add update_chunk for runner

lua/go/gotestsum.lua

@@ -17,9 +17,21 @@ function M.watch(args)
     update_buffer = true,
     on_exit = function()
       vim.schedule(function()
-        utils.restart()
+        vim.notify('watch stopped')
       end)
     end,
+    on_chunk = function(err, lines)
+      if err then return end
+      for _, line in ipairs(lines) do
+        if line:match('Errors') then
+          vim.notify(vfn.join(lines, ', ' ), vim.lsp.log_levels.ERROR)
+          return
+        elseif line:match('PASS') or line:match('DONE') then
+          vim.notify(line, vim.lsp.log_levels.INFO)
+        end
+      end
+
+    end
   }
   runner.run(cmd, opts)
   return cmd, opts

lua/go/runner.lua

@@ -40,8 +40,9 @@ local run = function(cmd, opts)
         vim.notify('error ' .. tostring(err) .. vim.inspect(chunk or ''), vim.lsp.log_levels.WARN)
       end)
     end
+
+    local lines = {}
     if chunk then
-      local lines = {}
       for s in chunk:gmatch('[^\r\n]+') do
         table.insert(lines, s)
       end
@@ -61,9 +62,19 @@ local run = function(cmd, opts)
         vim.fn.setloclist(0, {}, ' ', locopts)
       end)
     end
+    return lines
+  end
+  local update_chunk = function(err, chunk)
+    local lines
+    if opts.update_chunk then
+      lines = opts.update_chunk(err, chunk)
+    else
+      lines = update_chunk_fn(err, chunk)
+    end
+    if opts.on_chunk and lines then
+      opts.on_chunk(err, lines)
+    end
   end
-  local update_chunk = opts.update_chunk or update_chunk_fn
-
   log('job:', cmd, job_options)
   handle, _ = uv.spawn(
     cmd,