Update fish prompt and add to root user

flake.nix

@@ -21,6 +21,7 @@
       {
         home-manager.users.me = import ./home/common.nix;
         home-manager.extraSpecialArgs = { inherit inputs; };
+        home-manager.users.root = import ./home/root.nix;
       }
     ];
   in {

home/fish/interactive.fish

@@ -13,6 +13,8 @@ function postexec_test --on-event fish_postexec
   echo
 end
 
+set -g fish_prompt_pwd_dir_length 0
+
 function fish_prompt
   set -l last_status $status
   set -l markers
@@ -53,20 +55,93 @@ function fish_prompt
   set_color 9ece6a
   echo -n "$host "
 
+  set -l pwd
+
+  if git rev-parse --show-toplevel >/dev/null 2>&1
+    set -l root (git rev-parse --show-toplevel)
+    set -l rel (string replace "$root/" "" "$PWD")
+    set pwd (basename "$root")
+    if test "$rel" = "$PWD"
+      set pwd (basename "$root")
+    else
+      set pwd (basename "$root")"/"$rel
+    end
+  else
+    set pwd (prompt_pwd)
+  end
+
   set_color 89ddff
-  echo -n (prompt_pwd)
+  echo -n $pwd
+
+  set -l git_info (git status --porcelain=v2 --branch 2>/dev/null)
+
+  if test $status -eq 0
+    set -l branch
+    set -l ahead 0
+    set -l behind 0
+    set -l staged 0
+    set -l modified 0
+    set -l untracked 0
+
+    for line in $git_info
+      switch $line
+        case '# branch.head*'
+          set branch (string split ' ' $line)[3]
+
+        case '# branch.ab*'
+          set -l parts (string split ' ' $line)
+          set ahead (string sub -s 2 -- $parts[3])
+          set behind (string sub -s 2 -- $parts[4])
+
+        case '1*' '2*'
+          set -l xy (string sub -s 3 -l 2 $line)
+          if test (string sub -s 1 -l 1 $xy) != "."
+            set staged (math $staged + 1)
+          end
+          if test (string sub -s 2 -l 1 $xy) != "."
+            set modified (math $modified + 1)
+          end
+        case '?*'
+          set untracked (math $untracked + 1)
+      end
+    end
 
     set_color bb9af7
-  echo -n (fish_git_prompt)
+    echo -n " [$branch"
+
+    test $ahead -gt 0; and echo -n " ↑$ahead"
+    test $behind -gt 0; and echo -n " ↓$behind"
+    test $staged -gt 0; and echo -n " +$staged"
+    test $modified -gt 0; and echo -n " ~$modified"
+    test $untracked -gt 0; and echo -n " ?$untracked"
+
+    echo -n "]"
+  end
 
   if test (count $markers) -gt 0
     set_color ff9e64
     echo -n " ("(string join " " $markers)")"
   end
 
+  set_color white
+
+  if test (count (jobs)) -gt 0
+    echo -n "   "(count (jobs))
+  end
+
+  if set -q SSH_CONNECTION
+    echo -n " on ssh"
+  end
+
   echo
+
+  if fish_is_root_user
+    set_color ff007c
+    echo -n "# "
+  else
     set_color 73daca
     echo -n "λ "
+  end
 
   set_color normal
 end

home/root.nix

@@ -0,0 +1,13 @@
+{ pkgs, ... }:
+
+{
+  imports = [
+    ./fish
+    ./eza
+  ];
+
+  home.username = "root";
+  home.homeDirectory = "/root";
+
+  home.stateVersion = "26.05";
+}

hosts/common.nix

@@ -34,6 +34,8 @@
     useXkbConfig = true;
   };
 
+  users.users.root.shell = pkgs.fish;
+
   users.users.me = {
     isNormalUser = true;
     shell = pkgs.fish;
@@ -53,6 +55,8 @@
   };
 
   environment.systemPackages = with pkgs; [
+    neovim
+    gitui
     libinput
     gnupg
     age