r001 / tree-sitter-leo

Language parser for aleo.org Leo language.

WARNING

This branch is a full, incompatible, rewrite of nvim-treesitter and work in progress. This branch REQUIRES (the latest commit on) Neovim master.

The nvim-treesitter plugin provides

1. functions for installing, updating, and removing tree-sitter parsers;
2. a collection of queries for enabling tree-sitter features built into Neovim for these languages.

Quickstart

Requirements

• Neovim 0.10.0 or later (nightly)
• tar and curl in your path (or alternatively git)
• a C compiler in your path and libstdc++ installed (Windows users please read this!)
• optional: tree-sitter CLI and node

Installation

You can install nvim-treesitter with your favorite package manager (or using the native package feature of vim, see :h packages).

NOTE: This plugin is only guaranteed to work with specific versions of language parsers (as specified in the lockfile.json). When upgrading the plugin, you must make sure that all installed parsers are updated to the latest version via :TSUpdate. It is strongly recommended to automate this; e.g., using lazy.nvim

require('lazy').setup(
  { 'nvim-treesitter/nvim-treesitter', build = ':TSUpdate', lazy = false }
)

NOTE: This plugin does not support lazy-loading.

Setup

nvim-treesitter can be configured by calling setup. The following snippet lists the available options and their default values. You do not need to call setup for nvim-treesitter to work using default values.

require'nvim-treesitter'.setup {
  -- A list of parser names or tiers ('stable', 'core', 'community', 'unsupported')
  ensure_install = { },

  -- List of parsers to ignore installing
  ignore_install = { 'unsupported' },

  -- Automatically install missing parsers when entering buffer
  auto_install = false,

  -- Directory to install parsers and queries to
  install_dir = vim.fn.stdpath('data') .. '/site'
}

Check :h nvim-treesitter-commands for a list of all available commands.

Supported languages

For nvim-treesitter to support a specific feature for a specific language requires both a parser for that language and an appropriate language-specific query file for that feature.

A list of the currently supported languages can be found on this page.

We are looking for maintainers to add more parsers and to write query files for their languages. Check our tracking issue for open language requests.

For related information on the supported languages, including related plugins, see this wiki page.

Supported features

nvim-treesitter provides queries for the following features. These are not automatically enabled.

Highlighting

Treesitter highlighting is provided by Neovim, see :h treesitter-highlight. To enable it for a filetype, put vim.treesitter.start() in a ftplugin/<filetype>.lua in your config directory, or place the following in your init.lua:

vim.api.nvim_create_autocmd('FileType', {
  pattern = { '<filetype>' },
  callback = function() vim.treesitter.start() end,
})

Folds

Treesitter-based folding is provided by Neovim. To enable it, put the following in your ftplugin or FileType autocommand:

vim.wo.foldexpr = 'v:lua.vim.treesitter.foldexpr()'

Indentation

Treesitter-based indentation is provided by this plugin but considered experimental. To enable it, put the following in your ftplugin or FileType autocommand:

vim.bo.indentexpr = "v:lua.require'nvim-treesitter'.indentexpr()"

(Note the specific quotes used.)

Injections

Injections are used for multi-language documents, see :h treesitter-language-injections. No setup is needed.

Locals

These queries can be used to look up definitions and references to identifiers in a given scope. They are used, e.g., by the nvim-treesitter-refactor plugin.

Advanced setup

Adding parsers

If you have a parser that is not on the list of supported languages (either as a repository on Github or in a local directory), you can add it manually for use by nvim-treesitter as follows:

1. Clone the repository or create a new project in, say, ~/projects/tree-sitter-zimbu. Make sure that the tree-sitter-cli executable is installed and in your path; see https://tree-sitter.github.io/tree-sitter/creating-parsers#installation for installation instructions.
2. Run tree-sitter generate in this directory (followed by tree-sitter test for good measure).
3. Add the following snippet to your init.lua:

local parser_config = require('nvim-treesitter.parsers').configs
parser_config.zimbu = {
  install_info = {
    url = '~/projects/tree-sitter-zimbu', -- local path or git repo
    files = { 'src/parser.c' }, -- note that some parsers also require src/scanner.c or src/scanner.cc
    -- optional entries:
    branch = 'develop', -- only needed if different from default branch
    location= 'parser', -- only needed if the parser is in subdirectory of a "monorepo"
    requires_generate_from_grammar = true, -- only needed if repo does not contain pre-generated src/parser.c
    generate_requires_npm = true, -- only needed if parser has npm dependencies
  },
}

If you use a git repository for your parser and want to use a specific version, you can set the revision key in the install_info table for you parser config.

4. If the parser name differs from the filetype(s) used by Neovim, you need to register the parser via

vim.treesitter.language.register('zimbu', { 'zu' })

If Neovim does not detect your language's filetype by default, you can use Neovim's vim.filetype.add() to add a custom detection rule.

5. Start nvim and :TSInstall zimbu.

You can also skip step 2 and use :TSInstallFromGrammar zimbu to install directly from a grammar.js in the top-level directory specified by url. Once the parser is installed, you can update it (from the latest revision of the main branch if url is a Github repository) with :TSUpdate zimbu.

Note: Parsers using external scanner in C++ need to target C++11 or earlier. Newer versions are not supported.

Adding queries

Queries can be placed anywhere in your runtimepath under queries/<language>, with earlier directories taking precedence unless the queries are marked with ; extends; see :h treesitter-query.

E.g., to add queries for zimbu, put highlights.scm etc. under

vim.fn.stdpath('data') .. 'site/queries/zimbu'

Troubleshooting

Before doing anything, make sure you have the latest version of this plugin and run :checkhealth nvim-treesitter. It can also help to update the parsers via :TSUpdate.

Feature {X} does not work for {language}...

1. Check the nvim-treesitter section of :checkhealth for any warning, and make sure that the query for {X} is listed for {language}.

2. Ensure that the feature is enabled as explained above.

3. Ensure Neovim is correctly identifying your language's filetype using the :echo &filetype command while one of your language's files is open in Neovim.

I get Error detected while processing .../plugin/nvim-treesitter.vim every time I open Neovim

This is probably due to a change in a parser's grammar or its queries. Try updating the parser that you suspect has changed (:TSUpdate {language}) or all of them (:TSUpdate). If the error persists after updating all parsers, please open an issue.

I get query error: invalid node type at position

This could be due a query file outside this plugin using outdated nodes, or due to an outdated parser.

• Make sure you have the parsers up to date with :TSUpdate
• Make sure you don't have more than one parser runtime directory. You can execute this command := vim.api.nvim_get_runtime_file('parser', true) to find all runtime directories. If you get more than one path, remove the ones that are outside this plugin (nvim-treesitter directory), so the correct version of the parser is used.

I want to use Git instead of curl for downloading the parsers

In your Lua config:

require("nvim-treesitter.install").prefer_git = true

I want to use a HTTP proxy for downloading the parsers

You can either configure curl to use additional CLI arguments in your Lua config:

require("nvim-treesitter.install").command_extra_args = {
    curl = { "--proxy", "<proxy url>" },
}

or you can configure git via .gitconfig and use git instead of curl

require("nvim-treesitter.install").prefer_git = true

I want to use a mirror instead of "https://github.com/"

In your Lua config:

for _, config in pairs(require("nvim-treesitter.parsers").configs) do
  config.install_info.url = config.install_info.url:gsub("https://github.com/", "something else")
end

require'nvim-treesitter'.setup {
    --
    --
}