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Cleanup rust-src remapping and real dir #142318

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Jun 12, 2025
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Cleanup rust-src remapping and real dir #142318

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29 changes: 1 addition & 28 deletions compiler/rustc_metadata/src/rmeta/decoder.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1649,34 +1649,7 @@ impl<'a> CrateMetadataRef<'a> {
old_name
&& let Ok(rest) = virtual_name.strip_prefix(virtual_dir)
{
// The std library crates are in
// `$sysroot/lib/rustlib/src/rust/library`, whereas other crates
// may be in `$sysroot/lib/rustlib/src/rust/` directly. So we
// detect crates from the std libs and handle them specially.
const STD_LIBS: &[&str] = &[
"core",
"alloc",
"std",
"test",
"term",
"unwind",
"proc_macro",
"panic_abort",
"panic_unwind",
"profiler_builtins",
"rtstartup",
"rustc-std-workspace-core",
"rustc-std-workspace-alloc",
"rustc-std-workspace-std",
"backtrace",
];
let is_std_lib = STD_LIBS.iter().any(|l| rest.starts_with(l));

let new_path = if is_std_lib {
real_dir.join("library").join(rest)
} else {
real_dir.join(rest)
};
let new_path = real_dir.join(rest);

debug!(
"try_to_translate_virtual_to_real: `{}` -> `{}`",
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