use krates::{Builder, Cmd, Krates, cm, petgraph};
fn main() -> Result<(), krates::Error> {
    let mut cmd = Cmd::new();
    cmd.manifest_path("path/to/a/Cargo.toml");
    // Enable all features, works for either an entire workspace or a single crate
    cmd.all_features();

    let mut builder = Builder::new();
    // Let's filter out any crates that aren't used by x86_64 windows
    builder.include_targets(std::iter::once(("x86_64-pc-windows-msvc", vec![])));

    let krates: Krates = builder.build(cmd, |pkg: cm::Package| {
        println!("Crate {} was filtered out", pkg.id);
    })?;

    // Print a dot graph of the entire crate graph
    println!("{:?}", petgraph::dot::Dot::new(krates.graph()));

    Ok(())
}

fn get_metadata(
    no_default_features: bool,
    all_features: bool,
    features: Vec<String>,
    manifest_path: PathBuf,
) -> Result<krates::cm::Metadata, anyhow::Error> {
    let config = cargo::util::Config::default()?;
    let ws = cargo::core::Workspace::new(&manifest_path, &config)?;
    let options = cargo::ops::OutputMetadataOptions {
        features,
        no_default_features,
        all_features,
        no_deps: false,
        version: 1,
        filter_platforms: vec![],
    };

    let md = cargo::ops::output_metadata(&ws, &options)?;
    let md_value = serde_json::to_value(md)?;

    Ok(serde_json::from_value(md_value)?)
}