Crate cargo_config2

Load and resolve Cargo configuration.

This library is intended to accurately emulate the actual behavior of Cargo configuration, for example, this supports the following behaviors:

• Hierarchical structure and merge
• Environment variables and relative paths resolution.
• target.<triple> and target.<cfg> resolution.

Supported tables and fields are mainly based on cargo-llvm-cov’s use cases, but feel free to submit an issue if you see something missing in your use case.

Examples

// Read config files hierarchically from the current directory, merge them,
// apply environment variables, and resolve relative paths.
let config = cargo_config2::Config::load()?;
let target = "x86_64-unknown-linux-gnu";
// Resolve target-specific configuration (`target.<triple>` and `target.<cfg>`),
// and returns the resolved rustflags for `target`.
let rustflags = config.rustflags(target)?;
println!("{rustflags:?}");

See also the get example that partial re-implementation of cargo config get using cargo-config2.