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authorFlorian Klink <flokli@flokli.de>2023-01-29T19·48+0100
committerflokli <flokli@flokli.de>2023-01-31T15·28+0000
commit0db73cb2bd94ce2449571b5707de35b283da0091 (patch)
tree01403c551647dc6567edf0085fa3128092a9e075 /tvix/store/src/client.rs
parenta23b7e17c04453a4d5ea2d47a88c6c6874471c08 (diff)
feat(tvix/store): add write_nar function r/5794
This adds a function that consumes a [proto::node::Node] pointing to the
root of a (store) path, and writes the contents in NAR serialization to
the passed [std::io::Write].

We need this in various places:

 - tvix-store's calculate_nar() RPC method needs to render a NAR stream
   to get the nar hash, which is necessary to give things imported in
   the store a "NAR-based" store path.

 - communication with (remote) Nix (via daemon protocol) needs a NAR
   representation.

 - Things like nar-bridge, exposing a NAR/NARInfo HTTP interface need a
   NAR representation.

Change-Id: I7fb2e0bf01814a1c09094c0e35394d9d6b3e43b6
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7956
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Diffstat (limited to 'tvix/store/src/client.rs')
-rw-r--r--tvix/store/src/client.rs10
1 files changed, 10 insertions, 0 deletions
diff --git a/tvix/store/src/client.rs b/tvix/store/src/client.rs
new file mode 100644
index 000000000000..3b282eacdd70
--- /dev/null
+++ b/tvix/store/src/client.rs
@@ -0,0 +1,10 @@
+use crate::proto::Directory;
+
+pub trait StoreClient {
+    fn open_blob(&self, digest: Vec<u8>) -> std::io::Result<Box<dyn std::io::BufRead>>;
+
+    // TODO: stat_blob, put_blob?
+    fn get_directory(&self, digest: Vec<u8>) -> std::io::Result<Option<Directory>>;
+
+    // TODO: put_directory
+}