I like the two-step approach. And this is clearly a feature that does not need to be rushed. You want me to send a patch for step#1?
On Thu, Oct 6, 2016 at 1:19 PM, Paul Eggert <egg...@cs.ucla.edu> wrote: > On 10/06/2016 12:48 PM, Norbert Kiesel wrote: > >> But we should be able to support a GNU_DIFF_FORMAT environment >> variable that sets the default format, no? >> > > It might be a good idea to change the default output format. I expect the > first step would be to change 'diff' to warn on stderr if no output format > option is specified; you could silence the warning with the --normal > option, or by setting POSIXLY_CORRECT. This step should also document the > first step (and the intent to change the default) in the usual places. > After some time in some later release we could then change the default. > > I'd rather not have diff's behavior depend on a new environment variable. > Environment variables are a pain to get right and something like this could > break security-relevant code. > >
