extern crate "pkg-config" as pkg_config;

use std::os;
use std::io::{mod, fs, Command};
use std::io::process::InheritFd;

//TODO windows support

fn main() {
    // Next, fall back and try to use pkg-config if its available.
    match pkg_config::find_library("librocksdb") {
        Ok(()) => return,
        Err(..) => {}
    }

    let src = os::getcwd().unwrap();
    let dst = Path::new(os::getenv("OUT_DIR").unwrap());

    let _ = fs::mkdir(&dst.join("build"), io::USER_DIR);

    println!("cwd: {}", src.join("rocksdb").as_str());
    run(Command::new(make())
                .arg("shared_lib")
                .arg(format!("-j{}", os::getenv("NUM_JOBS").unwrap()))
                .cwd(&src.join("rocksdb")));

    // Don't run `make install` because apparently it's a little buggy on mingw
    // for windows.
    fs::mkdir_recursive(&dst.join("lib/pkgconfig"), io::USER_DIR).unwrap();

    let target = os::getenv("TARGET").unwrap();
    if target.contains("apple") {
        fs::rename(&src.join("rocksdb/librocksdb.dylib"), &dst.join("lib/librocksdb.dylib")).unwrap();
    } else {
        fs::rename(&src.join("rocksdb/librocksdb.so"), &dst.join("lib/librocksdb.so")).unwrap();
    }

    println!("cargo:rustc-flags=-L {}/lib -l rocksdb:dylib", dst.display());
    println!("cargo:root={}", dst.display());
    println!("cargo:include={}/include", src.join("rocksdb").display());
}

fn run(cmd: &mut Command) {
    println!("running: {}", cmd);
    assert!(cmd.stdout(InheritFd(1))
               .stderr(InheritFd(2))
               .status()
               .unwrap()
               .success());

}

fn make() -> &'static str {
    if cfg!(target_os = "freebsd") {"gmake"} else {"make"}
}