2 files changed, 41 insertions, 3 deletions
diff --git a/lua/lspconfig/configs.lua b/lua/lspconfig/configs.lua
index f69e2673..64d848c5 100644
--- a/lua/lspconfig/configs.lua
+++ b/lua/lspconfig/configs.lua
@@ -33,7 +33,7 @@ function configs.__newindex(t, config_name, config_def)
   function M.setup(config)
     validate {
       cmd = { config.cmd, 't', true },
-      root_dir = { config.root_dir, 'f', default_config.root_dir ~= nil },
+      root_dir = { config.root_dir, 'f', true },
       filetypes = { config.filetype, 't', true },
       on_new_config = { config.on_new_config, 'f', true },
       on_attach = { config.on_attach, 'f', true },
@@ -77,7 +77,11 @@ function configs.__newindex(t, config_name, config_def)
     local get_root_dir = config.root_dir
 
     function M.launch()
-      local root_dir = get_root_dir(api.nvim_buf_get_name(0), api.nvim_get_current_buf())
+      local root_dir
+      if get_root_dir then
+        root_dir = get_root_dir(api.nvim_buf_get_name(0), api.nvim_get_current_buf())
+      end
+
       if root_dir then
         api.nvim_command(
           string.format(
@@ -195,7 +199,11 @@ function configs.__newindex(t, config_name, config_def)
       end
 
       local id
-      local root_dir = get_root_dir(api.nvim_buf_get_name(bufnr), bufnr)
+      local root_dir
+
+      if get_root_dir then
+        root_dir = get_root_dir(api.nvim_buf_get_name(bufnr), bufnr)
+      end
 
       if root_dir then
         id = manager.add(root_dir, false)
diff --git a/lua/lspconfig/sixtyfps.lua b/lua/lspconfig/sixtyfps.lua
new file mode 100644
index 00000000..1ebc8774
--- /dev/null
+++ b/lua/lspconfig/sixtyfps.lua
@@ -0,0 +1,30 @@
+local configs = require 'lspconfig/configs'
+
+configs.sixtyfps = {
+  default_config = {
+    cmd = { 'sixtyfps-lsp' },
+    filetypes = { 'sixtyfps' },
+    single_file_support = true,
+  },
+  docs = {
+    description = [=[
+https://github.com/sixtyfpsui/sixtyfps
+`SixtyFPS`'s language server
+
+You can build and install `sixtyfps-lsp` binary with `cargo`:
+```sh
+cargo install sixtyfps-lsp
+```
+
+Vim does not have built-in syntax for the `sixtyfps` filetype currently.
+
+This can be added via an autocmd:
+
+```lua
+vim.cmd [[ autocmd BufRead,BufNewFile *.60 set filetype=sixtyfps ]]
+```
+
+or by installing a filetype plugin such as https://github.com/RustemB/sixtyfps-vim
+]=],
+  },
+}