more language reformat (#949)

lua/lang/yaml.lua

@@ -1,8 +1,19 @@
 local M = {}
 
 M.config = function()
-  -- TODO: implement config for language
-  return "No config available!"
+  O.formatters.filetype["yaml"] = {
+    function()
+      return {
+        exe = O.lang.yaml.formatter.exe,
+        args = O.lang.yaml.formatter.args,
+        stdin = not (O.lang.yaml.formatter.stdin ~= nil),
+      }
+    end,
+  }
+  require("formatter.config").set_defaults {
+    logging = false,
+    filetype = O.formatters.filetype,
+  }
 end
 
 M.format = function()
@@ -15,7 +26,17 @@ M.lint = function()
   return "No linters configured!"
 end
 
-M.lsp = function() end
+M.lsp = function()
+  if require("lv-utils").check_lsp_client_active "yamlls" then
+    return
+  end
+
+  -- npm install -g yaml-language-server
+  require("lspconfig").yamlls.setup {
+    cmd = { DATA_PATH .. "/lspinstall/yaml/node_modules/.bin/yaml-language-server", "--stdio" },
+    on_attach = require("lsp").common_on_attach,
+  }
+end
 
 M.dap = function()
   -- TODO: implement dap