable.com/tips/setup_a_public_repository_on_a_web_site/>
IIRC different versions of git may behave differently.
And, such a hook can't be used on a filesystem that doesn't support
executables. (Except on Windows which has a workaround to allow
non-executable hooks.)
Could there be a single command that sets it up? Something like
`git annex merge --run-automatically`
That could install the hook, and also set an annex.automerge config.
The config could be checked by git-annex sync (and assistant) when pushing
to a local remote, and they could perform a merge on the remote. This way,
it would work for repos on removable drives that don't support execute
bits. (Ssh remotes on such filesystems would not be handled, but that's a
rare configuration; the hook would handle ssh remotes on non-crippled
filesystems, and on Windows.)
---
Alternatively, receive.denyCurrentBranch can be set to updateInstead.
With this configuration, `git annex sync` automatically updates the
work-tree of the remote already.
However, any differences in the remote's work tree or index (other than new
unstaged files) prevent the work tree update. Currently, `git annex sync`
does the master:master push quietly, because in standard non-bare repos
that's expected to fail. So, failures to update the remote work tree
won't be noticed. (`git annex sync` could look at the remote's
receive.denyCurrentBranch setting, but this would be hard to do for ssh
remotes).
Also, this wouldn't work for direct mode repositories, which are often used
on removable drives.
---
Potential least surprise violation:
If a repository is updating when git annex pushes changes to it,
the user might also expect that the same git annex sync
would pull changes from that repository. Even though nothing has been
run on the repository to commit changes made there.
Particularly when the assistant is being used, this seems an easy confusion
to have. In one clone the user sees every file change getting committed
and synced around, so why would that not happen in the other clone, on the
removable drive?
Keeping this a command-line setup, and not something the assistant does,
will avoid that confusion.
--[[Joey]]