bors e1ff91f439 Auto merge of #83813 - cbeuw:remap-std, r=michaelwoerister ... Fix `--remap-path-prefix` not correctly remapping `rust-src` component paths and unify handling of path mapping with virtualized paths This PR fixes #73167 ("Binaries end up containing path to the rust-src component despite `--remap-path-prefix`") by preventing real local filesystem paths from reaching compilation output if the path is supposed to be remapped. `RealFileName::Named` introduced in #72767 is now renamed as `LocalPath`, because this variant wraps a (most likely) valid local filesystem path. `RealFileName::Devirtualized` is renamed as `Remapped` to be used for remapped path from a real path via `--remap-path-prefix` argument, as well as real path inferred from a virtualized (during compiler bootstrapping) `/rustc/...` path. The `local_path` field is now an `Option<PathBuf>`, as it will be set to `None` before serialisation, so it never reaches any build output. Attempting to serialise a non-`None` `local_path` will cause an assertion faliure. When a path is remapped, a `RealFileName::Remapped` variant is created. The original path is preserved in `local_path` field and the remapped path is saved in `virtual_name` field. Previously, the `local_path` is directly modified which goes against its purpose of "suitable for reading from the file system on the local host". `rustc_span::SourceFile`'s fields `unmapped_path` (introduced by #44940) and `name_was_remapped` (introduced by #41508 when `--remap-path-prefix` feature originally added) are removed, as these two pieces of information can be inferred from the `name` field: if it's anything other than a `FileName::Real(_)`, or if it is a `FileName::Real(RealFileName::LocalPath(_))`, then clearly `name_was_remapped` would've been false and `unmapped_path` would've been `None`. If it is a `FileName::Real(RealFileName::Remapped{local_path, virtual_name})`, then `name_was_remapped` would've been true and `unmapped_path` would've been `Some(local_path)`. cc `@eddyb` who implemented `/rustc/...` path devirtualisation		2021-05-12 11:05:56 +00:00
..
test_macros	Remove an unused dependency that made rustdoc crash	2020-12-12 22:13:03 +00:00
counters.rs	Fix typo in counters.rs	2021-01-19 23:42:18 +09:00
debug.rs	fix few typos	2021-04-19 15:57:08 +03:00
graph.rs	Avoid predecessors having Drop impls	2021-05-07 22:44:08 -04:00
mod.rs	Auto merge of #83813 - cbeuw:remap-std, r=michaelwoerister	2021-05-12 11:05:56 +00:00
query.rs	coverage bug fixes and optimization support	2021-03-19 17:11:50 -07:00
spans.rs	Implement span quoting for proc-macros	2021-05-12 00:51:31 -04:00
tests.rs	More improvements to macro coverage	2021-04-28 20:27:27 -07:00