libspot 2.0.0-beta.3.0

Rust bindings for libspot, a fast time series anomaly detector
Documentation 
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use std::env;
use std::fs;
use std::path::Path;
use std::process::Command;

fn main() {
    let out_dir = env::var("OUT_DIR").unwrap();
    let libspot_dir = Path::new(&env::var("CARGO_MANIFEST_DIR").unwrap()).join("libspot");
    let build_dir = Path::new(&out_dir).join("libspot");

    // Copy source and build in OUT_DIR
    Command::new("cp")
        .args([
            "-r",
            &libspot_dir.to_string_lossy(),
            &build_dir.to_string_lossy(),
        ])
        .status()
        .expect("Failed to copy libspot source");

    Command::new("make")
        .current_dir(&build_dir)
        .status()
        .expect("Failed to build libspot");

    // Copy built library to OUT_DIR
    fs::copy(
        build_dir.join("dist/libspot.a.2.0b3"),
        Path::new(&out_dir).join("libspot.a"),
    )
    .expect("Failed to copy library");

    // Tell cargo where to find native libraries (search in OUT_DIR)
    println!("cargo:rustc-link-search=native={out_dir}");

    // Link against the static libspot library
    println!("cargo:rustc-link-lib=static=spot");

    // Link against the math library (required by libspot)
    println!("cargo:rustc-link-lib=m");

    // Rerun build script if libspot source files change
    println!("cargo:rerun-if-changed=libspot/");
}