patch 9.1.0610: filetype: OpenGL Shading Language files are not detected

Problem:  filetype: OpenGL Shading Language files are not detected
Solution: detect various file extensions as GLSL filetype, include
          indent and syntax script, do no longer recognize '*.comp'
          as Mason filetype (Gregory Anders)

closes: #15317

Signed-off-by: Gregory Anders <greg@gpanders.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

.github/MAINTAINERS

@@ -306,6 +306,7 @@ runtime/indent/freebasic.vim		@dkearns
 runtime/indent/gdscript.vim		@habamax
 runtime/indent/gitconfig.vim		@tpope
 runtime/indent/gitolite.vim		@sitaramc
+runtime/indent/glsl.vim		@gpanders
 runtime/indent/go.vim			@dbarnett
 runtime/indent/gyp.vim			@ObserverOfTime
 runtime/indent/haml.vim			@tpope
@@ -439,6 +440,7 @@ runtime/syntax/gitconfig.vim		@tpope
 runtime/syntax/gitignore.vim		@ObserverOfTime
 runtime/syntax/gitolite.vim		@sitaramc
 runtime/syntax/gitrebase.vim		@tpope
+runtime/syntax/glsl.vim		@gpanders
 runtime/syntax/go.vim			@bhcleek
 runtime/syntax/godoc.vim		@dbarnett
 runtime/syntax/gp.vim			@KBelabas

runtime/filetype.vim

@@ -915,7 +915,9 @@ au BufNewFile,BufRead gkrellmrc,gkrellmrc_?	setf gkrellmrc
 au BufNewFile,BufRead *.gleam			setf gleam
 
 " GLSL
-au BufNewFile,BufRead *.glsl			setf glsl
+" Extensions supported by Khronos reference compiler (with one exception, ".glsl")
+" https://github.com/KhronosGroup/glslang
+au BufNewFile,BufRead *.vert,*.tesc,*.tese,*.glsl,*.geom,*.frag,*.comp,*.rgen,*.rmiss,*.rchit,*.rahit,*.rint,*.rcall	setf glsl
 
 " GN (generate ninja) files
 au BufNewFile,BufRead *.gn,*.gni		setf gn
@@ -1414,8 +1416,8 @@ au BufNewFile,BufRead *.markdown,*.mdown,*.mkd,*.mkdn,*.mdwn,*.md
 	\   setf markdown |
 	\ endif
 
-" Mason
-au BufNewFile,BufRead *.mason,*.mhtml,*.comp	setf mason
+" Mason (it used to include *.comp, are those Mason files?)
+au BufNewFile,BufRead *.mason,*.mhtml	setf mason
 
 " Mathematica, Matlab, Murphi, Objective C or Octave
 au BufNewFile,BufRead *.m			call dist#ft#FTm()

runtime/indent/glsl.vim

@@ -0,0 +1,14 @@
+" Language: OpenGL Shading Language
+" Maintainer: Gregory Anders <greg@gpanders.com>
+" Last Modified: 2024 Jul 21
+" Upstream: https://github.com/tikhomirov/vim-glsl
+
+if exists('b:did_indent')
+  finish
+endif
+let b:did_indent = 1
+
+setlocal autoindent cindent
+setlocal cinoptions&
+
+let b:undo_indent = 'setl ai< ci< cino<'