Custom Delta

[Mads Kiilerich]

josericardo.jr wrote, On 04/25/2012 07:29 PM:
> Hello,
>
> I'm developing a custom tool that is able to calculate the diff and merge
> operation of my custom binary file. This way, for example, if I have my
> original A file and modify it generating B, I only need to apply my tool in
> order to find its difference. This way, I would like to store only my custom
> delta that represents the modification from A to B, allowing me to
> reconstruct B from A using my custom tool and this custom delta.
>
> Does anyone knows if is it possible to do using mercurial?

It is not clear how that should be used in a version control setup. You 
might be able to create a custom delta, but something would have to 
apply that delta too.

You could probably organize your custom tool in such a way that the 
binary file was generated by your build system and custom tool from a 
version controlled source file. The most naïve approach would be to 
simply store a chain of deltas in a 'source' file.

You could perhaps also use decode/encode filters (see the hgrc man 
page). That functionality is however rarely used and might have some 
rough corners.

Other relevant information can perhaps be found in 'hg help extdiff' and 
'hg help merge-tools'.

/Mads