feat(tvix/store): Support listening on UNIX domain sockets r/6653

This adds support for listening on UNIX domain sockets via the
tokio-listener crate. The crate will automatically determine whether to
start a TCP or UNIX domain socket server based on the listen address.

Unfortunately, it's not compatible with tonic right out of the box so I
added some wrapper types to implement the necessary traits to make
things work. We should investigate upstreaming a `tonic` option to the
tokio-listener crate which implements the relevant `tonic` traits.

Example:
```
$ tvix-store daemon -l /run/tvix-store.sock
INFO tvix_store: tvix-store listening on /run/tvix-store.sock

$ tvix-store mount -l /mnt/tvix --blob-service-addr grpc+unix:///run/tvix-store.sock --directory-service-addr grpc+unix:///run/tvix-store.sock --path-info-service-addr grpc+unix:///run/tvix-store.sock

$ ls /mnt/tvix
```

Change-Id: I91c4a4b0c5a177b3b90e6c01a4e5d263130e6bdb
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9429
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
Reviewed-by: raitobezarius <tvl@lahfa.xyz>

1 files changed, 1 insertions, 0 deletions

diff --git a/tvix/store/src/lib.rs b/tvix/store/src/lib.rs
index c59121453352..c988e147174b 100644
--- a/tvix/store/src/lib.rs
+++ b/tvix/store/src/lib.rs
@@ -1,6 +1,7 @@
 #[cfg(feature = "fs")]
 pub mod fs;
 
+pub mod listener;
 pub mod nar;
 pub mod pathinfoservice;
 pub mod proto;