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Implement RFC3137 trim-paths sysroot changes

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This commit is contained in:
Urgau 2024-08-21 18:56:03 +02:00
parent b9dc4a30e1
commit 8075ddb98e
6 changed files with 129 additions and 49 deletions
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99
compiler/rustc_metadata/src/rmeta/decoder.rs
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@ -1622,56 +1622,63 @@ impl<'a> CrateMetadataRef<'a> {
);
for virtual_dir in virtual_rust_source_base_dir.iter().flatten() {
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 } =
old_name
{
if let Ok(rest) = virtual_name.strip_prefix(virtual_dir) {
let virtual_name = virtual_name.clone();
if let Some(real_dir) = &sess.opts.real_rust_source_base_dir
&& let rustc_span::FileName::Real(old_name) = name
&& let rustc_span::RealFileName::Remapped { local_path: _, virtual_name } =
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));
// 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 = if is_std_lib {
real_dir.join("library").join(rest)
} else {
real_dir.join(rest)
};
debug!(
"try_to_translate_virtual_to_real: `{}` -> `{}`",
virtual_name.display(),
new_path.display(),
);
debug!(
"try_to_translate_virtual_to_real: `{}` -> `{}`",
virtual_name.display(),
new_path.display(),
);
let new_name = rustc_span::RealFileName::Remapped {
local_path: Some(new_path),
virtual_name,
};
*old_name = new_name;
}
// Check if the translated real path is affected by any user-requested
// remaps via --remap-path-prefix. Apply them if so.
// Note that this is a special case for imported rust-src paths specified by
// https://rust-lang.github.io/rfcs/3127-trim-paths.html#handling-sysroot-paths.
// Other imported paths are not currently remapped (see #66251).
let (user_remapped, applied) =
sess.source_map().path_mapping().map_prefix(&new_path);
let new_name = if applied {
rustc_span::RealFileName::Remapped {
local_path: Some(new_path.clone()),
virtual_name: user_remapped.to_path_buf(),
}
}
} else {
rustc_span::RealFileName::LocalPath(new_path)
};
*old_name = new_name;
}
}
};