Is there a --stat or --numstat like option that'll allow me to have my cake and eat it too?

I maintain a hook for Git that allows you to block binary pushes[1], from other implementations I've seen it's the least stupid thing out there that does that.

Basically on-push it parses this:

    git log --pretty=format:%H -M100% --stat=9000,9001 <old_ref>..<new_ref>

The --stat=9000,9001 is there to make sure we still get the filename if it's long[2].

It's important that this is something like "git-log" instead of "git-show for each" for performance (think a push with hundreds of commits). It's also important that it's not "git diff" (think a push that adds/removes a huge binary file within one push). I also don't want to manually parse "git log --numstat -p" or whatever for performance reasons since every push hangs on this.

It's somewhat of a pain to parse that --stat output, because I have to look for /\|\s+Bin / in the output to detect binary changes.

You might be thinking "why don't you use --numstat?". Because while that option does most of what I want it doesn't show the old/new size of the binary file, so I can't have a policy to allow e.g. <=1KB files without doing a second pass with --stat or "git show".

Both formats also have various parsing edge cases, e.g. with -M100% I have to parse out renames like "foo.png => bar.png", but you can also create a file with " => " in the filename and there's no way to disambiguate it.

Both formats also only show lines added/deleted, but --numstat doesn't show the size before/after for binary files, so if I want to also prohibit huge non-binary files I can't without running both --stat and --numstat.

What I really want is something for git-log more like git-for-each-ref, so I could emit the following info for each file being modified delimited by some binary marker:

    - file name before
    - file name after
    - is rename?
    - is binary?
    - size in bytes before
    - size it bytes after
    - removed lines
    - added lines

I think no combination of git-log options or any built-in machinery comes close to giving me all of that without having to do multiple passes with some combination of git-log and git-show, but I'd love to be proven wrong.

1. https://github.com/avar/pre-receive-reject-binaries
2. OVER NINE THOUSAND should be enough for everyone, right?