Move logic for making potentially remapped paths absolute into helper method.
This commit is contained in:
Michael Woerister
parent
90fce805a3
commit
583880b0ff
@ -33,18 +33,14 @@
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use rustc_serialize::{opaque, Encodable, Encoder};
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use rustc_session::config::CrateType;
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use rustc_session::cstore::{ForeignModule, LinkagePreference, NativeLib};
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use rustc_span::hygiene::{ExpnIndex, HygieneEncodeContext, MacroKind};
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use rustc_span::symbol::{sym, Ident, Symbol};
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use rustc_span::{
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self, DebuggerVisualizerFile, ExternalSource, FileName, SourceFile, Span, SyntaxContext,
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};
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use rustc_span::{
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hygiene::{ExpnIndex, HygieneEncodeContext, MacroKind},
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RealFileName,
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};
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use rustc_target::abi::VariantIdx;
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use std::hash::Hash;
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use std::num::NonZeroUsize;
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use std::path::Path;
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use tracing::{debug, trace};
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pub(super) struct EncodeContext<'a, 'tcx> {
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@ -490,6 +486,8 @@ fn encode_source_map(&mut self) -> Lazy<[rustc_span::SourceFile]> {
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// is done.
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let required_source_files = self.required_source_files.take().unwrap();
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let working_directory = &self.tcx.sess.opts.working_dir;
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let adapted = all_source_files
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.iter()
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.enumerate()
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@ -502,66 +500,33 @@ fn encode_source_map(&mut self) -> Lazy<[rustc_span::SourceFile]> {
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(!source_file.is_imported() || self.is_proc_macro)
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})
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.map(|(_, source_file)| {
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let mut adapted = match source_file.name {
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FileName::Real(ref realname) => {
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let mut adapted = (**source_file).clone();
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adapted.name = FileName::Real(match realname {
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RealFileName::LocalPath(path_to_file) => {
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// Prepend path of working directory onto potentially
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// relative paths, because they could become relative
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// to a wrong directory.
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// We include `working_dir` as part of the crate hash,
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// so it's okay for us to use it as part of the encoded
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// metadata.
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let working_dir = &self.tcx.sess.opts.working_dir;
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match working_dir {
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RealFileName::LocalPath(absolute) => {
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// Although neither working_dir or the file name were subject
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// to path remapping, the concatenation between the two may
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// be. Hence we need to do a remapping here.
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let joined = Path::new(absolute).join(path_to_file);
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let (joined, remapped) =
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source_map.path_mapping().map_prefix(joined);
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if remapped {
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RealFileName::Remapped {
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local_path: None,
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virtual_name: joined,
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}
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} else {
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RealFileName::LocalPath(joined)
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}
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}
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RealFileName::Remapped { local_path: _, virtual_name } => {
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// If working_dir has been remapped, then we emit
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// Remapped variant as the expanded path won't be valid
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RealFileName::Remapped {
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local_path: None,
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virtual_name: Path::new(virtual_name)
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.join(path_to_file),
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}
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}
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}
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}
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RealFileName::Remapped { local_path: _, virtual_name } => {
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RealFileName::Remapped {
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// We do not want any local path to be exported into metadata
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local_path: None,
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virtual_name: virtual_name.clone(),
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}
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}
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});
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adapted.name_hash = {
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let mut hasher: StableHasher = StableHasher::new();
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adapted.name.hash(&mut hasher);
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hasher.finish::<u128>()
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};
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Lrc::new(adapted)
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}
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match source_file.name {
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FileName::Real(ref original_file_name) => {
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let adapted_file_name =
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source_map.path_mapping().to_embeddable_absolute_path(
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original_file_name.clone(),
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working_directory,
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);
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if adapted_file_name != *original_file_name {
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let mut adapted: SourceFile = (**source_file).clone();
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adapted.name = FileName::Real(adapted_file_name);
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adapted.name_hash = {
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let mut hasher: StableHasher = StableHasher::new();
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adapted.name.hash(&mut hasher);
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hasher.finish::<u128>()
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};
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Lrc::new(adapted)
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} else {
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// Nothing to adapt
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source_file.clone()
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}
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}
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// expanded code, not from a file
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_ => source_file.clone(),
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};
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}
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})
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.map(|mut source_file| {
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// We're serializing this `SourceFile` into our crate metadata,
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// so mark it as coming from this crate.
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// This also ensures that we don't try to deserialize the
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@ -569,9 +534,9 @@ fn encode_source_map(&mut self) -> Lazy<[rustc_span::SourceFile]> {
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// dependencies aren't loaded when we deserialize a proc-macro,
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// trying to remap the `CrateNum` would fail.
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if self.is_proc_macro {
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Lrc::make_mut(&mut adapted).cnum = LOCAL_CRATE;
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Lrc::make_mut(&mut source_file).cnum = LOCAL_CRATE;
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}
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adapted
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source_file
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})
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.collect::<Vec<_>>();
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@ -1155,4 +1155,83 @@ fn map_filename_prefix(&self, file: &FileName) -> (FileName, bool) {
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other => (other.clone(), false),
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}
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}
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/// Expand a relative path to an absolute path with remapping taken into account.
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/// Use this when absolute paths are required (e.g. debuginfo or crate metadata).
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///
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/// The resulting `RealFileName` will have its `local_path` portion erased if
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/// possible (i.e. if there's also a remapped path).
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pub fn to_embeddable_absolute_path(
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&self,
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file_path: RealFileName,
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working_directory: &RealFileName,
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) -> RealFileName {
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match file_path {
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// Anything that's already remapped we don't modify, except for erasing
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// the `local_path` portion.
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RealFileName::Remapped { local_path: _, virtual_name } => {
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RealFileName::Remapped {
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// We do not want any local path to be exported into metadata
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local_path: None,
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// We use the remapped name verbatim, even if it looks like a relative
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// path. The assumption is that the user doesn't want us to further
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// process paths that have gone through remapping.
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virtual_name,
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}
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}
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RealFileName::LocalPath(unmapped_file_path) => {
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// If no remapping has been applied yet, try to do so
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let (new_path, was_remapped) = self.map_prefix(unmapped_file_path);
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if was_remapped {
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// It was remapped, so don't modify further
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return RealFileName::Remapped { local_path: None, virtual_name: new_path };
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}
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if new_path.is_absolute() {
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// No remapping has applied to this path and it is absolute,
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// so the working directory cannot influence it either, so
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// we are done.
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return RealFileName::LocalPath(new_path);
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}
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debug_assert!(new_path.is_relative());
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let unmapped_file_path_rel = new_path;
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match working_directory {
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RealFileName::LocalPath(unmapped_working_dir_abs) => {
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let file_path_abs = unmapped_working_dir_abs.join(unmapped_file_path_rel);
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// Although neither `working_directory` nor the file name were subject
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// to path remapping, the concatenation between the two may be. Hence
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// we need to do a remapping here.
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let (file_path_abs, was_remapped) = self.map_prefix(file_path_abs);
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if was_remapped {
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RealFileName::Remapped {
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// Erase the actual path
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local_path: None,
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virtual_name: file_path_abs,
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}
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} else {
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// No kind of remapping applied to this path, so
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// we leave it as it is.
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RealFileName::LocalPath(file_path_abs)
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}
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}
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RealFileName::Remapped {
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local_path: _,
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virtual_name: remapped_working_dir_abs,
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} => {
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// If working_directory has been remapped, then we emit
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// Remapped variant as the expanded path won't be valid
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RealFileName::Remapped {
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local_path: None,
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virtual_name: Path::new(remapped_working_dir_abs)
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.join(unmapped_file_path_rel),
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}
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}
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}
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}
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}
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}
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}
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