From 8310f2052636d70b6e8dc38c83c9b73012841177 Mon Sep 17 00:00:00 2001
From: zeertzjq <zeertzjq@outlook.com>
Date: Mon, 1 Dec 2025 09:27:29 +0800
Subject: [PATCH] vim-patch:9.1.1935: filetype: not all Erlang files are
 recognized

Problem:  filetype: not all Erlang files are recognized
Solution: Detect *.app.src and rebar.config files as erlang filetype
          (John Parise).

*.app.src files contain Erlang application definitions. (There are also
*.app files, which are similar but more often build artifacts, and that
file extension is too ambiguous to be recognized by default.)

Reference:
- https://www.erlang.org/doc/system/applications.html

Rebar is the Erlang build tool. rebar.config uses Erlang syntax.

Reference:
- https://rebar3.org/docs/configuration/configuration/

closes: vim/vim#18835

https://github.com/vim/vim/commit/2b2580e61a853617173f907bd42e12a073cf2410

Co-authored-by: Jon Parise <jon@indelible.org>
---
 runtime/lua/vim/filetype.lua       | 2 ++
 test/old/testdir/test_filetype.vim | 2 +-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/runtime/lua/vim/filetype.lua b/runtime/lua/vim/filetype.lua
index 47189ce51e..2de42da938 100644
--- a/runtime/lua/vim/filetype.lua
+++ b/runtime/lua/vim/filetype.lua
@@ -1605,6 +1605,7 @@ local filename = {
   Earthfile = 'earthfile',
   ['.editorconfig'] = 'editorconfig',
   ['elinks.conf'] = 'elinks',
+  ['rebar.config'] = 'erlang',
   ['mix.lock'] = 'elixir',
   ['filter-rules'] = 'elmfilt',
   ['exim.conf'] = 'exim',
@@ -2631,6 +2632,7 @@ local pattern = {
     ['^www%.conf'] = starsetf('dosini'),
     ['^drac%.'] = starsetf('dracula'),
     ['/dtrace/.*%.d$'] = 'dtrace',
+    ['%.app%.src$'] = 'erlang',
     ['esmtprc$'] = 'esmtprc',
     ['/0%.orig/'] = starsetf(detect.foam),
     ['/0/'] = starsetf(detect.foam),
diff --git a/test/old/testdir/test_filetype.vim b/test/old/testdir/test_filetype.vim
index 36ff82d2a1..0c814c916e 100644
--- a/test/old/testdir/test_filetype.vim
+++ b/test/old/testdir/test_filetype.vim
@@ -275,7 +275,7 @@ func s:GetFilenameChecks() abort
     \ 'elsa': ['file.lc'],
     \ 'elvish': ['file.elv'],
     \ 'epuppet': ['file.epp'],
-    \ 'erlang': ['file.erl', 'file.hrl', 'file.yaws'],
+    \ 'erlang': ['file.erl', 'file.hrl', 'file.yaws', 'file.app.src', 'rebar.config'],
     \ 'eruby': ['file.erb', 'file.rhtml'],
     \ 'esdl': ['file.esdl'],
     \ 'esmtprc': ['anyesmtprc', 'esmtprc', 'some-esmtprc'],