treesitter: make foldenable configurable

docs/manual/release-notes/rl-0.9.md

@@ -22,7 +22,6 @@
   ```
 
   Some other settings and commands are now deprecated but are still supported.
-
   - The `setupOpts.mappings` options were also removed. Use the built-in Neovim
     settings (nvf's {option}`vim.keymaps`)
 
@@ -35,7 +34,6 @@
 - "Correct `languages.go.treesitter` to contain all Go file types.
   `languages.go.treesitter.package` is now `languages.go.treesitter.goPackage`.
   New are:
-
   - `languages.go.treesitter.goPackage`.
 
   - `languages.go.treesitter.gomodPackage`.
@@ -70,7 +68,7 @@
   following:
 
   ```shell
-  (class: "nixos") cannot be imported into a module 
+  (class: "nixos") cannot be imported into a module
   evaluation that expects class "darwin".
   ```
 
@@ -165,7 +163,9 @@
       - Mappings are now expected to be set using the built-in Neovim APIs,
         managed by `vim.keymaps` in nvf, instead of `mappings` options.
       - Some option defaults have changed.
+
     - And more.
+
   - Automatically configure an enabled picker in the order mentioned above, if
     any are enabled.
   - Add integration with `snacks.image` for rendering workspace/vault assets.
@@ -318,4 +318,8 @@ https://github.com/gorbit99/codewindow.nvim
 
 - Fix `vim.formatter.conform-nvim.setupOpts.formatters` type for correct merging
 
+[tlvince](https://github.com/tlvince):
+
+- Added configuration option for `foldenable`
+
 <!-- vim: set textwidth=80: -->

modules/plugins/treesitter/config.nix

@@ -6,6 +6,7 @@
   inherit (lib.modules) mkIf;
   inherit (lib.lists) optionals;
   inherit (lib.nvim.dag) entryAfter;
+  inherit (lib.trivial) boolToString;
 
   cfg = config.vim.treesitter;
 in {
@@ -54,10 +55,7 @@ in {
             callback = function()
               vim.wo[0][0].foldmethod = "expr"
               vim.wo[0][0].foldexpr = "v:lua.vim.treesitter.foldexpr()"
-              -- This is optional, but is set rather as a sane default.
-              -- If unset, opened files will be folded by automatically as
-              -- the files are opened
-              vim.o.foldenable = false
+              vim.o.foldenable = ${boolToString cfg.foldByDefault}
             end,
           })
         ''}

modules/plugins/treesitter/treesitter.nix

@@ -10,6 +10,7 @@ in {
     enable = mkEnableOption "treesitter, also enabled automatically through language options";
 
     fold = mkEnableOption "fold with treesitter";
+    foldByDefault = mkEnableOption "folding by default when a file is opened";
     autotagHtml = mkEnableOption "autoclose and rename html tag";
 
     grammars = mkOption {