Can autocmds be placed inside config?

[kcaashish]

I am setting up nvim-metals in LazyVim, the configuration help provided is in packer, but I tried it with lazy.nvim. The problem if how the config is called.

  -- nvim-metals
  {
    "scalameta/nvim-metals",
    name = "metals",
    ft = { "scala", "sbt", "java" },
    dependencies = {
      "nvim-lua/plenary.nvim",
    },
    -- stylua: ignore
    keys = {
      { "<leader>cW", function () require('metals').hover_worksheet() end, desc = "Metals Worksheet" },
      { "<leader>cM", function () require('telescope').extensions.metals.commands() end, desc = "Telescope Metals Commands" },
    },
    config = function()
      local metals_config = require("metals").bare_config()

      metals_config.settings = {
        showImplicitArguments = true,
        showImplicitConversionsAndClasses = true,
        showInferredType = true,
        superMethodLensesEnabled = true,
      }
      metals_config.init_options.statusBarProvider = "on"
      metals_config.capabilities = require("cmp_nvim_lsp").default_capabilities()

      local nvim_metals_group = vim.api.nvim_create_augroup("nvim-metals", { clear = true })
      vim.api.nvim_create_autocmd("FileType", {
        pattern = { "scala", "sbt", "java" },
        callback = function()
          require("metals").initialize_or_attach(metals_config)
        end,
        group = nvim_metals_group,
      })
    end,
  }

Every time I open a scala file, the plugin loads, but the autocmd doesn't seem to get triggered right away, so I have to either open multiple files or wait for sometime for Metals to start working. Is there a better way to do this?

[mgierada]

Hi @kcaashish I have stumbled into the same issue today. I even used exactly the same config as the one you paste here. The quick solution for me was to make sure all my related config is up-to-date. I am running:

• nvim v0.9.0,
• mvim-metals 0a83e0b,
• AstroNvim v3.13.2
• MacOS Ventura

metals lazy loads instantly upon opening any scala, sbt or java file.

Let us know whether that works for you as well.

[IndianBoy42]

You could put the autocmds into the init = function which runs before loading (at neovims startup)

The trouble is with adding a filetype autocmd (the one you define in config) from within a filetype autocmd handler (the one lazy defined to load the plugin). Whether that's guaranteed to work or not I'm not sure

[kcaashish]

This seems to be working for me. Thank you!

[dhia-gharsallaoui]

@kcaashish Can you share the new working configuration, please?

[kcaashish]

@dhia-gharsallaoui Here is my full config for scala, along with lualine component:

return {
  -- add treesitter support for scala
  {
    "nvim-treesitter/nvim-treesitter",
    opts = function(_, opts)
      vim.list_extend(opts.ensure_installed, { "scala", "java" })
    end,
  },
  -- lualine component for metals
  {
    "nvim-lualine/lualine.nvim",
    event = "VeryLazy",
    opts = function(_, opts)
      table.insert(opts.sections.lualine_x, 2, {
        function()
          local status = vim.g["metals_status"]
          if status == nil then
            return ""
          end
          return status
        end,
        color = function()
          return require("lazyvim.util").fg("DiagnosticWarn")
        end,
      })
    end,
  },
  -- nvim-metals
  {
    "scalameta/nvim-metals",
    ft = { "scala", "sbt" },
    dependencies = {
      "nvim-lua/plenary.nvim",
    },
    -- stylua: ignore
    keys = {
      { "<leader>cW", function () require('metals').hover_worksheet() end, desc = "Metals Worksheet" },
      { "<leader>cM", function () require('telescope').extensions.metals.commands() end, desc = "Telescope Metals Commands" },
    },
    init = function()
      local metals_config = require("metals").bare_config()

      metals_config.settings = {
        showImplicitArguments = true,
        showImplicitConversionsAndClasses = true,
        showInferredType = true,
        superMethodLensesEnabled = true,
      }
      metals_config.init_options.statusBarProvider = "on"
      metals_config.capabilities = require("cmp_nvim_lsp").default_capabilities()

      local nvim_metals_group = vim.api.nvim_create_augroup("nvim-metals", { clear = true })
      vim.api.nvim_create_autocmd("FileType", {
        pattern = { "scala", "sbt" },
        callback = function()
          require("metals").initialize_or_attach(metals_config)
        end,
        group = nvim_metals_group,
      })
    end,
  },
}

[dhia-gharsallaoui]

Thank you, mate 👍

[arikapt]

I copy paste exactly your config but I can't use any lsp functions, did you do another thing ?