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|
// SPDX-FileCopyrightText: V <v@unfathomable.blue>
// SPDX-License-Identifier: OSL-3.0
use {
anyhow::{anyhow, Error, Result},
git2::{Oid, Repository, Sort},
irc::client::prelude::*,
pin_utils::pin_mut,
std::{env, fs::remove_file, io::ErrorKind},
tokio::{
io::{AsyncBufRead, AsyncBufReadExt, BufReader, Lines},
net::UnixListener,
select, spawn,
sync::{mpsc, mpsc::UnboundedSender},
},
tokio_stream::{wrappers::UnboundedReceiverStream, StreamExt},
};
#[derive(Debug)]
struct Batch {
lines: Vec<String>,
}
#[tokio::main]
async fn main() -> Result<()> {
let (tx, rx) = mpsc::unbounded_channel::<Batch>();
let listener = bind(env::var("NAUT_SOCK")?.as_str())?;
spawn(async move {
loop {
let (stream, _) = listener.accept().await.unwrap();
let tx = tx.clone();
let conn = async move {
let lines = BufReader::new(stream).lines();
let repo = Repository::open("/var/lib/git/basin")?;
handle(repo, lines, tx).await?;
Ok::<(), Error>(())
};
spawn(async move {
if let Err(e) = conn.await {
eprintln!("Failed to handle request: {e}");
}
});
}
});
let channel = "#ripple";
let client_config = Config {
server: Some("irc.libera.chat".to_owned()),
password: Some(env::var("NAUT_PASS")?),
nickname: Some("naut".to_owned()),
realname: Some("blub blub".to_owned()),
version: Some(format!("naut {}", env!("CARGO_PKG_VERSION"))),
source: Some("https://src.unfathomable.blue/tree/fleet/pkgs/naut".to_owned()),
channels: vec![channel.to_owned()],
..Default::default()
};
let rx = UnboundedReceiverStream::new(rx).fuse();
pin_mut!(rx);
loop {
let mut client = Client::from_config(client_config.clone()).await?;
client.identify()?;
let sender = client.sender();
let stream = client.stream()?.fuse();
pin_mut!(stream);
loop {
select! {
message = stream.next() => match message {
Some(_) => {},
None => break,
},
Some(batch) = rx.next() => {
for line in batch.lines {
sender.send_privmsg("#ripple", line.to_owned())?;
}
},
}
}
}
}
fn bind(path: &str) -> Result<UnixListener> {
match remove_file(path) {
Ok(()) => (),
Err(e) if e.kind() == ErrorKind::NotFound => (),
Err(e) => return Err(e.into()),
}
UnixListener::bind(path).map_err(Error::from)
}
async fn handle(
repo: Repository,
mut lines: Lines<impl AsyncBufRead + Unpin>,
tx: UnboundedSender<Batch>,
) -> Result<()> {
while let Some(line) = lines.next_line().await? {
let args: Vec<_> = line.splitn(3, ' ').collect();
let old = Oid::from_str(args[0])?;
let new = Oid::from_str(args[1])?;
let r#ref = repo.find_reference(args[2])?;
let ref_name = r#ref.shorthand().unwrap();
let mut lines = vec![];
if r#ref.is_branch() {
if new.is_zero() {
lines.push(format!("branch {ref_name} deleted (was {old})"));
} else {
let mut walker = repo.revwalk()?;
walker.set_sorting(Sort::REVERSE)?;
walker.push(new)?;
if old.is_zero() {
lines.push(format!("new branch created: {ref_name}"));
// We cannot use repo.head directly, as that comes resolved already.
let head = repo.find_reference("HEAD")?;
// Hide commits also present from HEAD (unless this *is* HEAD, in which we do want them).
// This avoids duplicating notifications for commits that we've already seen, provided we
// only push branches that are forked directly from HEAD (or one of its ancestors).
if ref_name != head.symbolic_target().unwrap() {
if let Ok(base) = repo.merge_base(head.resolve()?.target().unwrap(), new) {
walker.hide(base)?;
}
}
} else {
walker.hide(old)?;
}
let commits: Vec<_> = walker
.map(|x| repo.find_commit(x.unwrap()).unwrap())
.filter(|c| {
// TODO(edef): we need a saner model here
// history that doesn't descend from the monorepo root shouldn't make it here at all
c.parents()
.next()
.map(|parent| {
let t1 = parent.tree().unwrap().get_name("ripple").map(|e| e.id());
let t2 = c.tree().unwrap().get_name("ripple").map(|e| e.id());
t1 != t2
})
.unwrap_or_default()
})
.collect();
if !commits.is_empty() {
lines.push(format!(
"{} {} pushed to {ref_name}",
commits.len(),
if commits.len() == 1 {
"commit"
} else {
"commits"
},
));
for commit in commits {
lines.push(format!(
" {} \"{}\" by {}",
commit.as_object().short_id()?.as_str().unwrap(),
commit.summary().unwrap(),
commit.author().name().unwrap()
));
}
}
}
} else if r#ref.is_tag() {
lines.push(if new.is_zero() {
format!("tag {ref_name} deleted (was {old})")
} else if old.is_zero() {
format!("commit {new} tagged as {ref_name}")
} else {
format!("tag {ref_name} modified (was {old}, now {new})")
});
} else {
return Err(anyhow!(
"Received a reference that's neither a branch nor tag: {}",
args[2]
));
}
tx.send(Batch { lines })?;
}
Ok(())
}
|
