Haskell

info

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

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 = { ensure_installed = { "haskell" } }

Full Spec

{
  "nvim-treesitter/nvim-treesitter",
  opts = { ensure_installed = { "haskell" } },
}

haskell-tools.nvim

Options

opts = nil

Full Spec

{
  "mrcjkb/haskell-tools.nvim",
  version = false,
  ft = { "haskell", "lhaskell", "cabal", "cabalproject" },
  keys = {
    {
      "<localleader>e",
      "<cmd>HlsEvalAll<cr>",
      ft = "haskell",
      desc = "Evaluate All",
    },
    {
      "<localleader>h",
      function()
        require("haskell-tools").hoogle.hoogle_signature()
      end,
      ft = "haskell",
      desc = "Hoogle Signature",
    },
    {
      "<localleader>r",
      function()
        require("haskell-tools").repl.toggle()
      end,
      ft = "haskell",
      desc = "REPL (Package)",
    },
    {
      "<localleader>R",
      function()
        require("haskell-tools").repl.toggle(vim.api.nvim_buf_get_name(0))
      end,
      ft = "haskell",
      desc = "REPL (Buffer)",
    },
  },
}

mason.nvim

Options

opts = { ensure_installed = { "haskell-language-server" } }

Full Spec

{
  "mason-org/mason.nvim",
  opts = { ensure_installed = { "haskell-language-server" } },
}

mason.nvim

Options

opts = { ensure_installed = { "haskell-debug-adapter" } }

Full Spec

{
  "mason-org/mason.nvim",
  opts = { ensure_installed = { "haskell-debug-adapter" } },
}

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 = function()
  LazyVim.on_load("telescope.nvim", function()
    require("telescope").load_extension("ht")
  end)
end

Full Spec

{
  "luc-tielen/telescope_hoogle",
  ft = { "haskell", "lhaskell", "cabal", "cabalproject" },
  opts = function()
    LazyVim.on_load("telescope.nvim", function()
      require("telescope").load_extension("ht")
    end)
  end,
  keys = {
    {
      "<localleader>H",
      "<cmd>Telescope hoogle<cr>",
      ft = "haskell",
      desc = "Hoogle",
    },
  },
}

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,
    },
  },
}

nvim-dap (optional)

Options

opts = nil

Full Spec

{
  "mfussenegger/nvim-dap",
  optional = true,
  dependencies = {
    {
      "mason-org/mason.nvim",
      opts = { ensure_installed = { "haskell-debug-adapter" } },
    },
  },
}

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",
  optional = true,
  specs = {
    {
      "luc-tielen/telescope_hoogle",
      ft = { "haskell", "lhaskell", "cabal", "cabalproject" },
      opts = function()
        LazyVim.on_load("telescope.nvim", function()
          require("telescope").load_extension("ht")
        end)
      end,
      keys = {
        {
          "<localleader>H",
          "<cmd>Telescope hoogle<cr>",
          ft = "haskell",
          desc = "Hoogle",
        },
      },
    },
  },
}

conform.nvim (optional)

Options

opts = {
  formatters_by_ft = {
    haskell = { "fourmolu" },
    cabal = { "cabal_fmt" },
  },
}

Full Spec

{
  "stevearc/conform.nvim",
  optional = true,
  opts = {
    formatters_by_ft = {
      haskell = { "fourmolu" },
      cabal = { "cabal_fmt" },
    },
  },
}

nvim-lint (optional)

Options

opts = {
  linters_by_ft = {
    haskell = { "hlint" },
  },
}

Full Spec

{
  "mfussenegger/nvim-lint",
  optional = true,
  opts = {
    linters_by_ft = {
      haskell = { "hlint" },
    },
  },
}