extern crate cmake;
extern crate bindgen;
use std::env;
use std::path::Path;
use std::path::PathBuf;

fn main() {
    let _ = cmake::build("libspatialindex");
    let dir = env::var("OUT_DIR").unwrap();
    println!(
        "cargo:rustc-link-search={}",
        Path::new(&dir).join("lib").display()
    );
    println!("cargo:rustc-link-lib=spatialindex_c");
    // The bindgen::Builder is the main entry point
    // to bindgen, and lets you build up options for
    // the resulting bindings.
    // but first, we need the contents of a wrapper.h
    let include = "#include <stddef.h>".to_string();
    let lines = vec![
        include,
        format!(
            "#include <{}>",
            Path::new(&dir)
                .join("include/spatialindex/capi/sidx_api.h")
                .display()
        ),
    ];
    // now we can generate bindings
    let bindings = bindgen::Builder::default()
        // The input header we would like to generate
        // bindings for.
        .header_contents("wrapper.h", &lines.join("\n"))
        // Finish the builder and generate the bindings.
        .generate()
        // Unwrap the Result and panic on failure.
        .expect("Unable to generate bindings");

    // Write the bindings to the $OUT_DIR/bindings.rs file.
    let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
    bindings
        .write_to_file(out_path.join("bindings.rs"))
        .expect("Couldn't write bindings!");
}