Use file extension to auto detect output format!

pkg/yqlib/decoder.go

@@ -43,17 +43,18 @@ func InputFormatFromString(format string) (InputFormat, error) {
 	}
 }
 
-func InputFormatFromFilename(filename string, defaultFormat string) string {
+func FormatFromFilename(filename string) string {
+
 	if filename != "" {
-		GetLogger().Debugf("checking filename '%s' for inputFormat", filename)
+		GetLogger().Debugf("checking file extension '%s' for auto format detection", filename)
 		nPos := strings.LastIndex(filename, ".")
 		if nPos > -1 {
-			inputFormat := filename[nPos+1:]
-			GetLogger().Debugf("detected inputFormat '%s'", inputFormat)
-			return inputFormat
+			format := filename[nPos+1:]
+			GetLogger().Debugf("detected format '%s'", format)
+			return format
 		}
 	}
 
-	GetLogger().Debugf("using default inputFormat '%s'", defaultFormat)
-	return defaultFormat
+	GetLogger().Debugf("using default inputFormat 'yaml'")
+	return "yaml"
 }

pkg/yqlib/printer.go

@@ -33,11 +33,11 @@ const (
 
 func OutputFormatFromString(format string) (PrinterOutputFormat, error) {
 	switch format {
-	case "yaml", "y":
+	case "yaml", "y", "yml":
 		return YamlOutputFormat, nil
 	case "json", "j":
 		return JSONOutputFormat, nil
-	case "props", "p":
+	case "props", "p", "properties":
 		return PropsOutputFormat, nil
 	case "csv", "c":
 		return CSVOutputFormat, nil