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bors fa883cb647 Auto merge of #12834 - fasterthanlime:proc-macro-test-toolchain, r=Veykril 
Add PROC_MACRO_TEST_TOOLCHAIN environment variable

This allows overriding the toolchain used to run `proc-macro-srv` tests.

---

Sample usage.

Testing the current ABI (variable unset/empty):

```shell
amos@tails ~/bearcove/rust-analyzer/crates/proc-macro-srv proc-macro-test-toolchain*
❯ PROC_MACRO_TEST_TOOLCHAIN="" cargo test --quiet

running 16 tests
................
test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
```

Testing an older ABI:

```shell
amos@tails ~/bearcove/rust-analyzer/crates/proc-macro-srv proc-macro-test-toolchain*
❯ PROC_MACRO_TEST_TOOLCHAIN="1.58" cargo test --quiet

running 16 tests
................
test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
```

Testing current nightly ABI:

```shell
❯ rustc +nightly --version
rustc 1.64.0-nightly (f8588549c 2022-07-18)

❯ PROC_MACRO_TEST_TOOLCHAIN="nightly" cargo test --quiet

running 16 tests
................
test result: ok. 16 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
```

Testing future ABI (`rust-lang/rust` master):

```shell
amos@tails ~/bearcove/rust-analyzer/crates/proc-macro-srv proc-macro-test-toolchain
❯ PROC_MACRO_TEST_TOOLCHAIN="stage1" cargo test --quiet

running 16 tests
..........thread '<unnamed>' panicked at 'range end index 216221164920373249 out of range for slice of length 18', library/core/src/slice/index.rs:73:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
....F.
failures:

---- tests::test_fn_like_macro2 stdout ----
thread 'tests::test_fn_like_macro2' panicked at 'called `Result::unwrap()` on an `Err` value: "range end index 216221164920373249 out of range for slice of length 18"', crates/proc-macro-srv/src/tests/utils.rs:38:83
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

failures:
    tests::test_fn_like_macro2

test result: FAILED. 15 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s

error: test failed, to rerun pass '--lib
```

---

Tagging `@jonas-schievink:` this might be helpful when updating versioned ABIs later on.
2022-07-20 16:04:23 +00:00
.cargo Add CARGO_WORKSPACE_DIR env var in .cargo/config.toml 2022-07-19 13:02:16 +02:00
.github try fixing spurious CI failures on windows 2022-07-16 11:42:28 +01:00
.vscode Add "Win Attach to Server" debug configuration 2021-01-25 17:46:03 +03:00
assets Automatically change text color in logo based on dark mode 2022-03-06 23:06:53 +11:00
bench_data Add benchmark test for mbe 2021-02-25 05:47:13 +08:00
crates Auto merge of #12834 - fasterthanlime:proc-macro-test-toolchain, r=Veykril 2022-07-20 16:04:23 +00:00
docs Fix obsolete diagnostics.experimental.enable 2022-07-11 16:37:46 +09:00
editors/code Improve file watcher config 2022-07-18 17:50:56 +02:00
lib Run cargo fix --edition-idioms 2022-07-20 15:02:08 +02:00
xtask Enable extra warnings required by rust-lang/rust 2022-07-20 15:00:17 +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 Mark large benchmark data files as binary to filter greps 2021-09-22 12:51:58 -07:00
.gitignore internal: add "Shuffle Crate Graph" command 2021-12-07 16:37:19 +01:00
Cargo.lock Upgrade to expect-test@1.4.0 2022-07-19 13:00:45 +02:00
Cargo.toml style: rename crates to kebab case 2022-05-01 10:48:58 +00:00
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 minor: fix ide docs link 2022-04-13 13:22:45 +02:00
rustfmt.toml Remove forcing \n via rustfmt 2019-11-02 22:19:59 +03:00
triagebot.toml Add triagebot.toml 2022-04-21 17:43:12 +02:00

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.