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use std::{env, error::Error};
fn main() -> Result<(), Box<dyn Error>> {
println!("cargo:rustc-env=ISAHC_FEATURES={}", get_feature_string());
Ok(())
}
/// Generate a "feature string" for the crate features currently enabled.
fn get_feature_string() -> String {
env::vars()
.filter(|(name, _)| name.starts_with("CARGO_FEATURE_"))
.filter(|(_, value)| value == "1")
.map(|(name, _)| name.trim_start_matches("CARGO_FEATURE_").to_lowercase())
.map(|name| name.replace('_', "-"))
.collect::<Vec<String>>()
.join(",")
}
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