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

Am Freitag, 11. Januar 2013, 23:10:36 schrieb Junio C Hamano:

Jardel Weyrich [off-list ref] writes:

quoted

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:

quoted

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