shell fix

nix-darwin/home.nix

@@ -94,7 +94,8 @@
     gh
 
     # c/c++
-    gcc
+    # gcc
+    clang
 
     # haskell
     ghc
@@ -175,7 +176,8 @@
   #  /etc/profiles/per-user/elal/etc/profile.d/hm-session-vars.sh
   #
   home.sessionVariables = {
-    # EDITOR = "emacs";
+    EDITOR = "nvim";
+    SHELL = "${pkgs.zsh}/bin/zsh";
   };
 
   # Let Home Manager install and manage itself.
@@ -208,6 +210,18 @@
       ccd = "echo $PWD | xcopy";
       cr = "cd $(git rev-parse --show-toplevel)";
     };
+    initExtra = ''
+      # Function to check if we're in a nix-shell
+      in_nix_shell() {
+        if [ -n "$IN_NIX_SHELL" ]; then
+          echo "(devenv) "
+        fi
+      }
+      
+      # Set the prompt
+      setopt PROMPT_SUBST
+      export PS1='$(in_nix_shell)%B%F{cyan}%~%f%b %# '
+    '';
     oh-my-zsh = {
       enable = true;
       theme = "half-life";