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Account for -Z simulate-remapped-rust-src-base when resolving remapped paths #97786

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merged 1 commit into from
Jun 29, 2022
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Account for -Z simulate-remapped-rust-src-base when resolving remapped paths #97786

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38 changes: 22 additions & 16 deletions compiler/rustc_metadata/src/rmeta/decoder.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -41,7 +41,7 @@ use std::io;
use std::iter::TrustedLen;
use std::mem;
use std::num::NonZeroUsize;
use std::path::Path;
use std::path::PathBuf;
use tracing::debug;

pub(super) use cstore_impl::provide;
Expand Down Expand Up @@ -1472,28 +1472,34 @@ impl<'a, 'tcx> CrateMetadataRef<'a> {
//
// NOTE: if you update this, you might need to also update bootstrap's code for generating
// the `rust-src` component in `Src::run` in `src/bootstrap/dist.rs`.
let virtual_rust_source_base_dir = option_env!("CFG_VIRTUAL_RUST_SOURCE_BASE_DIR")
.map(Path::new)
.filter(|_| {
// Only spend time on further checks if we have what to translate *to*.
sess.opts.real_rust_source_base_dir.is_some()
// Some tests need the translation to be always skipped.
&& sess.opts.debugging_opts.translate_remapped_path_to_local_path
})
.filter(|virtual_dir| {
// Don't translate away `/rustc/$hash` if we're still remapping to it,
// since that means we're still building `std`/`rustc` that need it,
// and we don't want the real path to leak into codegen/debuginfo.
!sess.opts.remap_path_prefix.iter().any(|(_from, to)| to == virtual_dir)
});
let virtual_rust_source_base_dir = [
option_env!("CFG_VIRTUAL_RUST_SOURCE_BASE_DIR").map(PathBuf::from),
sess.opts.debugging_opts.simulate_remapped_rust_src_base.clone(),
]
.into_iter()
.filter(|_| {
// Only spend time on further checks if we have what to translate *to*.
sess.opts.real_rust_source_base_dir.is_some()
// Some tests need the translation to be always skipped.
&& sess.opts.debugging_opts.translate_remapped_path_to_local_path
})
.flatten()
.filter(|virtual_dir| {
// Don't translate away `/rustc/$hash` if we're still remapping to it,
// since that means we're still building `std`/`rustc` that need it,
// and we don't want the real path to leak into codegen/debuginfo.
!sess.opts.remap_path_prefix.iter().any(|(_from, to)| to == virtual_dir)
})
.collect::<Vec<_>>();

let try_to_translate_virtual_to_real = |name: &mut rustc_span::FileName| {
debug!(
"try_to_translate_virtual_to_real(name={:?}): \
virtual_rust_source_base_dir={:?}, real_rust_source_base_dir={:?}",
name, virtual_rust_source_base_dir, sess.opts.real_rust_source_base_dir,
);

if let Some(virtual_dir) = virtual_rust_source_base_dir {
for virtual_dir in &virtual_rust_source_base_dir {
if let Some(real_dir) = &sess.opts.real_rust_source_base_dir {
if let rustc_span::FileName::Real(old_name) = name {
if let rustc_span::RealFileName::Remapped { local_path: _, virtual_name } =
Expand Down