add function to determine windows wsl and a function to open links in Windows web browser if wsl is used

settings/pre-settings.el

@@ -41,6 +41,14 @@
   (memq system-type '(windows-nt cygwin32 cygwin))
   "Non-nil if and only if we're running on Windows.
 Both Win32 and Cygwin count.")
+;; https://stackoverflow.com/questions/60922620/shell-script-to-check-if-running-in-windows-when-using-wsl
+(defvar running-on-windows-wsl
+  (string-equal
+   (replace-regexp-in-string
+    "[ \n]+$" ""
+    (shell-command-to-string
+     "uname -a | sed -n 's/.*\\( *Microsoft *\\).*/\\1/ip'"))
+   "Microsoft"))
 (setq user-emacs-directory "~/.config/emacs/")
 (defconst user-cache-directory
   (file-name-as-directory (concat user-emacs-directory ".cache"))