cc80b40f1c
Unify cargo and rustc's error reporting Fixes https://github.com/rust-lang/rust/issues/86854. ## Don't print "run the command again with --verbose" Here is a typical error seen by users of Cargo: ``` error[E0601]: `main` function not found in crate `wrong` | = note: consider adding a `main` function to `src/main.rs` error: aborting due to previous error For more information about this error, try `rustc --explain E0601`. error: could not compile `wrong` To learn more, run the command again with --verbose. ``` The `--verbose` output is not particularly helpful in this case. The error is unrelated to what cargo is doing, and passing `--verbose` will not give useful information about how to proceed. Additionally, it's unclear that `--verbose` is referring to the cargo command and not rustc; this is especially true when cargo is wrapped by another build system (such as Meson, x.py, or Make). This omits the "run the command again with --verbose" output. --verbose is still shown in `cargo build --help`, but it's not singled out above all the other options. ## Combine rustc and cargo's diagnostic summaries This works by introspecting rustc's error output, using the JSON format to determine whether it's a warning or error, then skipping it altogether if it's a summary of the diagnostics printed. Before: ``` $ cargo check --message-format short src/main.rs:1:10: warning: trait objects without an explicit `dyn` are deprecated src/main.rs:1:1: error[E0601]: `main` function not found in crate `wrong` src/main.rs:1:9: error[E0038]: the trait `Clone` cannot be made into an object error: aborting due to 2 previous errors; 1 warning emitted error: could not compile `wrong` ``` After: ``` $ cargo check --message-format short src/main.rs:1:10: warning: trait objects without an explicit `dyn` are deprecated src/main.rs:1:1: error[E0601]: `main` function not found in crate `wrong` src/main.rs:1:9: error[E0038]: the trait `Clone` cannot be made into an object error: could not compile `wrong` due to 2 previous errors; 1 warning emitted ```
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.