Only call find on directories.

Library/Homebrew/cask/pkg.rb

@@ -111,27 +111,34 @@ module Cask
       set -euo pipefail
 
       for path in "${@}"; do
-        if [[ ! -e "${path}" ]]; then
+        symlink=true
+        [[ -L "${path}" ]] || symlink=false
+
+        directory=false
+        if [[ -d "${path}"  ]]; then
+          directory=true
+
+          if [[ -e "${path}/.DS_Store" ]]; then
+            /bin/rm -- "${path}/.DS_Store"
+          fi
+
+          # Some packages leave broken symlinks around; we clean them out before
+          # attempting to `rmdir` to prevent extra cruft from accumulating.
+          /usr/bin/find -f "${path}" -- -mindepth 1 -maxdepth 1 -type l ! -exec /bin/test -e {} \; -delete
+        elif ! ${symlink} && [[ ! -e "${path}" ]]; then
+          # Skip paths that don't exists and aren't a broken symlink.
           continue
         fi
 
-        if [[ -e "${path}/.DS_Store" ]]; then
-          /bin/rm -f "${path}/.DS_Store"
-        fi
-
-        # Some packages leave broken symlinks around; we clean them out before
-        # attempting to `rmdir` to prevent extra cruft from accumulating.
-        /usr/bin/find "${path}" -mindepth 1 -maxdepth 1 -type l ! -exec /bin/test -e {} \; -delete
-
-        if [[ -L "${path}" ]]; then
+        if ${symlink}; then
           # Delete directory symlink.
-          /bin/rm "${path}"
-        elif [[ -d "${path}" ]]; then
+          /bin/rm -- "${path}"
+        elif ${directory}; then
           # Delete directory if empty.
-          /usr/bin/find "${path}" -maxdepth 0 -type d -empty -exec /bin/rmdir {} \;
+          /usr/bin/find -f "${path}" -- -maxdepth 0 -type d -empty -exec /bin/rmdir -- {} \;
         else
           # Try `rmdir` anyways to show a proper error.
-          /bin/rmdir "${path}"
+          /bin/rmdir -- "${path}"
         fi
       done
     BASH