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Matthias Krüger cc9a4a2134
Rollup merge of #120001 - dtolnay:bootstrapbootstrap, r=onur-ozkan 
Consistently unset RUSTC_BOOTSTRAP when compiling bootstrap

Since https://github.com/rust-lang/rust/pull/113906, all x.py invocations performed by rust-analyzer have RUSTC_BOOTSTRAP=1 set. This was to fix https://github.com/rust-lang/rust/issues/112391#issuecomment-1597224941 — rust-analyzer uses some default cargo from the system when fetching workspace layout, and the standard library uses some unstable cargo feature, so x.py would previously fail if the system toolchain wasn't nightly.

82e1608dfa/library/std/Cargo.toml (L1)

This PR changes x.py to cancel out this RUSTC_BOOTSTRAP=1 when compiling bootstrap. It will only remain set when running the compiled bootstrap executable. This fixes spurious bootstrap rebuilds in the event that a rust-analyzer x.py invocation is alternated with someone running x.py themself on the command line, if any dependency of bootstrap looks at `option_env!("RUSTC_BOOTSTRAP")`, which is the case since https://github.com/rust-lang/rust/pull/119654.

**Before:**

```console
$ RUSTC_BOOTSTRAP=1 ./x.py check library/core
Building bootstrap
   Compiling proc-macro2 v1.0.76
   Compiling quote v1.0.35
   Compiling syn v2.0.48
   Compiling clap_derive v4.4.7
   Compiling serde_derive v1.0.195
   Compiling clap v4.4.13
   Compiling clap_complete v4.4.6
   Compiling build_helper v0.1.0
   Compiling bootstrap v0.0.0
    Finished dev [unoptimized] target(s) in 6.31s
Checking stage0 library artifacts {core} (x86_64-unknown-linux-gnu)
    Finished release [optimized] target(s) in 0.23s
Build completed successfully in 0:00:07

$ ./x.py check library/core
Building bootstrap
   Compiling proc-macro2 v1.0.76
   Compiling quote v1.0.35
   Compiling syn v2.0.48
   Compiling clap_derive v4.4.7
   Compiling serde_derive v1.0.195
   Compiling clap v4.4.13
   Compiling clap_complete v4.4.6
   Compiling build_helper v0.1.0
   Compiling bootstrap v0.0.0
    Finished dev [unoptimized] target(s) in 5.30s
Checking stage0 library artifacts {core} (x86_64-unknown-linux-gnu)
    Finished release [optimized] target(s) in 0.25s
Build completed successfully in 0:00:06
```

**After:**

```console
$ RUSTC_BOOTSTRAP=1 ./x.py check library/core
Building bootstrap
    Finished dev [unoptimized] target(s) in 0.06s
Checking stage0 library artifacts {core} (x86_64-unknown-linux-gnu)
    Finished release [optimized] target(s) in 0.14s
Build completed successfully in 0:00:01

$ ./x.py check library/core
Building bootstrap
    Finished dev [unoptimized] target(s) in 0.04s
Checking stage0 library artifacts {core} (x86_64-unknown-linux-gnu)
    Finished release [optimized] target(s) in 0.13s
Build completed successfully in 0:00:01
```
2024-01-17 20:21:21 +01:00
.github Ask for rustc version in diagnostic reports, remind users to update their toolchain 2024-01-07 02:09:55 +00:00
.reuse Rollup merge of #119189 - henrispriet:move-installing-from-source, r=Mark-Simulacrum 2024-01-13 22:35:08 +01:00
compiler Rollup merge of #119975 - lukas-code:inferring-return-types-and-opaque-types-do-mix-sometimes, r=compiler-errors 2024-01-17 20:21:20 +01:00
library Rollup merge of #119855 - rellerreller:freebsd-static, r=wesleywiser 2024-01-17 20:21:19 +01:00
LICENSES Add missing CC-BY-SA-4.0. 2023-11-27 11:03:53 +00:00
src Rollup merge of #120001 - dtolnay:bootstrapbootstrap, r=onur-ozkan 2024-01-17 20:21:21 +01:00
tests Rollup merge of #119975 - lukas-code:inferring-return-types-and-opaque-types-do-mix-sometimes, r=compiler-errors 2024-01-17 20:21:20 +01:00
.editorconfig Only use max_line_length = 100 for *.rs 2023-07-10 15:18:36 -07:00
.git-blame-ignore-revs Ignore let-chains formatting 2023-10-15 18:30:34 +00:00
.gitattributes Rename config.toml.example to config.example.toml 2023-03-11 14:10:00 -08:00
.gitignore don't globally ignore rustc-ice files 2023-09-16 09:44:44 +02:00
.gitmodules Update to LLVM 17.0.6 2023-12-14 09:54:14 +01:00
.mailmap Add my work email to the mailmap 2023-11-26 18:39:38 +01:00
Cargo.lock Auto merge of #119111 - michaelwoerister:measureme-11, r=Mark-Simulacrum 2024-01-17 09:32:03 +00:00
Cargo.toml Bump salsa 2024-01-10 08:47:26 +01:00
CODE_OF_CONDUCT.md Remove the code of conduct; instead link https://www.rust-lang.org/conduct.html 2019-10-05 22:55:19 +02:00
config.example.toml add a new optimized_compiler_builtins option 2024-01-07 13:04:40 +03:00
configure Enforce Python 3 as much as possible 2020-04-10 09:09:58 -04:00
CONTRIBUTING.md fix: Update CONTRIBUTING.md recommend -> recommended 2023-11-16 23:57:09 +05:30
COPYRIGHT Update COPYRIGHT file 2022-10-30 10:23:14 -04:00
INSTALL.md Move section "Installing from Source" to seperate file 2024-01-13 17:22:55 +01:00
LICENSE-APACHE Remove appendix from LICENCE-APACHE 2019-12-30 14:25:53 +00:00
LICENSE-MIT LICENSE-MIT: Remove inaccurate (misattributed) copyright notice 2017-07-26 16:51:58 -07:00
README.md Move section "Installing from Source" to seperate file 2024-01-13 17:22:55 +01:00
RELEASES.md apply last suggestions from code review 2023-12-21 13:26:15 +01:00
rust-bors.toml Add integration for new bors 2023-09-28 10:43:24 +02:00
rustfmt.toml rustfmt.toml: don't ignore just any tests path, only root one 2024-01-11 14:59:59 +03:00
triagebot.toml Remove Zulip rustdoc nomination alert 2024-01-14 13:55:18 +01:00
x Make x capable of resolving symlinks 2023-10-14 17:53:33 +03:00
x.ps1 use & instead of start-process in x.ps1 2023-12-09 09:46:16 -05:00
x.py Fix recent python linting errors 2023-08-02 04:40:28 -04:00

README.md

The Rust Programming Language

Rust Community

This is the main source code repository for Rust. It contains the compiler, standard library, and documentation.

Note: this README is for users rather than contributors. If you wish to contribute to the compiler, you should read CONTRIBUTING.md instead.

Table of Contents

Quick Start

Read "Installation" from The Book.

Installing from source

If you really want to install from source (though this is not recommended), see INSTALL.md.

Getting Help

See https://www.rust-lang.org/community for a list of chat platforms and forums.

Contributing

See CONTRIBUTING.md.

License

Rust is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0), with portions covered by various BSD-like licenses.

See LICENSE-APACHE, LICENSE-MIT, and COPYRIGHT for details.

Trademark

The Rust Foundation owns and protects the Rust and Cargo trademarks and logos (the "Rust Trademarks").

If you want to use these names or brands, please read the media guide.

Third-party logos may be subject to third-party copyrights and trademarks. See Licenses for details.