bendns' repos / rust-analyzer
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'xtask/src/pgo.rs')
-rw-r--r--xtask/src/pgo.rs25
1 files changed, 17 insertions, 8 deletions
diff --git a/xtask/src/pgo.rs b/xtask/src/pgo.rs
index 7f7b3311d9..0c6f499811 100644
--- a/xtask/src/pgo.rs
+++ b/xtask/src/pgo.rs
@@ -53,14 +53,23 @@ pub(crate) fn gather_pgo_profile<'a>(
// Merge profiles into a single file
let merged_profile = pgo_dir.join("merged.profdata");
- let profile_files = std::fs::read_dir(pgo_dir)?.filter_map(|entry| {
- let entry = entry.ok()?;
- if entry.path().extension() == Some(OsStr::new("profraw")) {
- Some(entry.path().to_str().unwrap().to_owned())
- } else {
- None
- }
- });
+ let profile_files = std::fs::read_dir(pgo_dir)?
+ .filter_map(|entry| {
+ let entry = entry.ok()?;
+ if entry.path().extension() == Some(OsStr::new("profraw")) {
+ Some(entry.path().to_str().unwrap().to_owned())
+ } else {
+ None
+ }
+ })
+ .collect::<Vec<_>>();
+
+ if profile_files.is_empty() {
+ anyhow::bail!(
+ "rust-analyzer analysis-stats produced no pgo files. This is a bug in rust-analyzer; please file an issue."
+ );
+ }
+
cmd!(sh, "{llvm_profdata} merge {profile_files...} -o {merged_profile}").run().context(
"cannot merge PGO profiles. Do you have the rustup `llvm-tools` component installed?",
)?;