Re: [Question] Signature calculation ignoring parts of binary files

> I feel really bad asking this, and I should know the answer, and yet.
> 
> I have a binary file that needs to go into a repo intact (unchanged). I also
> have a program that interprets the contents, like a textconv, that can
> output the relevant portions of the file in whatever format I like - used
> for diff typically, dumps in 1K chunks by file section. What I'm looking for
> is to have the SHA1 signature calculated with just the relevant portions of
> the file so that two actually different files will be considered the same by
> git during a commit or status. In real terms, I'm trying to ignore the
> Creator metadata of a JPG because it is mutable and irrelevant to my repo
> contents.
> 
> I'm sorry to ask, but I thought this was in .gitattributes but I can't
> confirm the SHA1 behaviour.