use bitcoin_hashes::{sha256, Hash};
use std::fs::File;
use std::io::{BufRead, BufReader, Cursor, Read};
use std::os::unix::fs::PermissionsExt;
use std::path::Path;
use std::str::FromStr;
include!("src/versions.rs");
const GITHUB_URL: &str = "https://github.com/RCasatta/electrsd/releases/download/electrs_releases";
fn get_expected_sha256(filename: &str) -> Result<sha256::Hash, ()> {
let file = File::open("sha256").map_err(|_| ())?;
for line in BufReader::new(file).lines().flatten() {
let tokens: Vec<_> = line.split(" ").collect();
if tokens.len() == 2 && filename == tokens[1] {
return sha256::Hash::from_str(tokens[0]).map_err(|_| ());
}
}
Err(())
}
fn main() {
if !HAS_FEATURE {
return;
}
let download_filename_without_extension = electrs_name();
let download_filename = format!("{}.zip", download_filename_without_extension);
dbg!(&download_filename);
let expected_hash = get_expected_sha256(&download_filename).unwrap();
let out_dir = std::env::var_os("OUT_DIR").unwrap();
let electrs_exe_home = Path::new(&out_dir).join("electrs");
let destination_filename = electrs_exe_home
.join(&download_filename_without_extension)
.join("electrs");
dbg!(&destination_filename);
if !destination_filename.exists() {
println!(
"filename:{} version:{} hash:{}",
download_filename, VERSION, expected_hash
);
let url = format!("{}/{}", GITHUB_URL, download_filename);
let mut downloaded_bytes = Vec::new();
let _size = ureq::get(&url)
.call()
.unwrap()
.into_reader()
.read_to_end(&mut downloaded_bytes)
.unwrap();
let downloaded_hash = sha256::Hash::hash(&downloaded_bytes);
assert_eq!(expected_hash, downloaded_hash);
let cursor = Cursor::new(downloaded_bytes);
let mut archive = zip::ZipArchive::new(cursor).unwrap();
let mut file = archive.by_index(0).unwrap();
std::fs::create_dir_all(destination_filename.parent().unwrap()).unwrap();
let mut outfile = std::fs::File::create(&destination_filename).unwrap();
std::io::copy(&mut file, &mut outfile).unwrap();
std::fs::set_permissions(
&destination_filename,
std::fs::Permissions::from_mode(0o755),
)
.unwrap();
}
}