From 919ee3e5cf96a7910cb032bab3bf0f82b929808e Mon Sep 17 00:00:00 2001
From: Kate Adkins <kate@deprekated.net>
Date: Fri, 15 Nov 2024 06:03:02 -0700
Subject: [PATCH] git: add mergiraf and difftastic

---
 flake.nix                          |  1 +
 nixos/configs/dotfiles/default.nix |  1 +
 nixos/configs/dotfiles/git.hm.nix  | 59 ++++++++++++++++++++++++++++++
 nixos/configs/dotfiles/hm.nix      | 19 ----------
 nixos/packages/default.pkgs.nix    |  6 ++-
 packages/mergiraf.nix              | 29 +++++++++++++++
 6 files changed, 94 insertions(+), 21 deletions(-)
 create mode 100644 nixos/configs/dotfiles/git.hm.nix
 create mode 100644 packages/mergiraf.nix

diff --git a/flake.nix b/flake.nix
index f02f714..be2731b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -144,6 +144,7 @@
           avbroot = callPackage ./packages/avbroot { };
           okc-agents = callPackage ./packages/okc-agents.nix { };
           _7zz = pkgs._7zz.override { useUasm = true; };
+          mergiraf = callPackage ./packages/mergiraf.nix { };
 
           # libraries
           libnfc-nci = callPackage ./packages/libnfc-nci { };
diff --git a/nixos/configs/dotfiles/default.nix b/nixos/configs/dotfiles/default.nix
index 01f5aaf..3fe830d 100644
--- a/nixos/configs/dotfiles/default.nix
+++ b/nixos/configs/dotfiles/default.nix
@@ -12,5 +12,6 @@
   imports = [
     (normalizeModule ./kakoune.hm.nix)
     (normalizeModule ./kakoune-lsp.hm.nix)
+    (normalizeModule ./git.hm.nix)
   ];
 }
diff --git a/nixos/configs/dotfiles/git.hm.nix b/nixos/configs/dotfiles/git.hm.nix
new file mode 100644
index 0000000..1c696fa
--- /dev/null
+++ b/nixos/configs/dotfiles/git.hm.nix
@@ -0,0 +1,59 @@
+{ deprekages, pkgs, ... }:
+{
+
+  #
+  # Git.
+  #
+  programs.git = {
+    enable = true;
+    lfs.enable = true;
+
+    # Note: we no longer set a name, here, forcing us to choose our e-mail and username
+    # on a per-project basis.
+
+    # Proide the difftastic command.
+    difftastic.enable = true;
+
+    extraConfig = {
+      # Use main as our branch names.
+      init.defaultBranch = "main";
+
+      #
+      # Use mergiraf.
+      #
+
+      # Set up the merge driver...
+      merge.mergiraf = {
+        name = "mergiraf";
+        driver = "${deprekages.mergiraf}/bin/mergiraf merge --git %O %A %B -s %S -x %X -y %Y -p %P";
+      };
+
+      # ... and set when to use it.
+      core.attributesFile = toString (
+        pkgs.writeText ".gitattributes" ''
+          				*.java merge=mergiraf
+                  *.rs merge=mergiraf
+                  *.go merge=mergiraf
+                  *.js merge=mergiraf
+                  *.jsx merge=mergiraf
+                  *.json merge=mergiraf
+                  *.yml merge=mergiraf
+                  *.yaml merge=mergiraf
+                  *.html merge=mergiraf
+                  *.htm merge=mergiraf
+                  *.xhtml merge=mergiraf
+                  *.xml merge=mergiraf
+                  *.c merge=mergiraf
+                  *.cc merge=mergiraf
+                  *.h merge=mergiraf
+                  *.cpp merge=mergiraf
+                  *.hpp merge=mergiraf
+                  *.cs merge=mergiraf
+                  *.dart merge=mergiraf
+            		''
+      );
+
+    };
+  };
+
+}
diff --git a/nixos/configs/dotfiles/hm.nix b/nixos/configs/dotfiles/hm.nix
index 7a8f2c8..f2035c5 100644
--- a/nixos/configs/dotfiles/hm.nix
+++ b/nixos/configs/dotfiles/hm.nix
@@ -6,25 +6,6 @@
   # Tie our configruation to the version it was written for.
   home.stateVersion = "24.05";
 
-  #
-  # Git.
-  #
-  programs.git = {
-    enable = true;
-    lfs.enable = true;
-
-    # Note: we no longer set a name, here, forcing us to choose our e-mail and username
-    # on a per-project basis.
-
-    # Use main as our branch names.
-    extraConfig = {
-      init.defaultBranch = "main";
-    };
-  };
-
-  # Manuals are broken on macOS, for now. :(
-  manual.manpages.enable = false;
-
   #
   # "Raw file" dotfiles.
   # These aren't generated by Nix, specifically so we can use them on Windows as well.
diff --git a/nixos/packages/default.pkgs.nix b/nixos/packages/default.pkgs.nix
index 8e33659..09095f0 100644
--- a/nixos/packages/default.pkgs.nix
+++ b/nixos/packages/default.pkgs.nix
@@ -67,6 +67,10 @@ with pkgs;
   cyberchef
   dasel
   delta
+  deprekages.age-plugin-yubikey
+  deprekages.avbroot
+  deprekages.mergiraf
+  difftastic
   dmidecode
   dterm
   edir
@@ -90,8 +94,6 @@ with pkgs;
   jre
   jmtpfs
   killall
-  deprekages.age-plugin-yubikey
-  deprekages.avbroot
   libimobiledevice
   libsecret
   lz4
diff --git a/packages/mergiraf.nix b/packages/mergiraf.nix
new file mode 100644
index 0000000..d85bf44
--- /dev/null
+++ b/packages/mergiraf.nix
@@ -0,0 +1,29 @@
+{
+  lib,
+  rustPlatform,
+  fetchFromGitea,
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "mergiraf";
+  version = "0.3.1";
+
+  doCheck = false;
+
+  src = fetchFromGitea {
+    domain = "codeberg.org";
+    owner = "mergiraf";
+    repo = "mergiraf";
+    rev = "v${version}";
+    hash = "sha256-ORCGGSODZnZH3Ukzmqrweth4KggWGt5YFYEqA4DbTls=";
+  };
+
+  cargoHash = "sha256-Rr59x+/sDA0ttkVZh7hVhnvkNogQj9q9aXomNjHIXII=";
+
+  meta = {
+    description = "A syntax-aware git merge driver for a growing collection of programming languages and file formats";
+    homepage = "https://codeberg.org/mergiraf/mergiraf/releases";
+    license = lib.licenses.gpl3Only;
+    mainProgram = "mergiraf";
+  };
+}