Cargo: Rust Package Manager and Build System

The Cargo Team is a group of volunteers responsible for the development and maintenance of Cargo, the Rust package manager and build tool.

Key responsibilities include:

• Deciding how Cargo and its related libraries evolve.
• Collaborating with the crates.io team on the design and usage of Cargo's index format and registry API.
• Keeping Cargo in an operational state to support Rust's 6-week release cycle.
• Upholding Cargo's Design Principles.

mdman is a small utility designed to create man pages (manual pages) from markdown text files.

Note for developers: This crate is maintained by the Cargo team primarily for internal use within Cargo. It is not intended for direct external use (except as a transitive dependency) and its APIs may undergo major changes or be deprecated without warning.

The Cargo Credential ecosystem provides tools for securely storing and retrieving authentication tokens. It consists of two main parts:

1. cargo-credential: A generic library designed to help developers write their own credential processes.
2. Credential Implementations: Specific packages that integrate with existing secure storage systems (e.g., 1Password, macOS Keychain, libsecret, or Windows Credential Manager).

Cargo is the package manager and build tool for the Rust language. It handles compiling code, managing dependencies, running tests, and publishing packages to registries like crates.io.

Common workflows include:

• Building: Use cargo build to compile a package and its dependencies.
• Running: Use cargo run to execute a binary or example.
• Testing: Use cargo test to run unit and integration tests.
• Initializing: Use cargo new <name> to create a new package or cargo init to initialize a package in an existing directory.

cargo build
cargo run
cargo test
cargo new foobar

Rustfix is a low-level library designed to represent and apply fix suggestions emitted by rustc.

Workflow:

1. Obtain the JSON output from rustc.
2. Pass this JSON to rustfix to parse it into structured representations of the suggestions.
3. Use the library to apply these suggestions to in-memory strings.

Important Limitations:

• It does not execute commands.
• It does not read from or write to the filesystem.
• It is intended for in-memory string manipulation based on compiler diagnostics.

Warning: This crate is primarily maintained for use by Cargo and the Rust compiler test suite. It is not intended for general external use and may undergo major API changes or deprecation without warning.

Cargo is the Rust package manager and build tool. The general syntax for using Cargo is:

cargo [options] command [args]

Commands can be built-in, aliases, or external tools (custom subcommands).

cargo build

Cargo is designed to formalize the canonical Rust workflow by automating standard tasks such as structuring projects, managing dependencies, and running unit tests.

Key design characteristics:

• Workflow Automation: Focuses on distributing software and managing the lifecycle of a Rust project.
• Not a General-Purpose Build Tool: While it can be integrated into other build tools, its primary purpose is the Rust-specific workflow.
• Simplicity through Defaults: Cargo uses layering and sensible defaults to minimize the surface area of configuration (knobs) that a user needs to manage, aiming for consistent and easy standard workflows.

A workspace is a collection of one or more packages, called workspace members, that are managed together.

Key characteristics:

• Shared Lockfile: All packages share a single Cargo.lock file located at the workspace root.
• Shared Output Directory: All packages share a common target directory in the workspace root.
• Unified Commands: You can run commands across all members using flags like cargo check --workspace.
• Metadata Sharing: You can share package metadata, dependencies, and lints across members.
• Root-only Sections: Sections like [patch], [replace], and [profile.*] are only recognized in the workspace root manifest and are ignored in member crates.

Cargo uses environment variables for two primary purposes:

1. Configuration: You can override Cargo's default behavior (such as registry settings or build paths) by setting specific environment variables.
2. Code Detection: Cargo sets certain environment variables during the build process that your code (e.g., via std::env::var) can detect to adapt its behavior based on the build context.

These variables are categorized into those Cargo reads for configuration and those Cargo sets for crates during execution or compilation.

The resolver-tests crate is designed to verify the correctness of Cargo's dependency resolver. It implements a SAT (Boolean satisfiability) solver to serve as a ground truth. By comparing Cargo's resolution results against the SAT solver, the crate ensures that Cargo's dependency resolution logic is mathematically valid.

Note: This crate is primarily maintained by the Cargo team for internal use. It is not intended for external use (except as a transitive dependency) and its APIs may change or be deprecated without notice.