Support skipping textDocument/formatting with requireMarker too

Closes #213.

Author: fsouza

langserver/handle_text_document_formatting.go

@@ -62,6 +62,9 @@ func (h *langHandler) formatting(uri DocumentURI, options FormattingOptions) ([]
 	if cfgs, ok := h.configs[f.LanguageID]; ok {
 		for _, cfg := range cfgs {
 			if cfg.FormatCommand != "" {
+				if dir := matchRootPath(fname, cfg.RootMarkers); dir == "" && cfg.RequireMarker {
+					continue
+				}
 				configs = append(configs, cfg)
 			}
 		}

langserver/handle_text_document_formatting_test.go

@@ -0,0 +1,44 @@
+package langserver
+
+import (
+	"log"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestFormattingRequireRootMatcher(t *testing.T) {
+	base, _ := os.Getwd()
+	file := filepath.Join(base, "foo")
+	uri := toURI(file)
+
+	h := &langHandler{
+		logger:   log.New(log.Writer(), "", log.LstdFlags),
+		rootPath: base,
+		configs: map[string][]Language{
+			"vim": {
+				{
+					LintCommand:        `echo ` + file + `:2:No it is normal!`,
+					LintIgnoreExitCode: true,
+					LintStdin:          true,
+					RequireMarker:      true,
+					RootMarkers:        []string{".vimlintrc"},
+				},
+			},
+		},
+		files: map[DocumentURI]*File{
+			uri: {
+				LanguageID: "vim",
+				Text:       "scriptencoding utf-8\nabnormal!\n",
+			},
+		},
+	}
+
+	d, err := h.formatRequest(uri, FormattingOptions{})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(d) != 0 {
+		t.Fatal("text edits should be zero as we have no root marker for the language but require one", d)
+	}
+}