Allow filenames to be read from stdin when using -L

Author: lukaslueg

main.go

@@ -48,17 +48,25 @@ func getFileNames() ([]string, error) {
 		return names, nil
 	}
 
-	in, err := os.Open(inputFile)
-	if err != nil {
-		return nil, err
-	}
+	var scanner *bufio.Scanner
+	if inputFile != "-" {
+		in, err := os.Open(inputFile)
+		if err != nil {
+			return nil, err
+		}
 
-	defer in.Close()
+		defer in.Close()
+		scanner = bufio.NewScanner(in)
+	} else {
+		scanner = bufio.NewScanner(os.Stdin)
+	}
 
-	scanner := bufio.NewScanner(in)
 	for scanner.Scan() {
 		names = append(names, scanner.Text())
 	}
+	if err := scanner.Err(); err != nil {
+		return nil, err
+	}
 
 	return names, nil
 }