how to share a file between 2 repositories? Hardlinks?

[Uwe Brauer]

>>> "PD" == Pierre-Yves David <pierre-yves.david at ens-lyon.org> writes:

> Using a hardlink will work, as the hardlink works a the filesystem
> level and Mercurial will be oblivious of that "implementation"
> details.

> However, it will be up to you to preserve that hardlink in sync. Other
> program like your test editor, or generation of the file might break
> that hardlink, Even `hg update` could end up doing that.

> So it depends of what kind of file it is, how and how often it gets
> updated. And depending on that you might want to setup hooks to make
> sure the two "file" (i.e. file system path) still point to the same
> "content" (i.e. file system inode) before committing, or after update.

> Can you tell use more about this file?

Thanks for the detailed response. I’m probably something of an outlier
here, as I mainly use Mercurial for scientific collaboration involving
LaTeX—along with some Emacs Lisp and MATLAB coding.

The file in question is a BibTeX file containing entries such as:


--8<---------------cut here---------------start------------->8---
@InCollection{christodoulou90:_minkow,
  title        = {The global nonlinear stability of the {M}inkowski
                  space},
  author       = {Christodoulou, D. and Klainerman, S.},
  booktitle    = {Séminaire sur les Équations aux {D}érivées
                  {P}artielles, 1989--1990},
  publisher    = {École Polytech., Palaiseau},
  year         = 1990,
  pages        = {Exp.\ No.\ XIII, 31},
  Mrclass      = {83C05 (58G16 58G17)},
  Mrnumber     = 1073188
}
--8<---------------cut here---------------end--------------->8---


The editor I use is GNU Emacs. When I committed the file in one
repository using Emacs VC and then opened the hard-linked file in the
other repository, Emacs refused to commit, claiming there were no
changes—even though I could commit from the command line.

I assume this is an Emacs issue.

Regards

Uwe Brauer 
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