node: Start working on git-fetch

Signed-off-by: Alexis Sellier <self@cloudhead.io>

node/src/git.rs

@@ -0,0 +1,24 @@
+use std::net;
+
+use crate::identity::ProjId;
+use crate::storage::{Error, WriteStorage};
+
+/// Default port of the `git` transport protocol.
+pub const PROTOCOL_PORT: u16 = 9418;
+
+pub fn fetch<S: WriteStorage>(
+    _proj: &ProjId,
+    remote: &net::SocketAddr,
+    mut storage: S,
+) -> Result<(), Error> {
+    let _repo = storage.repository();
+
+    let url = format!("git://{}", remote);
+    let refs: &[&str] = &[];
+    let mut remote = git2::Remote::create_detached(&url)?;
+    let mut opts = git2::FetchOptions::default();
+
+    remote.fetch(refs, Some(&mut opts), None)?;
+
+    Ok(())
+}