detect source code corruption done by antigen and suggest resetting cache

internal/p10k.zsh

@@ -1,3 +1,25 @@
+if [[ $__p9k_sourced != 2 ]]; then
+  >&2 print -P ""
+  >&2 print -P "[%F{1}ERROR%f]: Corrupted powerlevel10k installation."
+  >&2 print -P ""
+  if (( ${+functions[antigen]} )); then
+    >&2 print -P "If using %Bantigen%b, run the folowing command to fix:"
+    >&2 print -P ""
+    >&2 print -P "    %F{2}antigen%f reset"
+    if [[ -d ~/.antigen ]]; then
+      >&2 print -P ""
+      >&2 print -P "If it doesn't help, try this:"
+      >&2 print -P ""
+      >&2 print -P "    %F{2}rm%f -rf %U~/.antigen%u"
+    fi
+  else
+    >&2 print -P "Try resetting cache in your plugin manager or"
+    >&2 print -P "reinstalling powerlevel10k from scratch."
+  fi
+  >&2 print -P ""
+  return 1
+fi
+
 if ! autoload -Uz is-at-least || ! is-at-least 5.1; then
   () {
     >&2 echo -E "You are using ZSH version $ZSH_VERSION. The minimum required version for Powerlevel10k is 5.1."
@@ -7139,7 +7161,7 @@ fi
 
 _p9k_do_nothing() { true; }
 
-prompt_powerlevel9k_setup() {
+_p9k_setup() {
   (( __p9k_enabled )) && return
 
   prompt_opts=(percent subst)
@@ -7155,6 +7177,8 @@ prompt_powerlevel9k_setup() {
   typeset -ga precmd_functions=(_p9k_do_nothing $precmd_functions _p9k_precmd)
 }
 
+prompt_powerlevel9k_setup() { _p9k_setup }
+
 prompt_powerlevel9k_teardown() {
   eval $__p9k_intro
   add-zsh-hook -D precmd '(_p9k_|powerlevel9k_)*'

powerlevel10k.zsh-theme

@@ -28,14 +28,14 @@
 () {
   eval $__p9k_intro
   if (( $+__p9k_sourced )); then
-    prompt_powerlevel9k_setup
+    (( $+functions[_p9k_setup] )) && _p9k_setup
     return 0
   fi
   typeset -gr __p9k_dump_file=${XDG_CACHE_HOME:-~/.cache}/p10k-dump-${(%):-%n}.zsh
   if [[ $__p9k_dump_file != $__p9k_instant_prompt_dump_file ]] && (( ! $+functions[_p9k_preinit] )) && source $__p9k_dump_file 2>/dev/null && (( $+functions[_p9k_preinit] )); then
     _p9k_preinit
   fi
-  typeset -gr __p9k_sourced=1
+  typeset -gr __p9k_sourced=2
   if [[ -w $__p9k_root_dir && -w $__p9k_root_dir/internal && -w $__p9k_root_dir/gitstatus && ${(%):-%#} == % ]]; then
     local f
     for f in $__p9k_root_dir/{powerlevel9k.zsh-theme,powerlevel10k.zsh-theme,internal/p10k.zsh,internal/icons.zsh,internal/configure.zsh,internal/worker.zsh,gitstatus/gitstatus.plugin.zsh}; do