Apple diff on Venture 13.0.1

[diegoholiveira]

I'm running MacOS Ventura 13.0.1, and with let g:strip_only_modified_lines=1, the plugin call Apple Diff with 3 removed options:

• unchanged-group-format
• old-group-format
• new-group-format

I found two solutions to this problem:

1. Install diffutils using Homebrew.
2. Remove those options from https://github.com/ntpeters/vim-better-whitespace/blob/master/plugin/better-whitespace.vim#L105

I tried the second one and it worked here, but I'm keep the original call and use it with the diff command from diffutils. Should we add in the docs that Apple Diff is not compatible with this plugin or there's a way to safely change the command to work with Apple Diff?

[Cimbali]

You’re probably not getting the right output from apple diff without these options. However maybe there are options to get the right output if we detect that’s the diff being used? We just want the pairs of new/changed lines in the format start,end.

If you diff 2 files with apple diff:

a
b
c

and:

a
f
c
d

What is the output you get? It should be 2,2 4,4 .

[diegoholiveira]

You're right @Cimbali . The output is not the expected one:

% /usr/bin/diff -a --changed-group-format="%dF,%dL " 1.txt 2.txt
a
%dF,%dL b
c
%dF,%dL %

So, the only true solution of the both that I provided previously is to install diffutils:

% /usr/local/bin/diff -a --unchanged-group-format="" --old-group-format="" --new-group-format="%dF,%dL " --changed-group-format="%dF,%dL " 1.txt 2.txt
2,2 4,4 %