feat(home-manager): manage git config from upstream dotfiles repository

profiles/base/default.nix

@@ -20,8 +20,8 @@
     };
   };
   environment.shellAliases = {
-    "nixos-switch" = "sudo nixos-rebuild switch --flake .#";
+    "nixos-switch" = "sudo nixos-rebuild switch --impure --flake .#";
-    "nom-affogato" = "nom build .#nixosConfigurations.affogato.config.system.build.toplevel";
+    "nom-affogato" = "nom build .#nixosConfigurations.affogato.config.system.build.toplevel --impure";
   };
   environment.variables = {
     EDITOR = "vim";

users/transcaffeine/default.nix

@@ -22,5 +22,5 @@
       nix-diff
     ];
   };
-  home-manager.users.transcaffeine = import ./home-manager.nix;
+  home-manager.users.transcaffeine = import ./home-manager/default.nix;
 }

users/transcaffeine/home-manager/default.nix

@@ -1,4 +1,7 @@
 { lib, pkgs, ... }: {
+  imports = [
+    ./git.nix
+  ];
   home.stateVersion = "24.11";
   services.darkman = {
     enable = true;
@@ -9,4 +12,6 @@
       dbusserver = true;
     };
   };
+
+  home.preferXdgDirectories = true;
 }

users/transcaffeine/home-manager/git.nix

@@ -0,0 +1,31 @@
+{ lib, ... }: {
+  programs.git = let
+    gitconfig = builtins.fromTOML (
+      lib.readFile
+        ((builtins.fetchGit {
+          url = "https://git.finally.coffee/transcaffeine/dotfiles.git";
+          ref = "main";
+          rev = "3811febee134e62d3539c472005f04710d913611";
+          shallow = false;
+        }).outPath + "/config/git/gitconfig")
+    );
+    key = gitconfig.user.signingKey;
+    aliases = gitconfig.alias;
+  in {
+    enable = true;
+    userName = gitconfig.user.name;
+    userEmail = gitconfig.user.email;
+    signing = {
+      signByDefault = true;
+      inherit key;
+    };
+    inherit aliases;
+    extraConfig = {
+      format = gitconfig.format;
+      commit = gitconfig.commit;
+      tag = gitconfig.tag;
+      pull = gitconfig.pull;
+      rebase = gitconfig.rebase;
+    };
+  };
+}