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bors c8fc20158d Auto merge of #110699 - jyn514:simulate-remapped-already-remapped, r=cjgillot 
Apply simulate-remapped-rust-src-base even if remap-debuginfo is set in config.toml

This is really a mess. Here is the situation before this change:

- UI tests depend on not having `rust-src` available. In particular, <3f374128ee/tests/ui/tuple/wrong_argument_ice.stderr (L7-L8)> is depending on the `note` being a single line and not showing the source code.
- When `download-rustc` is disabled, we pass `-Zsimulate-remapped-rust-src-base=/rustc/FAKE_PREFIX` `-Ztranslate-remapped-path-to-local-path=no`, which changes the diagnostic to something like `  --> /rustc/FAKE_PREFIX/library/alloc/src/collections/vec_deque/mod.rs:1657:12`
- When `download-rustc` is enabled, we still pass those flags, but they no longer have an effect. Instead rustc emits diagnostic paths like this: `  --> /rustc/39c6804b92aa202369e402525cee329556bc1db0/library/alloc/src/collections/vec_deque/mod.rs:1657:12`. Notice how there's a real commit and not `FAKE_PREFIX`. This happens because we set `CFG_VIRTUAL_RUST_SOURCE_BASE_DIR` during bootstrapping for CI artifacts, and rustc previously didn't allow for `simulate-remapped` to affect paths that had already been remapped.
- Pietro noticed this and decided the right thing was to normalize `/rustc/<commit>` to `$SRC_DIR` in compiletest: 470423c3d2
- After my change to `x test core`, which rebuilds stage 2 std from source so `build/stage2-std` and `build/stage2` use the same `.rlib` metadata, the compiler suddenly notices it has sources for `std` available and prints those in the diagnostic, causing the test to fail.

This changes `simulate-remapped-rust-src-base` to support remapping paths that have already been remapped, unblocking download-rustc.

Unfortunately, although this fixes the specific problem for
download-rustc, it doesn't seem to affect all the compiler's
diagnostics. In particular, various `mir-opt` tests are failing to
respect `simulate-remapped-path-prefix` (I looked into fixing this but
it seems non-trivial). As a result, we can't remove the normalization in
compiletest that maps `/rustc/<commit>` to `$SRC_DIR`, so this change is
currently untested anywhere except locally.

You can test this locally yourself by setting `rust.remap-debuginfo = true`, running any UI test with `ERROR` annotations, then rerunning the test manually with a dev toolchain to verify it prints `/rustc/FAKE_PREFIX`, not `/rustc/1.71.0`.

Helps with https://github.com/rust-lang/rust/issues/110352.
2023-05-13 10:10:59 +00:00
.cargo Add CARGO_WORKSPACE_DIR env var in .cargo/config.toml 2022-07-19 13:02:16 +02:00
.github Build i686-pc-windows-msvc binaries 2023-02-11 17:50:48 +02:00
.vscode Take into account renamed extension id when launching 2022-08-12 18:06:58 +02:00
assets Automatically change text color in logo based on dark mode 2022-03-06 23:06:53 +11:00
bench_data internal: Rename AstDatabase to ExpandDatabase 2023-03-13 16:35:41 +01:00
crates Remove identity_future from stdlib 2023-05-07 10:52:01 +02:00
docs Add and use rust-analyzer.cargo.extraArgs setting 2023-03-12 13:04:24 +02:00
editors/code Auto merge of #14307 - davidbarsky:davidbarsky/add-cargo-style-project-discovery-for-buck-and-bazel-sickos, r=Veykril 2023-03-14 17:48:49 +00:00
lib Add View Mir command and fix some bugs 2023-03-06 21:09:09 +03:30
xtask Add version placeholder to changelog template 2023-02-12 10:55:49 +02:00
.editorconfig prettier config 2022-05-17 18:12:49 +01:00
.git-blame-ignore-revs add prettier format commit to ignored revisions 2022-05-17 18:15:51 +01:00
.gitattributes Fix .gitattributes for test_data 2022-07-24 14:05:35 +02:00
.gitignore internal: add "Shuffle Crate Graph" command 2021-12-07 16:37:19 +01:00
Cargo.lock Bump chalk to 0.89 2023-03-19 16:45:26 +09:00
Cargo.toml internal: Enable smallvec's union feature 2023-02-14 17:01:01 +01:00
LICENSE-APACHE Licenses 2018-01-10 22:47:04 +03:00
LICENSE-MIT Licenses 2018-01-10 22:47:04 +03:00
PRIVACY.md Update privacy note 2021-12-23 14:04:15 +02:00
README.md Fix r-a spelling in some places 2022-08-01 13:47:09 +02:00
rustfmt.toml Remove forcing \n via rustfmt 2019-11-02 22:19:59 +03:00
triagebot.toml Add rustbot features related to PR state labels 2022-11-04 15:27:50 +03:30

README.md

rust-analyzer logo

rust-analyzer is a modular compiler frontend for the Rust language. It is a part of a larger rls-2.0 effort to create excellent IDE support for Rust.

Quick Start

https://rust-analyzer.github.io/manual.html#installation

Documentation

If you want to contribute to rust-analyzer or are just curious about how things work under the hood, check the ./docs/dev folder.

If you want to use rust-analyzer's language server with your editor of choice, check the manual folder. It also contains some tips & tricks to help you be more productive when using rust-analyzer.

Security and Privacy

See the corresponding sections of the manual.

Communication

For usage and troubleshooting requests, please use "IDEs and Editors" category of the Rust forum:

https://users.rust-lang.org/c/ide/14

For questions about development and implementation, join rust-analyzer working group on Zulip:

https://rust-lang.zulipchat.com/#narrow/stream/185405-t-compiler.2Frust-analyzer

Quick Links

License

rust-analyzer is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0).

See LICENSE-APACHE and LICENSE-MIT for details.