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bors 7e9c2ef30f Auto merge of #13775 - epage:incomplete-dep, r=weihanglo
fix(toml)!: Disallow source-less dependencies

### What does this PR try to resolve?

This is part of #13629 addressing “dependency without path, version, git, workspace specified”.

This turns deps like
foo = { optional = true }
from `version="*"` deps with a warning into errors. This breaking change was deemed acceptable because this behavior has been considered a bug from the beginning.
We have gotten little to no feedback about people wanting this behavior.

This improves our forwards-compatibility story as we can add new dependency sources and they won't be considered a wildcard registry dependency on older cargo.

### How should we test and review this PR?

I removed the `cargo_add` test because it is redundant.

We no longer get the “unused key” warnings because those warnings get deferred to after this error gets reported.

### Additional information
2024-04-18 22:02:05 +00:00
.cargo test: Ensure snapbox works until CARGO_RUSTC_CURRENT_DIR is stabilized 2024-02-16 10:27:48 -06:00
.github chore: tell renovatebot to not touch openssl (temporarily) 2024-04-10 09:29:03 -04:00
benches chore: Rename `Config` to `GlobalContext` 2024-02-20 11:55:15 -07:00
ci ci: big ⚠️ to ensure the CNAME file is always there 2023-10-18 21:31:10 -04:00
crates fix(schemas): Allow parsing pre-release with X 2024-04-17 16:49:22 -05:00
credential chore: Bump versions 2024-03-25 14:13:38 -05:00
src Auto merge of #13775 - epage:incomplete-dep, r=weihanglo 2024-04-18 22:02:05 +00:00
tests Auto merge of #13775 - epage:incomplete-dep, r=weihanglo 2024-04-18 22:02:05 +00:00
.gitignore chore(xtask): Add xtask skeleton 2023-04-25 02:13:56 -05:00
.ignore chore: Don't show genned docs in ripgrep 2022-08-31 16:13:32 -05:00
CHANGELOG.md Add release notes for 1.77.1 2024-04-06 12:49:37 -07:00
CODE_OF_CONDUCT.md Add CoC 2023-01-25 10:18:15 +00:00
CONTRIBUTING.md docs: remove review capacity notice 2023-10-18 13:24:09 -04:00
Cargo.lock test(msrv): Migrate most parse tests to unit tests 2024-04-17 16:47:29 -05:00
Cargo.toml chore(deps): update rust crate gix to 0.62.0 [security] 2024-04-15 21:30:05 +00:00
LICENSE-APACHE HTTPS all the things 2019-01-30 15:34:37 -05:00
LICENSE-MIT Remove inaccurate (misattributed) copyright notices 2017-07-26 17:19:24 -07:00
LICENSE-THIRD-PARTY HTTPS all the things 2019-01-30 15:34:37 -05:00
README.md doc: point to nightly cargo doc 2023-06-07 10:13:05 +01:00
build.rs Add a windows manifest file 2023-12-07 14:24:58 +00:00
clippy.toml chore: Communicate motivation for AtomucU64 2023-11-16 12:34:02 -06:00
deny.toml Fix some typos 2023-09-24 23:10:07 +08:00
publish.py Chore(publish.py): Add cargo-test-* to publication list 2024-03-26 11:17:34 +01:00
triagebot.toml refactor(schema): Make manifest its own directory 2024-03-04 16:44:05 -06:00
windows.manifest.xml Add a windows manifest file 2023-12-07 14:24:58 +00:00



Cargo downloads your Rust projects dependencies and compiles your project.

To start using Cargo, learn more at The Cargo Book.

To start developing Cargo itself, read the Cargo Contributor Guide.

Code Status


Code documentation: https://doc.rust-lang.org/nightly/nightly-rustc/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:

Other requirements:

The following are optional based on your platform and needs.

  • pkg-config — This is used to help locate system packages, such as libssl headers/libraries. This may not be required in all cases, such as using vendored OpenSSL, or on Windows.

  • OpenSSL — Only needed on Unix-like systems and only if the vendored-openssl Cargo feature is not used.

    This requires the development headers, which can be obtained from the libssl-dev package on Ubuntu or openssl-devel with apk or yum or the openssl package from Homebrew on macOS.

    If using the vendored-openssl Cargo feature, then a static copy of OpenSSL will be built from source instead of using the system OpenSSL. This may require additional tools such as perl and make.

    On macOS, common installation directories from Homebrew, MacPorts, or pkgsrc will be checked. Otherwise it will fall back to pkg-config.

    On Windows, the system-provided Schannel will be used instead.

    LibreSSL is also supported.

Optional system libraries:

The build will automatically use vendored versions of the following libraries. However, if they are provided by the system and can be found with pkg-config, then the system libraries will be used instead:

  • libcurl — Used for network transfers.
  • libgit2 — Used for fetching git dependencies.
  • libssh2 — Used for SSH access to git repositories.
  • libz (aka zlib) — Used for data compression.

It is recommended to use the vendored versions as they are the versions that are tested to work with Cargo.


First, you'll want to check out this repository

git clone https://github.com/rust-lang/cargo.git
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.


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.


See the Cargo Contributor Guide for a complete introduction to contributing to Cargo.


Cargo is primarily distributed under the terms of both the MIT license and the Apache License (Version 2.0).


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.