Using BBEdit as the 'Diff Tool' in Git Tower I can't turn on ignore-whitespace settings

[Phillip Apley]

Is there any way to change the default settings for BBEDit so that when it launches in as the "Diff Tool" or "Merge Tool" (compare-file mode) from Git Tower or other apps, it will ignore 

leading and trailing whitespace? When comparing from the 'Search' -> 'Find Differences' menu there are checkboxes for these settings.

Once the diff is launched I don't see any way to change them and recalculate the diffs.

This could be managed with a preference, or global environment variable before the app launches, or ideally an option click on the 'recalculate' button, or a checkbox that can be clicked after the app is launched.

If there's a way to do this from the BBEdit command line tools API, it might be possible for me to intercept what Tower is doing to launch it, but I imagine that will be difficult and not survive upgrades.

This is an essential feature. Please let me know if there's a way to do it or if it can be added.

It would also be very valuable to have control over ignoring line ending differences (Unix/Mac; CR, LF, CRLF) in this context as well.

An alternative I've found is to use Kaleidoscope, which has a check box for this, but doesn't let you edit the files directly, so I'd have to go back and forth between BBEdit and Kaleidoscope, and it wouldn't work well.

[Fletcher Sandbeck]

It looks like Git Tower launches the diff tool through the command line and there are command line switches for these preferences.  What you'd do is create a shell script wrapper which takes the parameters that git sends to the diff tool and pass them to the bbdiff tool with the appropriate command line switches set.

http://git-scm.com/book/en/v2/Customizing-Git-Git-Configuration

Usage: bbdiff [options] FILE1 FILE2

               --case-sensitive

               --flatten-folders

               --help

               --ignore-curly-quotes

               --ignore-spaces

               --ignore-extra-spaces

               --ignore-leading-spaces

               --ignore-trailing-spaces

               --resume

               --reverse

               --short-version

               --show-identical-files

               --skip-shielded-folders

               --text-files-only

               --version

               --wait

[fletcher]

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