vim-patch:9.1.0876: filetype: openCL files are not recognized

Problem:  filetype: openCL files are not recognized
Solution: detect '*.cl' files as opencl or lisp filetype,
          include a opencl syntax and filetype plugin (Wu, Zhenyu)

closes: vim/vim#15825

https://github.com/vim/vim/commit/e2c27ca8eff7cc8ec852b531d5a7f328a343a761

Co-authored-by: Wu, Zhenyu <wuzhenyu@ustc.edu>

5 files changed, 53 insertions, 2 deletions

diff --git a/runtime/ftplugin/opencl.vim b/runtime/ftplugin/opencl.vim
new file mode 100644
index 0000000000..e8570fbe95
--- /dev/null
+++ b/runtime/ftplugin/opencl.vim
@@ -0,0 +1,12 @@
+" Vim filetype plugin file
+" Language:	OpenCL
+" Maintainer:	Wu, Zhenyu <wuzhenyu@ustc.edu>
+" Last Change:	2024 Nov 19
+
+if exists("b:did_ftplugin") | finish | endif
+let b:did_ftplugin = 1
+
+setlocal comments=sO:*\ -,mO:*\ \ ,exO:*/,s1:/*,mb:*,ex:*/,:///,://
+setlocal commentstring=/*\ %s\ */ define& include&
+
+let b:undo_ftplugin = "setl commentstring< comments<"
diff --git a/runtime/lua/vim/filetype.lua b/runtime/lua/vim/filetype.lua
index c23beb960c..285b7e2328 100644
--- a/runtime/lua/vim/filetype.lua
+++ b/runtime/lua/vim/filetype.lua
@@ -300,6 +300,7 @@ local extension = {
   cho = 'chordpro',
   chordpro = 'chordpro',
   ck = 'chuck',
+  cl = detect.cl,
   eni = 'cl',
   icl = 'clean',
   cljx = 'clojure',
@@ -688,7 +689,6 @@ local extension = {
   ily = 'lilypond',
   liquid = 'liquid',
   liq = 'liquidsoap',
-  cl = 'lisp',
   L = 'lisp',
   lisp = 'lisp',
   el = 'lisp',
diff --git a/runtime/lua/vim/filetype/detect.lua b/runtime/lua/vim/filetype/detect.lua
index 98b001bd51..81b94c69db 100644
--- a/runtime/lua/vim/filetype/detect.lua
+++ b/runtime/lua/vim/filetype/detect.lua
@@ -181,6 +181,16 @@ function M.changelog(_, bufnr)
 end
 
 --- @type vim.filetype.mapfn
+function M.cl(_, bufnr)
+  local lines = table.concat(getlines(bufnr, 1, 4))
+  if lines:match('/%*') then
+    return 'opencl'
+  else
+    return 'lisp'
+  end
+end
+
+--- @type vim.filetype.mapfn
 function M.class(_, bufnr)
   -- Check if not a Java class (starts with '\xca\xfe\xba\xbe')
   if not getline(bufnr, 1):find('^\202\254\186\190') then
diff --git a/runtime/syntax/opencl.vim b/runtime/syntax/opencl.vim
new file mode 100644
index 0000000000..c237aa30f9
--- /dev/null
+++ b/runtime/syntax/opencl.vim
@@ -0,0 +1,13 @@
+" Vim syntax file
+" Language:	OpenCL
+" Last Change:	2024 Nov 19
+" Maintainer:	Wu, Zhenyu <wuzhenyu@ustc.edu>
+
+if exists("b:current_syntax")
+  finish
+endif
+
+" TODO: support openCL specific keywords
+runtime! syntax/c.vim
+
+let current_syntax = "opencl"
diff --git a/test/old/testdir/test_filetype.vim b/test/old/testdir/test_filetype.vim
index 889386ae5b..1caed9a9da 100644
--- a/test/old/testdir/test_filetype.vim
+++ b/test/old/testdir/test_filetype.vim
@@ -422,7 +422,7 @@ func s:GetFilenameChecks() abort
     \ 'limits': ['/etc/limits', '/etc/anylimits.conf', '/etc/anylimits.d/file.conf', '/etc/limits.conf', '/etc/limits.d/file.conf', '/etc/some-limits.conf', '/etc/some-limits.d/file.conf', 'any/etc/limits', 'any/etc/limits.conf', 'any/etc/limits.d/file.conf', 'any/etc/some-limits.conf', 'any/etc/some-limits.d/file.conf'],
     \ 'liquidsoap': ['file.liq'],
     \ 'liquid': ['file.liquid'],
-    \ 'lisp': ['file.lsp', 'file.lisp', 'file.asd', 'file.el', 'file.cl', '.emacs', '.sawfishrc', 'sbclrc', '.sbclrc', 'file.stsg', 'any/local/share/supertux2/config'],
+    \ 'lisp': ['file.lsp', 'file.lisp', 'file.asd', 'file.el', '.emacs', '.sawfishrc', 'sbclrc', '.sbclrc', 'file.stsg', 'any/local/share/supertux2/config'],
     \ 'lite': ['file.lite', 'file.lt'],
     \ 'litestep': ['/LiteStep/any/file.rc', 'any/LiteStep/any/file.rc'],
     \ 'logcheck': ['/etc/logcheck/file.d-some/file', '/etc/logcheck/file.d/file', 'any/etc/logcheck/file.d-some/file', 'any/etc/logcheck/file.d/file'],
@@ -1192,6 +1192,22 @@ func Test_cfg_file()
   filetype off
 endfunc
 
+func Test_cl_file()
+  filetype on
+
+  call writefile(['/*', ' * Xfile.cl', ' */', 'int f() {}'], 'Xfile.cl')
+  split Xfile.cl
+  call assert_equal('opencl', &filetype)
+  bwipe!
+
+  call writefile(['()'], 'Xfile.cl')
+  split Xfile.cl
+  call assert_equal('lisp', &filetype)
+  bwipe!
+
+  filetype off
+endfunc
+
 func Test_d_file()
   filetype on