6177c6584b
cc rust-lang/rust#71249 This implements the Cargo side of 'Cargo report future-incompat' Based on feedback from alexcrichton and est31, I'm implemented this a flag `--future-compat-report` on `cargo check/build/rustc`, rather than a separate `cargo describe-future-incompatibilities` command. This allows us to avoid writing additional information to disk (beyond the pre-existing recording of rustc command outputs). This PR contains: * Gating of all functionality behind `-Z report-future-incompat`. Without this flag, all user output is unchanged. * Passing `-Z emit-future-incompat-report` to rustc when `-Z report-future-incompat` is enabled * Parsing the rustc JSON future incompat report, and displaying it it a user-readable format. * Emitting a warning at the end of a build if any crates had future-incompat reports * A `--future-incompat-report` flag, which shows the full report for each affected crate. * Tests for all of the above. At the moment, we can use the `array_into_iter` to write a test. However, we might eventually get to a point where rustc is not currently emitting future-incompat reports for any lints. What would we want the cargo tests to do in this situation? This functionality didn't require any significant internal changes to Cargo, with one exception: we now process captured command output for all units, not just ones where we want to display warnings. This may result in a slightly longer time to run `cargo build/check/rustc` from a full cache. since we do slightly more work for each upstream dependency. Doing this seems unavoidable with the current architecture, since we need to process captured command outputs to detect any future-incompat-report messages that were emitted. |
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Cargo
Cargo downloads your Rust project’s dependencies and compiles your project.
Learn more at https://doc.rust-lang.org/cargo/
Code Status
Code documentation: https://docs.rs/cargo/
Installing Cargo
Cargo is distributed by default with Rust, so if you've got rustc installed
locally you probably also have cargo installed locally.
Compiling from Source
Cargo requires the following tools and packages to build:
gitcurl(on Unix)pkg-config(on Unix, used to figure out thelibsslheaders/libraries)- OpenSSL headers (only for Unix, this is the
libssl-devpackage on ubuntu) cargoandrustc
First, you'll want to check out this repository
git clone https://github.com/rust-lang/cargo
cd cargo
With cargo already installed, you can simply run:
cargo build --release
Adding new subcommands to Cargo
Cargo is designed to be extensible with new subcommands without having to modify Cargo itself. See the Wiki page for more details and a list of known community-developed subcommands.
Releases
Cargo releases coincide with Rust releases. High level release notes are available as part of Rust's release notes. Detailed release notes are available in this repo at CHANGELOG.md.
Reporting issues
Found a bug? We'd love to know about it!
Please report all issues on the GitHub issue tracker.
Contributing
See the Cargo Contributor Guide for a complete introduction to contributing to Cargo.
License
Cargo 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.
Third party software
This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit (https://www.openssl.org/).
In binary form, this product includes software that is licensed under the terms of the GNU General Public License, version 2, with a linking exception, which can be obtained from the upstream repository.
See LICENSE-THIRD-PARTY for details.