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use libflate::gzip::Encoder;
use sha3::{Digest, Sha3_512};
use std::str;
use std::fs::{self, File};
use std::io::{self, stderr, Read, Write, BufWriter};
use std::path::Path;
pub use crate::download::download;
pub use crate::packagemeta::{PackageMeta, PackageMetaList};
pub use crate::package::Package;
pub use crate::database::{Database, PackageDepends};
mod download;
mod packagemeta;
mod package;
mod database;
#[derive(Debug)]
pub struct Repo {
local: String,
remotes: Vec<String>,
target: String,
}
impl Repo {
pub fn new(target: &str) -> Repo {
let mut remotes = vec![];
{
let mut entries = vec![];
if let Ok(read_dir) = fs::read_dir("/etc/pkg.d") {
for entry_res in read_dir {
if let Ok(entry) = entry_res {
let path = entry.path();
if path.is_file() {
entries.push(path);
}
}
}
}
entries.sort();
for entry in entries {
if let Ok(mut file) = File::open(entry) {
let mut data = String::new();
if let Ok(_) = file.read_to_string(&mut data) {
for line in data.lines() {
if ! line.starts_with('#') {
remotes.push(line.to_string());
}
}
}
}
}
}
Repo {
local: format!("/tmp/pkg"),
remotes: remotes,
target: target.to_string()
}
}
pub fn sync(&self, file: &str) -> io::Result<String> {
let local_path = format!("{}/{}", self.local, file);
if let Some(parent) = Path::new(&local_path).parent() {
fs::create_dir_all(parent)?;
}
let mut res = Err(io::Error::new(io::ErrorKind::NotFound, format!("no remote paths")));
for remote in self.remotes.iter() {
let remote_path = format!("{}/{}/{}", remote, self.target, file);
res = download(&remote_path, &local_path).map(|_| local_path.clone());
if res.is_ok() {
break;
}
}
res
}
pub fn signature(&self, file: &str) -> io::Result<String> {
let mut data = vec![];
File::open(&file)?.read_to_end(&mut data)?;
let mut hash = Sha3_512::default();
hash.input(&data);
let output = hash.result();
let mut encoded = String::new();
for b in output.iter() {
encoded.push_str(&format!("{:X}", b));
}
Ok(encoded)
}
pub fn clean(&self, package: &str) -> io::Result<String> {
let tardir = format!("{}/{}", self.local, package);
fs::remove_dir_all(&tardir)?;
Ok(tardir)
}
pub fn create(&self, package: &str) -> io::Result<String> {
if ! Path::new(package).is_dir() {
return Err(io::Error::new(io::ErrorKind::NotFound, format!("{} not found", package)));
}
let sigfile = format!("{}.sig", package);
let tarfile = format!("{}.tar.gz", package);
{
let file = File::create(&tarfile)?;
let encoder = Encoder::new(BufWriter::new(file))?;
let mut tar = tar::Builder::new(encoder);
tar.follow_symlinks(false);
tar.append_dir_all("", package)?;
let encoder = tar.into_inner()?;
let mut file = encoder.finish().into_result()?;
file.flush()?;
}
let mut signature = self.signature(&tarfile)?;
signature.push('\n');
File::create(&sigfile)?.write_all(&signature.as_bytes())?;
Ok(tarfile)
}
pub fn fetch_meta(&self, package: &str) -> io::Result<PackageMeta> {
let tomlfile = self.sync(&format!("{}.toml", package))?;
let mut toml = String::new();
File::open(tomlfile)?.read_to_string(&mut toml)?;
PackageMeta::from_toml(&toml).map_err(|err| {
io::Error::new(io::ErrorKind::InvalidData, format!("TOML error: {}", err))
})
}
pub fn fetch(&self, package: &str) -> io::Result<Package> {
let sigfile = self.sync(&format!("{}.sig", package))?;
let mut expected = String::new();
File::open(sigfile)?.read_to_string(&mut expected)?;
let expected = expected.trim();
{
let tarfile = format!("{}/{}.tar.gz", self.local, package);
if let Ok(signature) = self.signature(&tarfile) {
if signature == expected {
write!(stderr(), "* Already downloaded {}\n", package)?;
return Package::from_path(tarfile);
}
}
}
let tarfile = self.sync(&format!("{}.tar.gz", package))?;
if self.signature(&tarfile)? != expected {
return Err(io::Error::new(io::ErrorKind::InvalidData, format!("{} not valid", package)));
}
Package::from_path(tarfile)
}
pub fn extract(&self, package: &str) -> io::Result<String> {
let tardir = format!("{}/{}", self.local, package);
fs::create_dir_all(&tardir)?;
self.fetch(package)?.install(&tardir)?;
Ok(tardir)
}
pub fn add_remote(&mut self, remote: &str) {
self.remotes.push(remote.to_string());
}
}