Re: [BUG] Possible bug in `remote set-url --add --push`

[Sascha Cunz <sascha-ml@babbelbox.org>]

Am Freitag, 11. Januar 2013, 23:10:36 schrieb Junio C Hamano:
> Jardel Weyrich <jweyrich@gmail.com> writes:
> > I believe `remote set-url --add --push` has a bug. Performed tests
> > with v1.8.0.1 and v1.8.1 (Mac OS X).
> > 
> > Quoting the relevant part of the documentation:
> >> set-url
> >> 
> >>     Changes URL remote points to. Sets first URL remote points to
> >>     matching regex <oldurl> (first URL if no <oldurl> is given) to
> >>     <newurl>. If <oldurl> doesn’t match any URL, error occurs and
> >>     nothing is changed.
> >>     
> >>     With --push, push URLs are manipulated instead of fetch URLs.
> >>     With --add, instead of changing some URL, new URL is added.
> >>     With --delete, instead of changing some URL, all URLs matching regex
> >>     <url> are deleted. Trying to delete all non-push URLs is an error.> 
> > Here are some steps to reproduce:
> > 
> > 1. Show the remote URLs
> > 
> > jweyrich@pharao:test_clone1 [* master]$ git remote -v
> > origin  /Volumes/sandbox/test (fetch)
> > origin  /Volumes/sandbox/test (push)
> > 
> > 2. Add a new push URL for origin
> > 
> > jweyrich@pharao:test_clone1 [* master]$ git remote set-url --add --push
> > origin \> 
> >     /Volumes/sandbox/test_clone2
> > 
> > 3. Check what happened
> > 
> > jweyrich@pharao:test_clone1 [* master]$ git remote -v
> > origin  /Volumes/sandbox/test (fetch)
> > origin  /Volumes/sandbox/test_clone2 (push)
> 
> The original pushurl was replaced with the additional one, instead
> of being left and the new one getting added.  That looks certainly
> wrong.
> 
> However, the result of applying the attached patch (either to
> v1.7.12 or v1.8.1) still passes the test and I do not think it is
> doing anything differently from what you described above.
> 
> What do you get from
> 
> 	git config -l | grep '^remote\.origin'
> 
> in steps 1. and 3. in your procedure?  This question is trying to
> tell if your bug is in "git remote -v" or in "git remote set-url".

I'm not sure, if there is a bug at all. According to man git-push:

	The <pushurl> is used for pushes only. It is optional and defaults to
   <url>.
	(From the section REMOTES -> Named remote in configuration file)

the command:
    git remote add foo git@foo-fetch.org/some.git

will set "remote.foo.url" to "git@foo-fetch.org". Subsequently, fetch and push 
will use git@foo-fetch.org as url.
Fetch will use this url, because "remote.foo.url" explicitly sets this. push 
will use it in absence of a "remote.foo.pushurl".

Now, we're adding a push-url:
    git remote set-url --add --push foo git@foo-push.org/some.git

Relevant parts of config are now looking like:
	[remote "foo"]
        url = git@foo-fetch.org/some.git
        pushurl = git@foo-push.org/some.git

Since, pushurl is now given explicitly, git push will use that one (and only 
that one).

If we add another push-url now,
    git remote set-url --add --push foo git@foo-push-also.org/some.git

the next git-push will push to foo-push.org and foo-push-also.org.

Now, using --set-url --delete on both of these urls restores the original 
state: only "remote.foo.url" is set; meaning implicitly pushurl defaults to 
url again.

To me this is exactly what Jardel was observing:

> In step 2, Git replaced the original push URL instead of adding a new
> one. But it seems to happen only the first time I use `remote set-url
> --add --push`. Re-adding the original URL using the same command seems
> to work properly.

> And FWIW, if I delete (with "set-url --delete") both URLs push, Git
> restores the original URL.

Or am I missing something here?

Might be that the "bug" actually is that the expectation was

	git remote add foo git@foo-fetch.org/some.git

should have created a config like:

	[remote "foo"]
        url = git@foo-fetch.org/some.git
        pushurl = git@foo-fetch.org/some.git

since that is what "git remote -v" reports.

If that is the case, we might want to amend the output of 'git remote -v' with 
the information that a pushurl is not explicitly given and thus defaults to 
url.

Sascha