.ex files are opened as euphoria3 (again)

[jamesvl]

Summary

.ex files are being set to euphoria3 file types instead of Elixir.

Source of Error

It seems this commit changed the file type settings so that .ex file types are set with setfiletype instead of set filetype=.... This causes them to no longer recognized as Elixir files (they're seen as euphoria3 files, as mentioned previously in issue #121.)

File type settings were working fine for me prior to the commit linked above.

Background

From the commit message:

Note that the Vim runtime ships with a filetype match for *.ex (for Euphoria), but our plugin-based filetype detection still gets the last say.

Maybe the above isn't working right for Neovim? But the vim help page seems to say setfiletype specifically won't work for this:

If you want to detect your file after the default file type checks:
This works like A above, but instead of setting 'filetype' unconditionally
use ":setfiletype". This will only set 'filetype' if no file type was
detected yet.

(note the last sentence; I admit I may be missing information needed to know how plugin-based filetype detection should override this)

My Setup

This is in Neovim 0.3.3 on Linux, using Pathogen to install this plugin; my init.vim has the syntax on line after pathogen#infect().

My (temporary) Workaround

Per the vim manual, put a file named ex.vim into a directory named /ftdetect in your vim config directory (which depends on vim / neovim). Place the following line in that file:

au BufRead,BufNewFile *.ex,*.exs set filetype=elixir

(This could also be place in your .vimrc / init.vim file.)

[jbodah]

Thanks; will revert #473 for now and will see if we can get some test coverage on this. fyi @jparise

[jparise]

Thanks! I tested this locally, but there’s obviously still a case where the standard runtime scripts prevale. Sticking with the current approach is the right call.

[jbodah]

@jparise What is your local setup? I'm running nvim as well on my home machine and noticed it there

[jparise]

Vim 8.1 using vim-plug.

[mhinz]

The whole purpose of setfiletype is to avoid setting a filetype multiple times during a single event (and all its nested events).

Since filetype.vim is sourced very early (triggered by the vimrc or plugin manager using filetype on), setfiletype euphoria3 is done long before ftdetect/elixir.vim is read. When the latter then tries setfiletype elixir, the filetype won't change. Thus using set filetype=elixir is correct.