neovim-flake/modules/plugins/treesitter/config.nix

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{
config,
pkgs,
lib,
...
}: let
inherit (lib.modules) mkIf mkMerge;
inherit (lib.lists) optional;
inherit (lib.nvim.binds) mkSetBinding addDescriptionsToMappings;
inherit (lib.nvim.dag) entryBefore entryAnywhere;
cfg = config.vim.treesitter;
usingNvimCmp = config.vim.autocomplete.enable && config.vim.autocomplete.type == "nvim-cmp";
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self = import ./treesitter.nix {inherit pkgs lib;};
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mappingDefinitions = self.options.vim.treesitter.mappings;
mappings = addDescriptionsToMappings cfg.mappings mappingDefinitions;
in {
config = mkIf cfg.enable {
vim = {
startPlugins = ["nvim-treesitter"] ++ optional usingNvimCmp "cmp-treesitter";
autocomplete.sources = {"treesitter" = "[Treesitter]";};
maps = {
# HACK: Using mkSetLuaBinding and putting the lua code does not work for some reason: It just selects the whole file.
# This works though, and if it ain't broke, don't fix it.
normal = mkSetBinding mappings.incrementalSelection.init ":lua require('nvim-treesitter.incremental_selection').init_selection()<CR>";
visualOnly = mkMerge [
(mkSetBinding mappings.incrementalSelection.incrementByNode ":lua require('nvim-treesitter.incremental_selection').node_incremental()<CR>")
(mkSetBinding mappings.incrementalSelection.incrementByScope ":lua require('nvim-treesitter.incremental_selection').scope_incremental()<CR>")
(mkSetBinding mappings.incrementalSelection.decrementByNode ":lua require('nvim-treesitter.incremental_selection').node_decremental()<CR>")
];
};
# For some reason treesitter highlighting does not work on start if this is set before syntax on
configRC.treesitter-fold = mkIf cfg.fold (entryBefore ["basic"] ''
set foldmethod=expr
set foldexpr=nvim_treesitter#foldexpr()
set nofoldenable
'');
luaConfigRC.treesitter = entryAnywhere ''
require'nvim-treesitter.configs'.setup {
-- Disable imperative treesitter options that would attempt to fetch
-- grammars into the read-only Nix store. To add additional grammars here
-- you must use the `config.vim.treesitter.grammars` option.
auto_install = false,
sync_install = false,
ensure_installed = {},
highlight = {
enable = true,
disable = {},
},
incremental_selection = {
enable = true,
keymaps = {
init_selection = false,
node_incremental = false,
scope_incremental = false,
node_decremental = false,
},
},
}
'';
};
};
}