git: Add support for multiple identities

modules/packages/git.nix

@@ -1,21 +1,49 @@
-{ ... }:
+{ pkgs, lib, ... }:
 
-{
+let
+  ugp = "/nix/config/secrets/git_uni";
+in {
   home-manager.users.hu = {
-    programs.git = {
-      enable = true;
+    home.file."/home/hu/.config/git/personal" = {
+      text = ''
+        [user]
+          email = "me@caem.dev"
+          name = "caem"
+          signingKey = "E50FC66B5062070DC462661C69A830D03203405F"
 
-      userName = "caem";
-      userEmail = "me@caem.dev";
-      signing = {
-        key = "E50FC66B5062070DC462661C69A830D03203405F";
-        signByDefault = true;
-      };
+        [tag]
+          gpgSign = true
 
-      extraConfig = {
-        init.defaultBranch = "master";
-        pull.rebase = true;
-      };
+        [init]
+          defaultBranch = "master"
+
+        [pull]
+          rebase = true
+      '';
+    };
+
+    home.file."/home/hu/.config/git/uni" = (lib.mkIf (builtins.pathExists ugp) {
+      source = "/nix/config/secrets/git_uni";
+    });
+
+    home.file."/home/hu/.config/git/config" = {
+      text = ''
+        [gpg]
+          program = "${pkgs.gnupg}/bin/gpg2"
+
+        [includeIf "gitdir:~/programming/personal/**"]
+          path = ~/.config/git/personal
+
+        [includeIf "gitdir:~/programming/forks/**"]
+          path = ~/.config/git/personal
+
+      '' + (if builtins.pathExists ugp then ''
+        [includeIf "gitdir:~/programming/uni/**"]
+          path = ~/.config/git/uni
+
+      '' else ''
+        # Uni config omitted
+      '');
     };
   };
 }