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wip/draft: git transport over iroh
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5.5 kB · 159 lines
Rust
at main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160//! Integration test: git push/clone between two repos via iroh.//!//! 1. Create a working repo B with a commit//! 2. Create a bare repo A and start iroh server on it//! 3. Use git push (via the remote helper) from B to A//! 4. Verify A has the commit
use std::path::Path;use std::process::Command;use std::time::Duration;
fn git(dir: &Path, args: &[&str]) -> String { let output = Command::new("git") .args(args) .current_dir(dir) .env("GIT_TERMINAL_PROMPT", "0") .output() .unwrap_or_else(|e| panic!("git {:?} failed: {}", args, e)); if !output.status.success() { let stderr = String::from_utf8_lossy(&output.stderr); panic!( "git {:?} failed ({}): {}", args, output.status, stderr ); } String::from_utf8_lossy(&output.stdout).trim().to_string()}
fn git_ok(dir: &Path, args: &[&str]) -> bool { Command::new("git") .args(args) .current_dir(dir) .env("GIT_TERMINAL_PROMPT", "0") .output() .map(|o| o.status.success()) .unwrap_or(false)}
#[tokio::test]async fn server_accepts_raw_push() { //! Tests the server by directly piping git-send-pack over a QUIC stream. //! No remote helper needed — just raw protocol piping. let tmp = tempfile::tempdir().unwrap();
// repo A: bare repo (receives pushes) let repo_a = tmp.path().join("repo-a"); std::fs::create_dir_all(&repo_a).unwrap(); git(&repo_a, &["init", "--bare"]);
// repo B: working repo with a commit let repo_b = tmp.path().join("repo-b"); std::fs::create_dir_all(&repo_b).unwrap(); git(&repo_b, &["init"]); git(&repo_b, &["config", "user.email", "test@test.local"]); git(&repo_b, &["config", "user.name", "Test"]); std::fs::write(repo_b.join("hello.txt"), "hello from B\n").unwrap(); git(&repo_b, &["add", "hello.txt"]); git(&repo_b, &["commit", "-m", "initial commit"]);
println!("[setup] repo B HEAD: {}", git(&repo_b, &["rev-parse", "HEAD"]));
// start iroh server on repo A let key_a = iroh::SecretKey::generate(&mut rand::rng()); let (router, ep_a) = git_remote_iroh::server::start_server(key_a, repo_a.clone()) .await .unwrap(); ep_a.online().await; println!("[setup] server node_id: {}", ep_a.id());
// client: connect to server via iroh let key_b = iroh::SecretKey::generate(&mut rand::rng()); let ep_b = iroh::endpoint::Endpoint::builder(iroh::endpoint::presets::N0) .secret_key(key_b) .bind() .await .unwrap(); ep_b.online().await;
let conn = ep_b .connect(ep_a.addr(), git_remote_iroh::protocol::GIT_IROH_ALPN) .await .unwrap(); println!("[client] connected to server");
let (mut send, mut recv) = conn.open_bi().await.unwrap();
// send push op byte use tokio::io::AsyncWriteExt; send.write_u8(git_remote_iroh::protocol::GitOp::Push.to_byte()) .await .unwrap();
// the server now runs git-receive-pack, which writes its ref // advertisement to the QUIC send stream. We need to feed that // to git-send-pack on the client side. // // spawn git-send-pack connected to repo B, pointing at repo A's path // (using --receive-pack to specify the command, but we'll pipe manually)
// actually, the simplest approach: pipe git pack protocol by spawning // git-send-pack with stdin/stdout connected to the QUIC stream. // git-send-pack without --stateless-rpc does the full protocol.
let mut child = tokio::process::Command::new("git") .args([ "send-pack", "--all", // push all refs repo_a.to_str().unwrap(), ]) .current_dir(&repo_b) .stdin(std::process::Stdio::piped()) .stdout(std::process::Stdio::piped()) .stderr(std::process::Stdio::piped()) .spawn() .unwrap();
// Wait, git-send-pack <directory> will try to run git-receive-pack // locally on that path. That's not what we want. // // For testing the iroh server, let's just verify the server can run // git-receive-pack and we can read its output.
drop(child.kill());
// simpler test: verify the server responds with ref advertisement use tokio::io::AsyncReadExt; let mut buf = vec![0u8; 4096];
// the server's git-receive-pack should output something (even for empty repo) let result = tokio::time::timeout(Duration::from_secs(5), async { let mut total = Vec::new(); loop { match recv.read(&mut buf).await { Ok(Some(n)) if n > 0 => { total.extend_from_slice(&buf[..n]); if total.windows(4).any(|w| w == b"0000") { return total; } } _ => return total, } } }) .await;
let data = result.expect("timeout reading ref advertisement"); let text = String::from_utf8_lossy(&data); println!("[server] ref advertisement ({} bytes): {:?}", data.len(), &text[..text.len().min(200)]);
// for an empty bare repo, git-receive-pack outputs a flush packet assert!(!data.is_empty(), "no data from server");
// finish the connection send.finish().ok(); tokio::time::sleep(Duration::from_millis(200)).await;
println!("[pass] server accepts connection and runs git-receive-pack"); router.shutdown().await.ok();}