Update Fish prompt

home/fish/config.fish

@@ -1,5 +1,14 @@
 set -gx fish_greeting
 
+function nix
+  if test "$argv[1]" = "develop"
+    command nix develop -c fish $argv[2..-1]
+  else if test "$argv[1]" = "shell"
+    env IN_NIX_SHELL=shell command nix $argv
+  else
+    command nix $argv
+  end
+end
 function a
   for arg in $argv
     if string match -q '*/' $arg

home/fish/interactive.fish

@@ -1,3 +1,64 @@
 if test "$KITTY_STR" = "1"
+  if not set -q _FASTFETCH_RUN
+    set -gx _FASTFETCH_RUN 1
     fastfetch
+  end
+end
+
+function fish_prompt
+  set -l last_status $status
+  set -l markers
+  set -l user $USER
+  set -l host (hostname)
+
+  if test -n "$IN_NIX_SHELL"
+    if test "$IN_NIX_SHELL" = "shell"
+      set -a markers "nix-shell"
+    else if test "$IN_NIX_SHELL" = "pure"; or test "$IN_NIX_SHELL" = "impure"
+      set -a markers "nix-develop"
+    end
+  end
+
+  if test -n "$VIRTUAL_ENV"
+    set -a markers "venv:"(basename "$VIRTUAL_ENV")
+  end
+
+  if test -n "$CONDA_DEFAULT_ENV"
+    set -a markers "conda:"$CONDA_DEFAULT_ENV
+  end
+
+  if test -n "$BUN_INSTALL"
+    set -a markers "bun"
+  end
+
+  if test $last_status -ne 0
+    set_color ff007c
+    echo -n "[$last_status] "
+  end
+
+  set_color 7aa2f7
+  echo -n "$user"
+
+  set_color white
+  echo -n "@"
+
+  set_color 9ece6a
+  echo -n "$host "
+
+  set_color 89ddff
+  echo -n (prompt_pwd)
+
+  set_color bb9af7
+  echo -n (fish_git_prompt)
+
+  if test (count $markers) -gt 0
+    set_color ff9e64
+    echo -n " ("(string join " " $markers)")"
+  end
+
+  echo
+  set_color 73daca
+  echo -n "λ "
+
+  set_color normal
 end