Merge pull request #16 from erikzaadi/add-default-lsp-option

Optionally use lsp as default formatter

README.md

@@ -42,8 +42,10 @@ ft('typescript,javascript,typescriptreact'):fmt('prettier')
 
 -- call setup LAST
 require('guard').setup({
-    -- the only option for the setup function
+    -- the only options for the setup function
     fmt_on_save = true,
+    -- Use lsp if no formatter was defined for this filetype
+    lsp_as_default_formatter = false,
 })
 ```
 
@@ -90,7 +92,7 @@ Table format for custom tool:
 - `Pylint`
 - `rubocop`
 
-## Trobuleshooting
+## Troubleshooting
 
 if guard does not auto format on save, run `checkhealth` first.
 

doc/guard.nvim.txt

@@ -40,26 +40,29 @@ examples, more info below.
 
 >lua
     local ft = require('guard.filetype')
-    
+
     -- use clang-format and clang-tidy for c files
     ft('c'):fmt('clang-format')
            :lint('clang-tidy')
-    
+
     -- use stylua to format lua files and no linter
     ft('lua'):fmt('stylua')
-    
+
     -- use lsp to format first then use golines to format
     ft('go'):fmt('lsp')
             :append('golines')
             :lint('golangci')
-    
+
     -- multiple files register
     ft('typescript,javascript,typescriptreact'):fmt('prettier')
-
+
+
     -- call setup LAST
     require('guard').setup({
-        -- the only option for the setup function
-        fmt_on_save = true,
+        -- the only options for the setup function
+	fmt_on_save = true,
+	-- Use lsp if no formatter was defined for this filetype
+	lsp_as_default_formatter = false,
     })
 <
 
@@ -96,7 +99,7 @@ Table format for custom tool:
         timeout          --integer
         ignore_pattern   --table ignore run format when pattern match
         ignore_error     --when has lsp error ignore format
-    
+
         --special
         fn       --function if fn is set other field will not take effect
     }

lua/guard/init.lua

@@ -56,6 +56,7 @@ end
 local function setup(opt)
   opt = opt or {
     fmt_on_save = true,
+    lsp_as_default_formatter = false,
   }
 
   parse_setup_cfg(opt.ft)
@@ -65,6 +66,24 @@ local function setup(opt)
     register_event(fts)
   end
 
+  if opt.lsp_as_default_formatter then
+      vim.api.nvim_create_autocmd('LspAttach', {
+          callback = function(args)
+              local client = vim.lsp.get_client_by_id(args.data.client_id)
+              if not client:supports_method('textDocument/formatting') then
+                  return
+              end
+              local fthandler = require('guard.filetype')
+              local lsp = require('guard.tools.formatter').lsp
+              if fthandler[vim.bo[args.buf].filetype] and  fthandler[vim.bo[args.buf].filetype].fmt  then
+                  table.insert(fthandler[vim.bo[args.buf]], 1, lsp)
+              else
+                  fthandler(vim.bo[args.buf].filetype):fmt(lsp)
+              end
+          end
+      })
+  end
+
   local lint = require('guard.lint')
   for ft, conf in pairs(fts_config) do
     if conf.linter then