From 895aa07eea96f718f57aa3157c51b0a4c3ef32d4 Mon Sep 17 00:00:00 2001
From: Brian Picciano <me@mediocregopher.com>
Date: Sun, 14 Apr 2024 15:57:56 +0200
Subject: Use difftastic for git diffing

---
 base/gitconfig |  3 +++
 default.nix    | 13 ++++++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/base/gitconfig b/base/gitconfig
index eb1ca38..8732a4d 100644
--- a/base/gitconfig
+++ b/base/gitconfig
@@ -1,6 +1,9 @@
 [include]
     path = custom
 
+[diff]
+    external = "difft --display inline"
+
 [push]
     default = simple
 
diff --git a/default.nix b/default.nix
index 2bec5ec..77e799d 100644
--- a/default.nix
+++ b/default.nix
@@ -47,7 +47,17 @@ in rec {
   git = pkgs.writeScriptBin "git" ''
     #!${pkgs.bash}/bin/bash
     export XDG_CONFIG_HOME=${gitConfig}
-    exec ${pkgs.git}/bin/git "$@"
+    bin="${pkgs.git}/bin/git"
+
+    # Overwrite show an log sub-commands to always set --ext-diff. git aliases
+    # don't allow for overwritting sub-commands, or I'd use them instead.
+    if [ "$1" = "show" ] || [ "$1" = "log" ]; then
+      subCmd="$1"
+      shift
+      exec "$bin" "$subCmd" --ext-diff "$@"
+    fi
+
+    exec "$bin" "$@"
   '';
 
   bin = pkgs.buildEnv {
@@ -78,6 +88,7 @@ in rec {
       pkgs.less
       pkgs.tmux
       pkgs.calc
+      pkgs2305.difftastic
 
       pkgs.man
       pkgs.man-pages
-- 
cgit v1.2.3