Re: RCS: (vc-next-action 1) only New Backend

[Eli Zaretskii <eliz@gnu.org>]

> Cc: oub@mat.ucm.es, emacs-devel@gnu.org
> From: Dmitry Gutov <dgutov@yandex.ru>
> Date: Mon, 21 Sep 2015 05:29:11 +0300
> 
> On 09/21/2015 05:18 AM, Stefan Monnier wrote:
> 
> > Never heard of it used for CVS (and can't find mention of it in "cvs
> > commit --help").  As for SCCS, it can use that same
> > log-edit-extract-headers for that.
> 
> 'man cvs' has this: "-r tag is available with the commit and history 
> commands", which follows a paragraph devoted to "-r tag[:date]".

No, that's the wrong command.  We are talking about "cvs commit".
The CVS manual has this text:

  commit options
  --------------

  [...]

  `-r REVISION'
       Commit to REVISION.  REVISION must be either a branch, or a
       revision on the main trunk that is higher than any existing
       revision number (*note Assigning revisions::).  You cannot commit
       to a specific revision on a branch.

> Overall, it doesn't seem to be that far from a common Git workflow 
> element: check out a branch (maybe create it) and commit to it.
> 
> If we try hard enough, maybe we could fit both new and old backends into 
> one VC workflow. Either split the operation likewise into two, for RCS 
> and friends (that would be ideal, provided it's possible; and it'll also 
> need a new command that allows creating a new tag/revision/branch), or 
> also add the ability to "check out another branch and commit" to Git and 
> newer backends.

I think another possibility is to commit a tag with the specified
REVISION string immediately after committing the current changeset.