From 2fbf67507ffd5980489e8e693091abc96548e613 Mon Sep 17 00:00:00 2001
From: Oliver Davies <oliver@oliverdavies.dev>
Date: Tue, 9 Jul 2024 14:15:46 +0100
Subject: [PATCH] git: use `difftastic` by default

As described in
https://difftastic.wilfred.me.uk/git.html#difftastic-by-default, the
`--ext-diff` option needs to be used for difftastic to be used on
commands other than `git diff`, such as `git show` or `git log`.

> This only applies to git diff. For other git commands, you still need
to specify --ext-diff, or use an alias as described above.

```shell
$ git diff
$ git show HEAD --ext-diff
$ git log -p --ext-diff
```

> Conversely, if you need to copy/paste a diff in the standard diff
format, you can use git diff --no-ext-diff.
---
 lib/shared/modules/zsh.nix | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/shared/modules/zsh.nix b/lib/shared/modules/zsh.nix
index ff04d02..d15f4b6 100644
--- a/lib/shared/modules/zsh.nix
+++ b/lib/shared/modules/zsh.nix
@@ -20,6 +20,11 @@
           else
             (cd "''${ROOT}" && eval "''${@}")
           fi
+        elif [[ "''$1" == "log" || "''$1" == "show"  ]]; then
+          local command="$1"
+          shift 1
+
+          ${pkgs.git}/bin/git "$command" --ext-diff "$@"
         else
           ${pkgs.git}/bin/git "''${@}"
         fi