Addding --word-diff as a config option and diff selection option

[benomahony]

PR Description

Maybe I'm being dumb but I couldn't get word diff working with any of the existing options but this works!

Unfortunately the chunk selection seems a lot more complex.

Go is not my daily driver so any pointers would be appreciated 🙇

Please check if the PR fulfills these requirements

• Cheatsheets are up-to-date (run go generate ./...)
• Code has been formatted (see here)
• Tests have been added/updated (see here for the integration test guide)
• Text is internationalised (see here)
• If a new UserConfig entry was added, make sure it can be hot-reloaded (see here)
• Docs have been updated if necessary
• You've read through your own file changes for silly mistakes etc

[stefanhaller]

Thanks; while I can understand where the need comes from, I'm not a fan of this. Maybe that's because I think there are better solutions than git's --word-diff (see here), but also because it doesn't play well with pagers, and I think using lazygit without a pager is a waste.

So we'd probably have to disable the pager when the word-diff option is on, but this would be such a shame, especially since most pagers are already better at displaying intra-line changes than git's word-diff option is (see above).

So I have to say I would be rather against adding this.

I'm currently working on supporting multiple pagers that you can cycle through; this will allow you to add a script that calls git diff --word-diff, and use that as an external diff command.

[stefanhaller]

The PR for multiple pagers is here, if you want to give it a try: #4953.

To switch between the regular diff without a pager and a word-diff, you'd save the following script as word-diff.sh somewhere:

#!/bin/sh

git diff --word-diff --no-index --color=always --no-ext-diff "$2" "$5"

and then use the following lazygit config:

git:
  pagers:
    - pager: ""
    - externalDiffCommand: /path/to/word-diff.sh