libzip-sys 0.1.0

libzip ffi binding
Documentation 
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use std::env;
use std::fs;
use std::path::PathBuf;

fn fail_on_empty_directory(name: &str) {
    if fs::read_dir(name).unwrap().count() == 0 {
        println!(
            "The `{}` directory is empty, did you forget to pull the submodules?",
            name
        );
        println!("Try `git submodule update --init --recursive`");
        panic!();
    }
}

fn build_libzip() -> PathBuf {
    let dst = cmake::Config::new("libzip")
        .define("BUILD_SHARED_LIBS", "OFF")
        .build_target("zip")
        .build();
    println!("cargo:rustc-link-search=native={}/build/lib", dst.display());
    println!("cargo:rustc-link-lib=static=zip");
    return dst;
}

fn main() {
    fail_on_empty_directory("libzip");
    let libzip_build_path = build_libzip();
    println!("cargo:rerun-if-changed=libzip/lib/zip.h");
    let bindings = bindgen::Builder::default()
        .header("libzip/lib/zip.h")
        .clang_arg(format!("-I{}/build", libzip_build_path.display()))
        .parse_callbacks(Box::new(bindgen::CargoCallbacks))
        .generate()
        .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!");
}