Haskell

info

You can enable the extra with the :LazyExtras command. Plugins marked as optional will only be configured if they are installed.

Alternatively, you can add it to your lazy.nvim imports

lua/config/lazy.lua

require("lazy").setup({
  spec = {
    { "LazyVim/LazyVim", import = "lazyvim.plugins" },
    { import = "lazyvim.plugins.extras.lang.haskell" },
    { import = "plugins" },
  },
})

Below you can find a list of included plugins and their default settings.

caution

You don't need to copy the default settings to your config. They are only shown here for reference.

nvim-treesitter

Add Haskell to treesitter

Options

opts = function(_, opts)
  if type(opts.ensure_installed) == "table" then
    vim.list_extend(opts.ensure_installed, { "haskell" })
  end
end

Full Spec

{
  "nvim-treesitter/nvim-treesitter",
  opts = function(_, opts)
    if type(opts.ensure_installed) == "table" then
      vim.list_extend(opts.ensure_installed, { "haskell" })
    end
  end,
}

haskell-tools.nvim

Options

opts = {}

Full Spec

{
  "mrcjkb/haskell-tools.nvim",
  version = "^3",
  ft = { "haskell", "lhaskell", "cabal", "cabalproject" },
  dependencies = {
    { "nvim-telescope/telescope.nvim", optional = true },
  },
  config = function()
    local ok, telescope = pcall(require, "telescope")
    if ok then
      telescope.load_extension("ht")
    end
  end,
}

mason.nvim

Options

opts = function(_, opts)
  opts.ensure_installed = opts.ensure_installed or {}
  vim.list_extend(opts.ensure_installed, { "haskell-language-server" })
end

Full Spec

{
  "williamboman/mason.nvim",
  opts = function(_, opts)
    opts.ensure_installed = opts.ensure_installed or {}
    vim.list_extend(opts.ensure_installed, { "haskell-language-server" })
  end,
}

mason.nvim

Options

opts = function(_, opts)
  opts.ensure_installed = opts.ensure_installed or {}
  vim.list_extend(opts.ensure_installed, { "haskell-debug-adapter" })
end

Full Spec

{
  "williamboman/mason.nvim",
  opts = function(_, opts)
    opts.ensure_installed = opts.ensure_installed or {}
    vim.list_extend(opts.ensure_installed, { "haskell-debug-adapter" })
  end,
}

neotest-haskell

Options

opts = nil

Full Spec

{ "mrcjkb/neotest-haskell" }

haskell-snippets.nvim

Options

opts = {}

Full Spec

{
  "mrcjkb/haskell-snippets.nvim",
  dependencies = { "L3MON4D3/LuaSnip" },
  ft = { "haskell", "lhaskell", "cabal", "cabalproject" },
  config = function()
    local haskell_snippets = require("haskell-snippets").all
    require("luasnip").add_snippets("haskell", haskell_snippets, { key = "haskell" })
  end,
}

LuaSnip

Options

opts = nil

Full Spec

{ "L3MON4D3/LuaSnip" }

telescope_hoogle

Options

opts = {}

Full Spec

{
  "luc-tielen/telescope_hoogle",
  ft = { "haskell", "lhaskell", "cabal", "cabalproject" },
  dependencies = {
    { "nvim-telescope/telescope.nvim" },
  },
  config = function()
    local ok, telescope = pcall(require, "telescope")
    if ok then
      telescope.load_extension("hoogle")
    end
  end,
}

nvim-lspconfig

Make sure lspconfig doesn't start hls, as it conflicts with haskell-tools

Options

opts = {
  setup = {
    hls = function()
      return true
    end,
  },
}

Full Spec

{
  "neovim/nvim-lspconfig",
  opts = {
    setup = {
      hls = function()
        return true
      end,
    },
  },
}

telescope.nvim (optional)

Options

opts = nil

Full Spec

{ "nvim-telescope/telescope.nvim", optional = true }

nvim-dap (optional)

Options

opts = nil

Full Spec

{
  "mfussenegger/nvim-dap",
  optional = true,
  dependencies = {
    {
      "williamboman/mason.nvim",
      opts = function(_, opts)
        opts.ensure_installed = opts.ensure_installed or {}
        vim.list_extend(opts.ensure_installed, { "haskell-debug-adapter" })
      end,
    },
  },
}

neotest (optional)

Options

opts = {
  adapters = {
    ["neotest-haskell"] = {},
  },
}

Full Spec

{
  "nvim-neotest/neotest",
  optional = true,
  dependencies = {
    { "mrcjkb/neotest-haskell" },
  },
  opts = {
    adapters = {
      ["neotest-haskell"] = {},
    },
  },
}

telescope.nvim (optional)

Options

opts = nil

Full Spec

{ "nvim-telescope/telescope.nvim" }