Respect symlinks for resolving vim-polyglot as fallback, closes #605

compiler/swift.vim

@@ -1,11 +1,6 @@
-let s:base = expand("<sfile>:h:h")
-let Filter = { _, v -> stridx(v, s:base) == -1 && stridx(v, $VIMRUNTIME) == -1 && v !~ "after" }
-let files = filter(globpath(&rtp, 'compiler/swift.vim', 1, 1), Filter)
-if len(files) > 0
-  exec 'source ' . files[0]
+if !polyglot#util#IsEnabled('swift', expand('<sfile>:p'))
   finish
 endif
-if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'swift') == -1
 
 " Vim compiler file
 " Compiler:         Swift Compiler
@@ -46,5 +41,3 @@ unlet s:save_cpo
 " vint: +ProhibitAbbreviationOption
 
 " vim: set et sw=4 sts=4 ts=8:
-
-endif