Re: [git-users] changing email in one repo

[Pablo Rodríguez]

On 08/12/2016 06:16 PM, Konstantin Khomoutov wrote:
> On Fri, 12 Aug 2016 17:50:12 +0200 wrote:
> 
>> I have a repo (also hosted at Gitlab) that uses an email address that
>> I would like to remove from the whole repo (and replace with another
>> one).
>>
>> All contributions to that repo are mine. Is there any way that I can
>> replace all email addresses in both my local repo and the remote?
> 
> Sort of.
> 
> The e-mail address is a part of the so-called "author" and "committer"
> fields in the commit objects representing all the affected commits in
> your repository.
> 
> So, to do what you need you need to actually re-write all these commits
> objects.  Here's how to do this [1].
> [...]
> 1. https://help.github.com/articles/changing-author-info/

Many thanks for your reply, Konstantin.

It was what I needed it. My repo is private and it has been never been
cloned.

BTW, is there any other way to check for errors than to search for any
original ref in refs/original/?

Many thanks for your help again,


Pablo
-- 
http://www.ousia.tk

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Re: [git-users] changing email in one repo

[Gergely Polonkai]

Hello,

yes, there is a way, it can be easily done with git filter-branch. However,
before going where no one should, let's dive in on the consequences.

A commit object consists of a bunch of things, like the commit message, the
root tree object's hash, and in your case the most important, an author
date, commit date, author name and committer name. When you change any of
these in one commit, the SHA1 hash of that commit changes. And, as a commit
also contains the SHA1 of its parent, if you change one commit, you change
all commits that descend from that one.

If you are the only committer in that repo, it is more than likely that the
author and committer is both set to your name+address, so you will change
all the commits anyway, so you don't have to worry about all the above. But
you mentioned the repo is hosted on GitLab. So what happens if someone have
already cloned your repository? They will have a root commit with different
metadata, and Git will complain about unrelated histories (or not; someone
please confirm or deny this fact).

All in all, it is possible, but you probably don't want to do this. If you
really do, see [1].

Best,
Gergely

  [1] http://stackoverflow.com/a/4494037/1305139

On Fri, Aug 12, 2016, 17:49 Pablo Rodríguez  wrote:

> Dear list,
>
> I have a repo (also hosted at Gitlab) that uses an email address that I
> would like to remove from the whole repo (and replace with another one).
>
> All contributions to that repo are mine. Is there any way that I can
> replace all email addresses in both my local repo and the remote?
>
> Many thanks for your help,
>
> Pablo
> --
> http://www.ousia.tk
>
> --
> You received this message because you are subscribed to the Google Groups
> "Git for human beings" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to git-users+unsubscr...@googlegroups.com.
> For more options, visit https://groups.google.com/d/optout.
>

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Re: [git-users] changing email in one repo

[Konstantin Khomoutov]

On Fri, 12 Aug 2016 17:50:12 +0200
Pablo Rodríguez  wrote:

> I have a repo (also hosted at Gitlab) that uses an email address that
> I would like to remove from the whole repo (and replace with another
> one).
> 
> All contributions to that repo are mine. Is there any way that I can
> replace all email addresses in both my local repo and the remote?

Sort of.

The e-mail address is a part of the so-called "author" and "committer"
fields in the commit objects representing all the affected commits in
your repository.

So, to do what you need you need to actually re-write all these commits
objects.  Here's how to do this [1].

A note of warning.
Since commits link to each other using the SHA-1 hashes calculated over
their contents, and it includes the commit object itself, these hashes
will be different for the re-created commits.  To say this in other
words, while semantically the history of your repository will remain
the same -- in the sense that each re-written commit will represent
exactly the set of changes the commit it replaced was, _literally_ all
the history will be different because all the commits will have hashes
different from the original.
This means that whoever forked your repository or merely cloned it and
based some their own work on that history, will need to re-fork,
re-clone and take actions to accomodate this change.  This situation is
well described in the section "RECOVERING FROM UPSTREAM REBASE" of the
`git rebase` manual page.  Please be sure to read and understand it
before you actually decide to do what you want.  I'd say that unless
it's your private repo and you therefore have full control over all of
its clones, it would be much better to just update the repo's README
file with the information on the change of your e-mail address.
And then just do all the new commits there using the updated e-mail
address.

1. https://help.github.com/articles/changing-author-info/

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[git-users] changing email in one repo

[Pablo Rodríguez]

Dear list,

I have a repo (also hosted at Gitlab) that uses an email address that I
would like to remove from the whole repo (and replace with another one).

All contributions to that repo are mine. Is there any way that I can
replace all email addresses in both my local repo and the remote?

Many thanks for your help,

Pablo
-- 
http://www.ousia.tk

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