libmseed-sys 0.3.1+3.1.3

Native bindings to the libmseed library
Documentation 
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extern crate bindgen;

use std::env;
use std::path::PathBuf;

const LIB_DIR: &str = "vendor";
const SOURCE_FILES: [&str; 17] = [
    "crc32c.c",
    "extraheaders.c",
    "fileutils.c",
    "genutils.c",
    "gmtime64.c",
    "logging.c",
    "lookup.c",
    "msio.c",
    "msrutils.c",
    "pack.c",
    "packdata.c",
    "parseutils.c",
    "selection.c",
    "tracelist.c",
    "unpack.c",
    "unpackdata.c",
    "yyjson.c",
];

fn main() {
    let package_dir_path = PathBuf::from(&env::var("CARGO_MANIFEST_DIR").unwrap())
        .canonicalize()
        .expect("cannot canonicalize path");

    let lib_dir_path = package_dir_path.join(LIB_DIR);
    let lib_dir_path_str = lib_dir_path.to_str().expect("path is not a valid string");

    // build library
    let mut p = PathBuf::new();
    p.push(LIB_DIR);

    let mut build = cc::Build::new();
    for src_file in SOURCE_FILES {
        let p = p.join(src_file);

        build.file(p);
    }

    build.compile("mseed");

    let headers_path = lib_dir_path.join("libmseed.h");
    if !headers_path.try_exists().is_ok() {
        panic!("header file does not exist");
    }
    let headers_path_str = headers_path.to_str().expect("path is not a valid string");

    println!("cargo:rustc-link-lib=static=mseed");
    println!("cargo:rustc-link-search=native={}", lib_dir_path_str);
    println!("cargo:rerun-if-changed={}", headers_path_str);

    println!("Searching for libraries at: {}", lib_dir_path_str);
    println!("Generate bindings.rs");

    let bindings = bindgen::Builder::default()
        .header(headers_path_str)
        .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()))
        .clang_arg(&format!("-I{}", lib_dir_path_str))
        .allowlist_type("MS.*")
        .allowlist_var("MS_.*")
        .allowlist_var("HPT.*")
        .allowlist_var("DE_.*")
        .allowlist_var("MSF_.*")
        .allowlist_var("NSTERROR")
        .allowlist_var("NSTMODULUS")
        .allowlist_var("LM_SIDLEN")
        .allowlist_function("ms_.*")
        .allowlist_function("msr_.*")
        .allowlist_function("ms3_.*")
        .allowlist_function("mst_.*")
        .allowlist_function("mstl3_.*")
        .allowlist_function("msr3_.*")
        .generate()
        .expect("Unable to generate bindings");

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