Fix projectile-find-file locking up Emacs

This occurs when invoking it from the root of massive file trees, like
$HOME or certain non-project folders. It's better that it defer to a
different command altogether (counsel-find-file) if invoked from $HOME,
and counsel-file-jump from anywhere else, which offers approximately
what we want, but at a fraction of the performance cost in those cases.

modules/completion/ivy/autoload/ivy.el

@@ -208,6 +208,24 @@ search current file. See `+ivy-task-tags' to customize what this searches for."
 ;; File searching
 ;;
 
+;;;###autoload
+(defun +ivy/projectile-find-file ()
+  "A more sensible `projectile-find-file', which will revert to
+`counsel-find-file' if invoked from $HOME (usually not what you want), or
+`counsel-file-jump' if invoked from a non-project.
+
+Both are much faster than letting `projectile-find-file' index massive file
+trees."
+  (interactive)
+  (call-interactively
+   (cond ((or (file-equal-p default-directory "~")
+              (when-let* ((proot (doom-project-root 'nocache)))
+                (file-equal-p proot "~")))
+          #'counsel-find-file)
+         ((doom-project-p 'nocache)
+          #'projectile-find-file)
+         (#'counsel-file-jump))))
+
 ;;;###autoload
 (cl-defun +ivy-file-search (engine &key query in all-files (recursive t))
   "Conduct a file search using ENGINE, which can be any of: rg, ag, pt, and

modules/completion/ivy/config.el

@@ -159,7 +159,7 @@ immediately runs it on the current candidate (ending the ivy session)."
              counsel-projectile-grep counsel-projectile-ag counsel-projectile-switch-project)
   :init
   (define-key! 'global
-    [remap projectile-find-file]        #'counsel-projectile-find-file
+    [remap projectile-find-file]        #'+ivy/projectile-find-file
     [remap projectile-find-dir]         #'counsel-projectile-find-dir
     [remap projectile-switch-to-buffer] #'counsel-projectile-switch-to-buffer
     [remap projectile-grep]             #'counsel-projectile-grep