Add js.Batch

Fixes #12626
Closes #7499
Closes #9978
Closes #12879
Closes #13113
Fixes #13116

common/herrors/errors.go

@@ -133,6 +133,21 @@ func IsNotExist(err error) bool {
 	return false
 }
 
+// IsExist returns true if the error is a file exists error.
+// Unlike os.IsExist, this also considers wrapped errors.
+func IsExist(err error) bool {
+	if os.IsExist(err) {
+		return true
+	}
+
+	// os.IsExist does not consider wrapped errors.
+	if os.IsExist(errors.Unwrap(err)) {
+		return true
+	}
+
+	return false
+}
+
 var nilPointerErrRe = regexp.MustCompile(`at <(.*)>: error calling (.*?): runtime error: invalid memory address or nil pointer dereference`)
 
 const deferredPrefix = "__hdeferred/"

common/herrors/file_error.go

@@ -384,7 +384,7 @@ func extractPosition(e error) (pos text.Position) {
 	case godartsass.SassError:
 		span := v.Span
 		start := span.Start
-		filename, _ := paths.UrlToFilename(span.Url)
+		filename, _ := paths.UrlStringToFilename(span.Url)
 		pos.Filename = filename
 		pos.Offset = start.Offset
 		pos.ColumnNumber = start.Column