Added support for setting the g:tex_flavor option

modules/plugins/languages/tex.nix

@@ -11,7 +11,6 @@
 #   - completion
 #   - inlayHints
 #   - experimental
-
 {
   config,
   pkgs,
@@ -22,13 +21,20 @@ let
   inherit (lib.options) mkEnableOption mkOption;
   inherit (lib.modules) mkIf mkMerge;
   inherit (lib.types)
-    package
-    str
     bool
     listOf
+    package
+    str
     ;
   inherit (lib.nvim.types) mkGrammarOption;
-  inherit (builtins) any attrValues;
+  inherit (builtins)
+    any
+    attrValues
+    concatStringsSep
+    length
+    map
+    toString
+    ;
 
   cfg = config.vim.languages.tex;
 in
@@ -204,7 +210,6 @@ in
                 - %l: The current line number.
             '';
           };
-
         };
 
         extraLuaSettings = mkOption {
@@ -235,12 +240,49 @@ in
       };
 
       # Add other LSPs here
+    };
 
+    extraOpts = {
+      texFlavor = {
+        enable = mkOption {
+          type = bool;
+          default = false;
+          example = true;
+          description = ''
+            Whether to set the vim.g.tex_flavor (g:tex_flavor) option in your lua config.
+
+            When opening a .tex file vim will try to automatically try to determine the file type from
+            the three options: plaintex (for plain TeX), context (for ConTeXt), or tex (for LaTeX).
+            This can either be done by a indicator line of the form `%&<format>` on the first line or
+            if absent vim will search the file for keywords to try and determine the filetype.
+            If no filetype can be determined automatically then by default it will fallback to plaintex.
+
+            This option will enable setting the tex flavor in your lua config and you can set its value
+            useing the `vim.languages.tex.lsp.extraOpts.texFlavor.flavor = <flavor>` in your nvf config.
+
+            Setting this option to `false` will omit the `vim.g.tex_flavor = <flavor>` line from your lua
+            config entirely (unless you manually set it elsewhere of course).
+          '';
+        };
+        flavor = mkOption {
+          type = str;
+          default = "plaintex";
+          example = "tex";
+          description = ''
+            The flavor to set as a fallback for when vim cannot automatically determine the tex flavor when
+            opening a .tex document.
+
+            The options are: plaintex (for plain TeX), context (for ConTeXt), or tex (for LaTeX).
+
+            This can be particularly useful for when using `vim.utility.new-file-template` options for
+            creating templates when no context has yet been added to a new file.
+          '';
+        };
+      };
     };
   };
 
   config = mkIf cfg.enable (mkMerge [
-
     # Treesitter
     (mkIf cfg.treesitter.latex.enable {
       vim.treesitter.enable = true;
@@ -257,16 +299,9 @@ in
         vim.lsp.lspconfig.enable = true; # Enable lspconfig when any of the lsps are enabled
       }
       // (mkMerge [
-
         # Texlab
         (
           let
-            inherit (builtins)
-              length
-              concatStringsSep
-              map
-              toString
-              ;
             tl = cfg.lsp.texlab;
             build = tl.build;
 
@@ -315,5 +350,9 @@ in
       ])
     ))
 
+    # Extra Lua config options
+    (mkIf cfg.extraOpts.texFlavor.enable {
+      vim.globals.tex_flavor = "${cfg.extraOpts.texFlavor.flavor}";
+    })
   ]);
 }