Add xdg settings, cache, cleanup script

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

users/configs/git/default.nix

@@ -1,6 +1,8 @@
-{ user ? throw "user argument is required" }: { pkgs, ... }:
+{ user ? throw "user argument is required" }: { config, pkgs, ... }:
 
-{
+let
+  hmConfig = config.home-manager.users."${user.name}";
+in {
   home-manager.users."${user.name}" = {
     programs.git = {
       enable = true;
@@ -14,7 +16,7 @@
       extraConfig.credential.helper = "store";
       hooks = let
         commit-msg-hook = pkgs.writeShellScriptBin "git-commit-msg" ''
-          git interpret-trailers --if-exists doNothing --trailer \
+          ${pkgs.git}/bin/git interpret-trailers --if-exists doNothing --trailer \
             "Signed-off-by: $(git config user.name) <$(git config user.email)>" \
             --in-place "$1"
         '';
@@ -22,5 +24,7 @@
         commit-msg = "${commit-msg-hook}/bin/git-commit-msg";
       };
     };
+
+    sops.secrets."git".path = "${hmConfig.xdg.configHome}/git/credentials";
   };
 }