Add xdg settings, cache, cleanup script

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

users/common/configs/xdg/default.nix

@@ -0,0 +1,44 @@
+{ config, lib, ... }:
+
+let
+  users = lib.attrsets.filterAttrs (name: config: config.isNormalUser) config.users.users;
+in {
+  home-manager.users = lib.attrsets.mapAttrs (user: cfg: (let
+    cacheHome = "${cfg.home}/.cache";
+    configHome = "${cfg.home}/.config";
+    dataHome = "${cfg.home}/.local/share";
+    stateHome = "${cfg.home}/.local/state";
+    xdgVmDir = "${cfg.home}/VMs";
+    xdgGitDir = "${cfg.home}/git";
+  in {
+    xdg = {
+      enable = true;
+      mimeApps.enable = true;
+
+      inherit cacheHome;
+      inherit configHome;
+      inherit dataHome;
+      inherit stateHome;
+
+      userDirs = {
+        enable = true;
+        extraConfig = {
+          XDG_VM_DIR = xdgVmDir;
+          XDG_GIT_DIR = xdgGitDir;
+        };
+      };
+    };
+
+    home.persistence."/persist${cfg.home}".directories = [
+      "Desktop"  # userDirs.desktop
+      "Documents"  # userDirs.documents
+      "Downloads"  # userDirs.download
+      "Music"  # userDirs.music
+      "Pictures"  # userDirs.pictures
+      "Templates"  # userDirs.templates
+      "Videos"  # userDirs.videos
+      "VMs"  # xdgVmDir
+      "git"  # xdgGitDir
+    ];
+  })) users;
+}