Use lua for filename-based justfile detection in Neovim >= 0.10

ftdetect/just.lua

@@ -0,0 +1,25 @@
+-- Vim filetype plugin
+-- Language:	Justfile
+-- Maintainer:	Noah Bogart <[email protected]>
+-- URL:		https://github.com/NoahTheDuke/vim-just.git
+-- Last Change:	2024 May 29
+
+if vim.fn.has("nvim-0.10") then
+  vim.filetype.add({
+    extension = {
+      -- Disable extension-based detection of *.just justfiles.
+      -- The extensions table is also matched against the program in shebang lines,
+      -- which in case of just scripts is too broad.
+      just = function()
+        return nil
+      end,
+    },
+
+    -- Neovim adds start/end anchors to the patterns
+    pattern = {
+      ['[Jj][Uu][Ss][Tt][Ff][Ii][Ll][Ee]'] = 'just',
+      ['.*%.[Jj][Uu][Ss][Tt][Ff][Ii][Ll][Ee]'] = 'just',
+      ['.*%.[Jj][Uu][Ss][Tt]'] = 'just',
+    },
+  })
+end

ftdetect/just.vim

@@ -3,5 +3,9 @@
 " Maintainer:	Noah Bogart <[email protected]>
 " URL:		https://github.com/NoahTheDuke/vim-just.git
 " Last Change:	2024 Mar 03
-au BufNewFile,BufRead \c{,*.}justfile,\c*.just  setfiletype just
+
+if !has("nvim-0.10")
+  au BufNewFile,BufRead \c{,*.}justfile,\c*.just  setfiletype just
+endif
+
 au BufNewFile,BufRead *  if getline(1) =~# '\v^#!/%(\w|[-/])*/%(env%(\s+-S)?\s+)?just\A' | setfiletype just | endif

justfile

@@ -23,7 +23,7 @@ npreview JUSTFILE='': (_preview_common 'nvim' JUSTFILE)
 _preview_common vimcmd JUSTFILE:
 	{{vimcmd}} \
 	  -c {{quote("let &runtimepath=\"" + justfile_directory() + ",\" . &runtimepath")}} \
-	  -c {{quote("runtime ftdetect/just.vim")}} \
+	  -c {{quote('runtime ftdetect/just.vim | if has("nvim") | runtime ftdetect/just.lua | endif')}} \
 	  {{if JUSTFILE == '' { '-c "set filetype=just"' } \
 	    else { \
 	      "-c " + quote('edit ' + \