New way to config parser per filetype under main branch

[z3sh3]

Here is my lazy config:

  {
    'nvim-treesitter/nvim-treesitter',
    lazy = false,
    branch = "main",
    build = ":TSUpdate",
    opts = function ()
      local parser_installed = { "c", "cpp", "diff", "java", "javadoc", "kotlin", "groovy", "dockerfile", "go", "gomod", "gosum", "html", "css", "javascript", "svelte", "lua", "markdown", "markdown_inline", "comment", "python", "htmldjango", "rust", "sql", "typescript", "tsx", "yaml", "toml", "elixir", "bash", "http", "tmux", "xml", "fish", "awk", "jq", "json", "jsonc", "json5", "printf", "vim", "vimdoc", "query", "cmake", "csv", "dot", "func", "gotmpl", "graphql", "ini", "jsdoc", "luadoc", "make", "nginx", "regex", "requirements", "ssh_config", "strace", "styled", "templ", "todotxt", "vue", "xresources", "asm", "mermaid", }
      require("nvim-treesitter").install(parser_installed)
      local ft_list = {}
      local ft_set = {}
      for _, parser in ipairs(parser_installed) do
        local fts = vim.treesitter.language.get_filetypes(parser)
        for _, ft in ipairs(fts) do
          ft_set[ft] = true
        end
      end
      for filetype in pairs(ft_set) do
        table.insert(ft_list, filetype)
      end
      vim.api.nvim_create_autocmd("FileType", {
        pattern = ft_list,
        callback = function()
          vim.treesitter.start()
          vim.wo.foldexpr = 'v:lua.vim.treesitter.foldexpr()'
          vim.bo.indentexpr = "v:lua.require'nvim-treesitter'.indentexpr()"
        end
      })
    end,
  },

there is a nvim built-in function: vim.treesitter.language.get_filetypes which get filetype names from parser name, nvim-treesitter report an error when filetype not supported if set autocmd pattern to *

I just share my config, new elegant solution is very much welcomed

btw, the startup message: [nvim-treesitter]: Installed 79/79 languages is annoying, Would be very appreciated if the install message can be turned off when nothing goes wrong.

Thanks for speed up my nvim startuptime!

[clason]

Would be very appreciated if the install message can be turned off when nothing goes wrong.

It cannot. Simply move the install to the build step; it's pointless to run this on every startup.

[nicolaskribas]

I would like to share the autocmd that I use to enable highlighting:

vim.api.nvim_create_autocmd("FileType", {
	group = init,
	callback = function(args)
		local filetype = args.match
		local lang = vim.treesitter.language.get_lang(filetype)
		if vim.treesitter.language.add(lang) then
			vim.treesitter.start()
		end
	end,
})

It uses vim.treesitter.language.add to check parser availability for every file you open.

[z3sh3]

that's neat, I just update my config:

  {
    'nvim-treesitter/nvim-treesitter',
    lazy = false,
    branch = "main",
    build = {
      function()
        local parser_installed = { "c", "cpp", "diff", "java", "javadoc", "kotlin", "groovy", "dockerfile", "go", "gomod", "gosum", "html", "css", "javascript", "svelte", "lua", "markdown", "markdown_inline", "comment", "python", "htmldjango", "rust", "sql", "typescript", "tsx", "yaml", "toml", "elixir", "bash", "http", "tmux", "xml", "fish", "awk", "jq", "json", "jsonc", "json5", "printf", "vim", "vimdoc", "query", "cmake", "csv", "dot", "func", "gotmpl", "graphql", "ini", "jsdoc", "luadoc", "make", "nginx", "regex", "requirements", "ssh_config", "strace", "styled", "templ", "todotxt", "vue", "xresources", "asm", "mermaid", }
        require("nvim-treesitter").install(parser_installed)
      end,
      ":TSUpdate",
    },
    init = function ()
      vim.api.nvim_create_autocmd("FileType", {
        callback = function(args)
          local filetype = args.match
          local lang = vim.treesitter.language.get_lang(filetype)
          if vim.treesitter.language.add(lang) then
            vim.wo.foldexpr = 'v:lua.vim.treesitter.foldexpr()'
            vim.bo.indentexpr = "v:lua.require'nvim-treesitter'.indentexpr()"
            vim.treesitter.start()
          end
        end
      })
    end,
  }

[clason]

Could probably be

build = function()
  local parser_installed = { ... }
  require("nvim-treesitter").install(parser_installed)
  require("nvim-treesitter").update()      
end

(not tested!)

[z3sh3]

just tested, even better!

[clason]

Just to have this in one place: if you're missing the autoinstall feature (and don't want to migrate to https://github.com/lewis6991/ts-install.nvim), you can use

  {
    'nvim-treesitter/nvim-treesitter',
    lazy = false,
    branch = "main",
    build = { ":TSUpdate" },
    init = function ()
      vim.api.nvim_create_autocmd("FileType", {
        callback = function(args)
          local filetype = args.match
          local lang = vim.treesitter.language.get_lang(filetype)
          require("nvim-treesitter").install(lang):await(function()
            vim.wo.foldexpr = 'v:lua.vim.treesitter.foldexpr()'
            vim.bo.indentexpr = "v:lua.require'nvim-treesitter'.indentexpr()"
            vim.treesitter.start()
          end)
        end
      })
    end,
  }

(again, not tested)

[mvllow]

Should parser_installed be lang?

- require("nvim-treesitter").install(parser_installed):await(function()
+ require("nvim-treesitter").install(lang):await(function()

This works but does cause issues for unknown filetypes, e.g. "minipick"

[clason]

Yes, sorry.

This works but does cause issues for unknown filetypes, e.g. "minipick"

What "issues"? You can gate this behind nvim-treesitter.config.get_available().

[mvllow]

Was specifically getting:

Error in FileType Autocommands for "*":
Lua callback: ...m/HEAD-40b64e9/share/nvim/runtime/lua/vim/treesitter.lua:431: Parser could not be created for buffer 2 and language "minipick"

Your suggestion circumvents that, though (thank you!). Full working autocmd for others:

vim.api.nvim_create_autocmd("FileType", {
	callback = function(args)
		local filetype = args.match
		local lang = vim.treesitter.language.get_lang(filetype)
		if vim.tbl_contains(require("nvim-treesitter.config").get_available(), lang) then
			require("nvim-treesitter").install(lang):await(function()
				vim.wo.foldexpr = "v:lua.vim.treesitter.foldexpr()"
				vim.bo.indentexpr = "v:lua.require'nvim-treesitter'.indentexpr()"
				vim.treesitter.start()
			end)
		end
	end
})

[wenjinnn]

Another snippet with auto install feature and mini.deps:

  local add, now, later = MiniDeps.add, MiniDeps.now, MiniDeps.later
  local parser_installed = { ... }
  local install_ts_langs = function() require('nvim-treesitter').install(parser_installed) end
  add({
    source = 'nvim-treesitter/nvim-treesitter',
    checkout = 'main',
    hooks = {
      post_install = function() later(install_ts_langs) end,
      post_checkout = function() vim.cmd('TSUpdate') end,
    },
  })
  local start_ts = function(lang)
    if not vim.tbl_contains(require('nvim-treesitter.config').get_available(), lang) then return end
    vim.wo.foldexpr = 'v:lua.vim.treesitter.foldexpr()'
    vim.bo.indentexpr = "v:lua.require'nvim-treesitter'.indentexpr()"
    vim.treesitter.start()
  end
  vim.api.nvim_create_autocmd('FileType', {
    pattern = '*',
    callback = function(event)
      local filetype = event.match
      local lang = vim.treesitter.language.get_lang(filetype)
      if not vim.tbl_contains(parser_installed, lang) then
        require('nvim-treesitter').install(lang):await(function() start_ts(lang) end)
      else
        start_ts(lang)
      end
    end,
  })

[luisdavim]

This is what I'm using: https://github.com/luisdavim/dotfiles/blob/master/files%2Fconfig%2Fnvim%2Finit.lua#L141