LazyVim.LazyVim/lua/lazyvim/plugins/extras/lang/haskell.lua

return {

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

  {
    "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,
  },

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

  { 
    "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,
      },
    },
  },

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

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

  {
    "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,
  },

  -- Make sure lspconfig doesn't start hls,
  -- as it conflicts with haskell-tools
  {
    "neovim/nvim-lspconfig",
    opts = {
      setup = {
        hls = function()
          return true 
        end,
      },
    },
  },
}