[PATCH 1 of 1 RFC] tag: abort if not at a branch head

[Matt Mackall]

On Tue, 2010-12-07 at 01:31 +0100, Adrian Buehlmann wrote:
> On 2010-12-07 01:14, Matt Mackall wrote:
> > On Mon, 2010-12-06 at 13:56 -0600, Kevin Bullock wrote:
> >> # HG changeset patch
> >> # User Kevin Bullock <kbullock at ringworld.org>
> >> # Date 1291665075 21600
> >> # Node ID f52e752c6d5f90352bb29ba6c2543656f6e4531e
> >> # Parent  8c6b7a5f38c4585b1b2c2ceaffa8023f36a18479
> >> tag: abort if not at a branch head
> >>
> >> Since it's usually only desirable to make tag commits on top of branch
> >> heads, abort if the working dir parent is not a branch head. -f/--force
> >> may be passed to commit at a non-head anyway.
> > 
> > I'm hard-pressed to think of any realistic use cases for committing a
> > tag at somewhere other than a branch head. Can anyone think of one?
> > 
> 
> Someone might be used to doing weird things.
> 
> Assume you want to start a new feature based on an old revision
> (slightly weird, but not completely mad).
> 
>   $ hg up <old rev>
> 
> Then assume that user wants to mark with a tag from where he started to
> fork off ("I always forget from where I started my fork work, so I began
> to tag it with a name"):
> 
>   $ hg tag feature-X-base
>   hack, ci, hack, ci, etc
> 
> Certainly not a very elegant usage of Mercurial but Mercurial allowed
> that in the past.

Ok, that's half an answer. The other half is: do you think requiring -f
in this case will be an issue?

-- 
Mathematics is the supreme nostalgia of our time.