Hi Peff, On Fri, 25 Nov 2016, Jeff King wrote: > On Fri, Nov 25, 2016 at 12:05:00PM +0100, Johannes Schindelin wrote: > > > > I would have expected it to just be a build-time flag, like: > > > > > > make BUILTIN_DIFFTOOL=Yes test > > > > That works for Git developers. > > > > I want to let as many users as possible test the builtin difftool. > > Hopefully a lot more users than there are Git developers. > > > > Which means that I need a feature flag in production code, not a build > > time flag. > > Ah, I didn't realize that was a requirement. If this is going to be part > of a release and real end-users are going to see it, that does make me > think the config option is the better path (than the presence of some > file), as it's our standard way of tweaking run-time behavior. So how do you easily switch back and forth between testing the old vs the new difftool via the test suite? Ciao, Dscho