- let input = read_to_string(&input_file_name)?;
- let input_file_name = input_file_name.to_string_lossy();
- let output = sack(&input, Some(&input_file_name), endian)?;
- std::fs::write(&output_file_name, &output)?;
+
+ let input_file_str = input_file_name.to_string_lossy();
+ let input = read_to_string(&input_file_name)
+ .map_err(|err| anyhow!("{input_file_str}: read failed ({err})"))?;
+
+ let output = sack(&input, Some(&input_file_str), endian)?;
+
+ let output_file_str = output_file_name.to_string_lossy();
+ std::fs::write(&output_file_name, &output)
+ .map_err(|err| anyhow!("{output_file_str}: write failed ({err})"))?;
+