Let file format error message mention that upgrading to newer version

of measureme might help.

+ rustfmt

analyzeme/src/file_formats/v7.rs

@@ -20,9 +20,7 @@ pub struct EventDecoder {
 }
 
 impl EventDecoder {
- pub fn new(
- entire_file_data: Vec<u8>,
- ) -> Result<EventDecoder, Box<dyn Error + Send + Sync>> {
+ pub fn new(entire_file_data: Vec<u8>) -> Result<EventDecoder, Box<dyn Error + Send + Sync>> {
  let legacy_profiling_data = ProfilingData::from_paged_buffer(entire_file_data)?;
 
  let metadata = Metadata {

analyzeme/src/profiling_data.rs

@@ -61,18 +61,23 @@ impl ProfilingData {
  )?;
 
  let event_decoder: Box<dyn file_formats::EventDecoder> = match file_format_version {
- file_formats::v7::FILE_FORMAT => Box::new(file_formats::v7::EventDecoder::new(
- data
- )?),
+ file_formats::v7::FILE_FORMAT => Box::new(file_formats::v7::EventDecoder::new(data)?),
  file_formats::v8::FILE_FORMAT => Box::new(file_formats::v8::EventDecoder::new(
  data,
  diagnostic_file_path,
  )?),
  unsupported_version => {
- let msg = format!(
- "File version {} is not support by this version of measureme.",
- unsupported_version
- );
+ let msg = if unsupported_version > file_formats::current::FILE_FORMAT {
+ format!(
+ "File version {} is too new for this version of measureme. Try upgrading your tools to the latest version.",
+ unsupported_version
+ )
+ } else {
+ format!(
+ "File version {} is too old to be supported by this version of measureme.",
+ unsupported_version
+ )
+ };
 
  return Err(From::from(msg));
  }

decodeme/src/lib.rs

@@ -9,11 +9,7 @@ use std::{
 use event::Event;
 use event_payload::EventPayload;
 use lightweight_event::LightweightEvent;
-use measureme::{
- file_header::{
- verify_file_header, FILE_MAGIC_EVENT_STREAM,
- },
-};
+use measureme::file_header::{verify_file_header, FILE_MAGIC_EVENT_STREAM};
 
 pub mod event;
 pub mod event_payload;