Re: [PATCH v4 1/2] for-each-repo: new command used for multi-repo operations

[John Keeping <john@keeping.me.uk>]

On Sun, Jan 27, 2013 at 11:04:08AM -0800, Junio C Hamano wrote:
> One more thing that nobody brought up during the previous reviews is
> if we want to support subset of repositories by allowing the
> standard pathspec match mechanism.  For example,
> 
> 	git for-each-repo -d git diff --name-only -- foo/ bar/b\*z
> 
> might be a way to ask "please find repositories match the given
> pathspecs (i.e. foo/ bar/b\*z) and run the command in the ones that
> are dirty".  We would need to think about how to mark the end of the
> command though---we could borrow \; from find(1), even though find
> is not the best example of the UI design.  I.e.
> 
> 	git for-each-repo -d git diff --name-only \; [--] foo/ bar/b\*z
> 
> with or without "--".

Would it be better to make this a (multi-valued) option?

    git for-each-repo -d --filter=foo/ --filter=bar/b\*z git diff --name-only

It seems a lot simpler than trying to figure out how the command is
going to handle '--' arguments.

> Oh, that reminds me of another thing.  Perhaps we would want to
> export the (relative) path to the found repository in some way to
> allow the commands to do this kind of thing in the first place?
> "submodule foreach" does this with $path, I think.

I think $path is the only variable exported by "submodule foreach" which
is applicable here, but it doesn't work on Windows, where environment
variables are case-insensitive.

Commit 64394e3 (git-submodule.sh: Don't use $path variable in
eval_gettext string) changed "submodule foreach" to use $sm_path
internally although I notice that the documentation still uses $path.

Perhaps $repo_path in this case?


John