{ config, pkgs, ... }:
{
  programs.neovim = {
    enable = true;
    defaultEditor = true;
    package = pkgs.neovim-unwrapped;
    extraPackages = with pkgs; [
      rust-analyzer
      nodePackages_latest.bash-language-server shellcheck
      nodePackages_latest.typescript-language-server
      nodePackages_latest.svelte-language-server
      clang-tools
      nodePackages_latest.vscode-langservers-extracted
      nil
      marksman
      taplo
      python3Packages.python-lsp-server
    ];
    # extraPython3Packages = pyPkgs: with pyPkgs; [ python-lsp-server ];
    extraConfig = '' 
      autocmd BufReadPost * if @% !~# '\.git[\/\\]COMMIT_EDITMSG$' && line("'\"") > 1 && line("'\"") <= line("$") | exe "normal! g`\"" | endif
      syntax on
      lua << EOF
      EOF
    '';
    viAlias = true;
    vimAlias = true;
    vimdiffAlias = true;
    plugins =
    let lua = (s: ''
        lua << EOF
        ${s}
        EOF
      '');
    in with pkgs.vimPlugins; [
      vim-svelte
      # TODO remove on next nvim update (0.8.3/0.9)
      vim-nix
      { plugin = nvim-web-devicons;
        config = lua ''
        require'nvim-web-devicons'.setup {
        }
        ''; }
      { plugin = nvim-tree-lua;
        config = lua ''
          vim.g.loaded_netrw = 1
          vim.g.loaded_netrwPlugin = 1
          vim.opt.termguicolors = true
          require("nvim-tree").setup({
            -- :help nvim-tree-setup
          })
        ''; }
      vim-sleuth
      luasnip
      { plugin = nvim-cmp;
        config = lua ''
              local cmp = require('cmp')
              cmp.setup {
                snippet = {
                  expand = function(args)
                    require('luasnip').lsp_expand(args.body)
                  end,
                },
                mapping = {
                  ['<C-p>'] = cmp.mapping.select_prev_item(),
                  ['<C-n>'] = cmp.mapping.select_next_item(),
                  ['<C-space>'] = cmp.mapping.complete(),
                  ['<C-e>'] = cmp.mapping.close(),
                  ['<tab>'] = cmp.mapping.confirm { select = true },
                },
                sources = cmp.config.sources({
                  { name = 'nvim_lsp' },
                  { name = 'luasnip' },
                }),
              }
        ''; }
      cmp_luasnip
      cmp-nvim-lsp
      { plugin = nvim-lspconfig;
        config = lua ''
          -- Mappings.
          -- See `:help vim.diagnostic.*` for documentation on any of the below functions
          local opts = { noremap=true, silent=true }
          vim.keymap.set('n', '<space>e', vim.diagnostic.open_float, opts)
          vim.keymap.set('n', '[d', vim.diagnostic.goto_prev, opts)
          vim.keymap.set('n', ']d', vim.diagnostic.goto_next, opts)
          vim.keymap.set('n', '<space>q', vim.diagnostic.setloclist, opts)

          -- Use an on_attach function to only map the following keys
          -- after the language server attaches to the current buffer
          local on_attach = function(client, bufnr)
            -- Enable completion triggered by <c-x><c-o>
            vim.api.nvim_buf_set_option(bufnr, 'omnifunc', 'v:lua.vim.lsp.omnifunc')

            -- Mappings.
            -- See `:help vim.lsp.*` for documentation on any of the below functions
            local bufopts = { noremap=true, silent=true, buffer=bufnr }
            vim.keymap.set('n', 'gD', vim.lsp.buf.declaration, bufopts)
            vim.keymap.set('n', 'gd', vim.lsp.buf.definition, bufopts)
            vim.keymap.set('n', 'K', vim.lsp.buf.hover, bufopts)
            vim.keymap.set('n', 'gi', vim.lsp.buf.implementation, bufopts)
            vim.keymap.set('n', '<C-k>', vim.lsp.buf.signature_help, bufopts)
            vim.keymap.set('n', '<space>wa', vim.lsp.buf.add_workspace_folder, bufopts)
            vim.keymap.set('n', '<space>wr', vim.lsp.buf.remove_workspace_folder, bufopts)
            vim.keymap.set('n', '<space>wl', function()
              print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
            end, bufopts)
            vim.keymap.set('n', '<space>D', vim.lsp.buf.type_definition, bufopts)
            vim.keymap.set('n', '<space>rn', vim.lsp.buf.rename, bufopts)
            vim.keymap.set('n', '<space>ca', vim.lsp.buf.code_action, bufopts)
            vim.keymap.set('n', 'gr', vim.lsp.buf.references, bufopts)
            vim.keymap.set('n', '<space>f', function() vim.lsp.buf.format { async = true } end, bufopts)
          end

          local lsp_flags = {
            -- This is the default in Nvim 0.7+
            debounce_text_changes = 150,
          }
          local capabilities = vim.tbl_extend(
            'keep',
            vim.lsp.protocol.make_client_capabilities(),
            require('cmp_nvim_lsp').default_capabilities()
          );
          -- see https://github.com/neovim/nvim-lspconfig/blob/master/doc/server_configurations.md
          require'lspconfig'.bashls.setup{
            on_attach = on_attach,
            flags = lsp_flags,
            capabilities = capabilities,
          }
          require'lspconfig'.clangd.setup{
            -- usually requires compile_flags.json
            on_attach = on_attach,
            flags = lsp_flags,
            capabilities = capabilities,
          }
          require'lspconfig'.pylsp.setup{
            -- https://github.com/python-lsp/python-lsp-server/blob/develop/CONFIGURATION.md
            on_attach = on_attach,
            flags = lsp_flags,
            capabilities = capabilities,
          }
          require'lspconfig'.svelte.setup{
            on_attach = on_attach,
            flags = lsp_flags,
            capabilities = capabilities,
          }
          require'lspconfig'.html.setup{
            on_attach = on_attach,
            flags = lsp_flags,
            capabilities = capabilities,
          }
          require'lspconfig'.cssls.setup{
            on_attach = on_attach,
            flags = lsp_flags,
            capabilities = capabilities,
          }
          require'lspconfig'.tsserver.setup{
            on_attach = on_attach,
            flags = lsp_flags,
            capabilities = capabilities,
          }
          require'lspconfig'.jsonls.setup{
            on_attach = on_attach,
            flags = lsp_flags,
            capabilities = capabilities,
          }
          require'lspconfig'.nil_ls.setup{
            on_attach = on_attach,
            flags = lsp_flags,
            capabilities = capabilities,
          }
          require'lspconfig'.taplo.setup{
            on_attach = on_attach,
            flags = lsp_flags,
            capabilities = capabilities,
          }
          require'lspconfig'.marksman.setup{
            on_attach = on_attach,
            flags = lsp_flags,
            capabilities = capabilities,
          }
          require'lspconfig'.rust_analyzer.setup{
            on_attach = on_attach,
            flags = lsp_flags,
            capabilities = capabilities,
            -- Server-specific settings...
            settings = {
              ["rust-analyzer"] = {}
            }
          }
        '';
      }
    ];
  };
}