nvim/lua/plugins/treesitter.lua

return {
    "nvim-treesitter/nvim-treesitter",
    version = false,
    build = ":TSUpdate",
    cmd = {"TSUpdate", "TSInstall"},
    event = { "BufReadPre", "BufNewFile" },
    dependencies = "nvim-treesitter/nvim-treesitter-refactor",
    config = function(_, opts)
        if type(opts.ensure_installed) == "table" then
            -- @type table<string, boolean>
            local added = {}
            opts.ensure_installed = vim.tbl_filter(function(lang)
                if added[lang] then return false end
                added[lang] = true
                return true
            end, opts.ensure_installed)
        end
        require("nvim-treesitter.configs").setup(opts)
    end,
    opts = {
        auto_install = vim.fn.executable "nix" == 1,
        highlight = {
            enable = true,
            disable = { "fortran" },
            additional_vim_regex_highlighting = false,
        },
        incremental_selection = {
            enable = true,
            keymaps = {
                init_selection = "gnn",
                node_incremental = "gnr",
                scope_incremental = "gnc",
                node_decremental = "gnm",
            },
        },
        indent = {
            enable = true,
        },
        refactor = {
            smart_rename = {
                enable = true,
                keymaps = {
                    smart_rename = "grr",
                },
            },
            navigation = {
                enable = true,
                keymaps = {
                    goto_definition_lsp_fallback = "gnd",
                },
            },
        },
    },
}