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// SPDX-FileCopyrightText: edef <edef@unfathomable.blue>
// SPDX-License-Identifier: OSL-3.0
use {
clap::StructOpt,
fossil::{store, Directory},
prost::Message,
std::{
fs,
io::Write,
os::unix::{fs::symlink, prelude::OpenOptionsExt},
path::{Path, PathBuf},
},
};
#[derive(clap::Parser)]
struct Args {
#[clap(long, default_value = "fossil.db")]
store: PathBuf,
#[clap(parse(try_from_str = fossil::digest_from_str))]
root: fossil::Digest,
}
fn main() {
let args = Args::parse();
let store = fossil::Store::open(args.store).unwrap();
let root = {
let bytes = store.read_blob(args.root).expect("blob not found");
let pb = store::Directory::decode(&*bytes).unwrap();
Directory::from_pb(pb)
};
let root_path = Path::new(".");
extract(&store, root_path, &root);
}
fn extract(store: &fossil::Store, path: &Path, dir: &Directory) {
for (name, node) in &dir.children {
let path = path.join(name);
match node.clone() {
fossil::Node::Directory(fossil::DirectoryRef { ident, size: _ }) => {
let blob = store.read_blob(ident).expect("blob not found");
let pb = store::Directory::decode(&*blob).unwrap();
fs::create_dir(&path).unwrap();
extract(store, &path, &Directory::from_pb(pb));
}
fossil::Node::File(fossil::FileRef {
ident,
executable,
size: _,
}) => {
let mode = if executable { 0o755 } else { 0o644 };
let mut f = fs::OpenOptions::new()
.write(true)
.create_new(true)
.mode(mode)
.open(path)
.unwrap();
let blob = store.read_blob(ident).expect("blob not found");
f.write_all(&blob).unwrap();
}
fossil::Node::Link { target } => {
symlink(target, path).unwrap();
}
}
}
}
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