19d38e5575
Fix rebuild_sub_package_then_while_package on HFS. This test was flaky on HFS ([azure failure](https://dev.azure.com/rust-lang/cargo/_build/results?buildId=20144&view=logs&j=a5e52b91-c83f-5429-4a68-c246fc63a4f7&t=d4864165-4be3-5e34-b483-a6b05303aa68&l=2018)), resulting in this error: ``` Compiling foo v0.0.1 (/Users/runner/runners/2.164.7/work/1/s/target/cit/t750/foo) error[E0460]: found possibly newer version of crate `b` which `a` depends on --> src/lib.rs:1:1 | 1 | extern crate a; extern crate b; pub fn toplevel() {} | ^^^^^^^^^^^^^^^ | = note: perhaps that crate needs to be recompiled? = note: the following crate versions were found: crate `b`: /Users/runner/runners/2.164.7/work/1/s/target/cit/t750/foo/target/debug/deps/libb-98160c67a5811c37.rlib crate `b`: /Users/runner/runners/2.164.7/work/1/s/target/cit/t750/foo/target/debug/deps/libb-98160c67a5811c37.rmeta crate `a`: /Users/runner/runners/2.164.7/work/1/s/target/cit/t750/foo/target/debug/deps/liba-7d2b9ccd932a36e9.rmeta ``` There are two race-condition bugs here. Race 1: The second cargo build command (`cargo build -pb`) would sometimes not build, because it thought `b` is fresh. This can happen when the first build finishes and changing `b/src/lib.rs` happen within the same second. (#5918) The test silently ignored this failure, this is not the cause of the CI failure, though. Race 2: The first and second build commands work as expected. The third build command fails because it thinks both `a` and `b` are "fresh". However, `b` was just rebuilt, and `a` depends on it, so `a` should have been rebuilt. It thinks `a` is fresh because `a`'s mtime is equal to `b` when `b` finishes compiling within the same second that the first build finished. The solution here is to make sure the second step happens well after the first. The underlying problem is #5918.
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 CONTRIBUTING.md. You may also find the architecture documentation useful (ARCHITECTURE.md).
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.