Tux has asked for the wisdom of the Perl Monks concerning the following question:

In TPC in Glasgow I released App::ccdiff, which - in short - will more clearly shows horizontal diff as well as vertical diff.

That might look like (with all verbosity on) like this screenshot

$ ccdiff -u0m --ascii termc* 5,5c5,5 - + + ^ 40,41c40,41 - :Va=\E[0m:Vc=\E[0;33m:Ve=\E[0;4m:Vg=\E[0;4;36m:\ - ^ - :Vi=\E[0;37;41m:Vk=\E[0;1;33;41m:Vo=\E[0;1;36;41;4m:cQ=\E?25I: - ^ ^ ^ ^ + :Va=\E[0m:Vc=\E[0;36m:Ve=\E[0;4m:Vg=\E[0;4;36m:\ + ^ + :Vi=\E[0;37;44m:Vk=\E[0;1;37;44m:Vo=\E[0;1;36;44;4m:cQ=\E?25I: + ^ ^ ^ ^

This works fine for the purpose it is written for: find tiny changes with more ease.

It however makes no sense if chunk shows a change of 4 lines to 24 lines with a completely different content, in which case you just want to see the chunk as lines-deleted + lines-added, with no markers to the changed characters in there, as that would mean that almost every character will be marked.

As I currently see it, there are multiple approaches to the fallback of the current behavior to a normal diff report:

It is possible to implement both and allow both at the same time.

  1. Did I state the problem well enough?
  2. Do these options make sense?
  3. Do the defaults make sense?
  4. Do you envision other options (that you would use)?

Before I start coding/changing, I'd like opinions on how you would use it and/or expect it to use, in order to raise DWIM behavior

Enjoy, Have FUN! H.Merijn