Prefer .ctags over g:rails_ctags_arguments

Author: tpope

autoload/rails.vim

@@ -1073,7 +1073,7 @@ function! rails#new_app_command(bang,...) abort
   return ''
 endfunction
 
-function! s:app_tags_command() dict
+function! s:app_tags_command() dict abort
   if exists("g:Tlist_Ctags_Cmd")
     let cmd = g:Tlist_Ctags_Cmd
   elseif executable("exuberant-ctags")
@@ -1090,8 +1090,19 @@ function! s:app_tags_command() dict
     call s:error("ctags not found")
     return ''
   endif
-  let args = s:split(get(g:, 'rails_ctags_arguments', '--languages=ruby'))
-  exe '!'.cmd.' -f '.s:escarg(self.path("tags")).' -R '.join(args,' ').' '.s:escarg(self.path())
+  let cd = exists('*haslocaldir') && haslocaldir() ? 'lcd' : 'cd'
+  let cwd = getcwd()
+  try
+    execute cd fnameescape(self.path())
+    if self.has_path('.ctags')
+      let args = []
+    else
+      let args = s:split(get(g:, 'rails_ctags_arguments', '--languages=ruby'))
+    endif
+    exe '!'.cmd.' -f '.s:escarg(self.path("tags")).' -R '.join(args,' ')
+  finally
+    execute cd fnameescape(cwd)
+  endtry
   return ''
 endfunction
 

doc/rails.txt

@@ -849,6 +849,9 @@ Ruby files.
 >
 	let g:rails_ctags_arguments = ['--languages=ruby']
 <
+This option is ignored if a ctags configuration file named .ctags is found in
+the root of the project.
+
 						*g:rails_projections*  >
 Defines the set of globally available projections.  See |rails-projections|.
 Where possible, it is generally advisable to use |g:rails_gem_projections| or