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Handle build scripts better in -Zmacro-stats output. #143228

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merged 1 commit into from
Jul 1, 2025
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Handle build scripts better in -Zmacro-stats output. #143228

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12 changes: 11 additions & 1 deletion compiler/rustc_interface/src/passes.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -298,6 +298,16 @@ fn configure_and_expand(
fn print_macro_stats(ecx: &ExtCtxt<'_>) {
use std::fmt::Write;

let crate_name = ecx.ecfg.crate_name.as_str();
let crate_name = if crate_name == "build_script_build" {
// This is a build script. Get the package name from the environment.
let pkg_name =
std::env::var("CARGO_PKG_NAME").unwrap_or_else(|_| "<unknown crate>".to_string());
format!("{pkg_name} build script")
} else {
crate_name.to_string()
};

// No instability because we immediately sort the produced vector.
#[allow(rustc::potential_query_instability)]
let mut macro_stats: Vec<_> = ecx
Expand Down Expand Up @@ -327,7 +337,7 @@ fn print_macro_stats(ecx: &ExtCtxt<'_>) {
// non-interleaving, though.
let mut s = String::new();
_ = writeln!(s, "{prefix} {}", "=".repeat(banner_w));
_ = writeln!(s, "{prefix} MACRO EXPANSION STATS: {}", ecx.ecfg.crate_name);
_ = writeln!(s, "{prefix} MACRO EXPANSION STATS: {}", crate_name);
_ = writeln!(
s,
"{prefix} {:<name_w$}{:>uses_w$}{:>lines_w$}{:>avg_lines_w$}{:>bytes_w$}{:>avg_bytes_w$}",
Expand Down
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