vim-patch:9.1.0735: filetype: salt files are not recognized

Problem:  filetype: salt files are not recognized
Solution: Detect '*.sls' files as filetype salt,
          include a syntax script (Gregory Anders)

closes: vim/vim#15689

89b9bb4ac8

Co-authored-by: Gregory Anders <greg@gpanders.com>

runtime/lua/vim/filetype.lua

@@ -1024,6 +1024,7 @@ local extension = {
   rake = 'ruby',
   rs = 'rust',
   sage = 'sage',
+  sls = 'salt',
   sas = 'sas',
   sass = 'sass',
   sa = 'sather',

runtime/syntax/salt.vim

@@ -0,0 +1,16 @@
+" Vim syntax file
+" Maintainer: Gregory Anders
+" Last Changed: 2024-09-16
+
+if exists('b:current_syntax')
+  finish
+endif
+
+" Salt state files are just YAML with embedded Jinja
+runtime! syntax/yaml.vim
+unlet! b:current_syntax
+
+runtime! syntax/jinja.vim
+unlet! b:current_syntax
+
+let b:current_syntax = 'salt'

test/old/testdir/test_filetype.vim

@@ -633,6 +633,7 @@ func s:GetFilenameChecks() abort
     \ 'rtf': ['file.rtf'],
     \ 'ruby': ['.irbrc', 'irbrc', '.irb_history', 'irb_history', 'file.rb', 'file.rbw', 'file.gemspec', 'file.ru', 'Gemfile', 'file.builder', 'file.rxml', 'file.rjs', 'file.rant', 'file.rake', 'rakefile', 'Rakefile', 'rantfile', 'Rantfile', 'rakefile-file', 'Rakefile-file', 'Puppetfile', 'Vagrantfile'],
     \ 'rust': ['file.rs'],
+    \ 'salt': ['file.sls'],
     \ 'samba': ['smb.conf'],
     \ 'sas': ['file.sas'],
     \ 'sass': ['file.sass'],