Use cargo metadata to deny build if some dependency crate feature has been enabled

build.rs

use cargo_metadata::{CargoOpt, MetadataCommand};
use std::path::Path;

fn main() {
    let mut manifest = Path::new(&std::env::var("CARGO_MANIFEST_DIR").unwrap()).to_owned();
    manifest.push("Cargo.toml");
    let metadata = MetadataCommand::new()
        .manifest_path(manifest)
        .features(CargoOpt::AllFeatures)
        .exec()
        .unwrap();
    if let Some(resolve) = metadata.resolve {
        for node in &resolve.nodes {
            if node.id.repr.starts_with("serde_json ") {
                if node.features.iter().any(|v| v == "arbitrary_precision") {
                    let deps = resolve
                        .nodes
                        .iter()
                        .filter(|d| d.dependencies.contains(&node.id))
                        .map(|d| d.id.repr.as_str())
                        .collect::<Vec<&str>>();
                    panic!(
                        "serde_json arbitrary_precision MUST be off. Dependents: \n\n{}\n\n",
                        deps.join("\n")
                    );
                }
            }
        }
    }
}