conan-rs

A Rust wrapper of the conan C/C++ package manager (conan.io) to simplify usage in build scripts.

The conan executable is assumed to be conan unless the CONAN environment variable is set.

Add conan to the Cargo.toml build-dependencies section:

```toml

Cargo.toml

[build-dependencies] conan = "0.3" ```

Modify the project build.rs script to invoke cargo and emit the conan build information automatically.

Using conan profiles with names derived from the cargo target information is recommended:

```rust use std::path::Path; use std::env;

use conan::*;

fn main() { let targetos = env::var("CARGOCFGTARGETOS").unwrap(); let targetarch = env::var("CARGOCFGTARGETARCH").unwrap(); let conanprofile = format!("{}-{}", targetos, target_arch);

let command = InstallCommandBuilder::new()
    .with_profile(&conan_profile)
    .build_policy(BuildPolicy::Missing)
    .recipe_path(Path::new("conanfile.txt"))
    .build();

if let Some(build_info) = command.generate() {
    println!("using conan build info");
    build_info.cargo_emit();
}

} ```

The simplest approach is to add a conanfile.txt file alongside build.rs:

[requires] openssl/1.1.1l@devolutions/stable

To test if the conan packages are properly imported, run cargo -vv build, and look for output similar to this:

bash [conan-test 0.1.0] using conan build info [conan-test 0.1.0] cargo:rustc-link-search=native=/Users/mamoreau/.conan/data/openssl/1.1.1l/devolutions/stable/package/ce597277d61571523403b5b500bda70acd77cd8a/lib [conan-test 0.1.0] cargo:rustc-link-lib=crypto [conan-test 0.1.0] cargo:rustc-link-lib=ssl [conan-test 0.1.0] cargo:include=/Users/mamoreau/.conan/data/openssl/1.1.1l/devolutions/stable/package/ce597277d61571523403b5b500bda70acd77cd8a/include [conan-test 0.1.0] cargo:rerun-if-env-changed=CONAN

This sample conan recipe is available here, even if it is not available in a public conan repository.