feat(tvix/store/pathinfosvc): provide listing r/6555

This provides an additional method in the PathInfoService trait, as
well as an RPC method on the gRPC layer to list all PathInfo objects in
a PathInfoService.

Change-Id: I7378f6bbd334bd6ac4e9be92505bd099a1c2b19a
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9216
Reviewed-by: tazjin <tazjin@tvl.su>
Autosubmit: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI

1 files changed, 25 insertions, 0 deletions

diff --git a/tvix/store/src/pathinfoservice/sled.rs b/tvix/store/src/pathinfoservice/sled.rs
index 2448b073c6..4f327626d1 100644
--- a/tvix/store/src/pathinfoservice/sled.rs
+++ b/tvix/store/src/pathinfoservice/sled.rs
@@ -136,6 +136,31 @@ impl PathInfoService for SledPathInfoService {
         )
         .map_err(|e| Error::StorageError(e.to_string()))
     }
+
+    fn list(&self) -> Box<dyn Iterator<Item = Result<proto::PathInfo, Error>> + Send> {
+        Box::new(self.db.iter().values().map(|v| match v {
+            Ok(data) => {
+                // we retrieved some bytes
+                match proto::PathInfo::decode(&*data) {
+                    Ok(path_info) => Ok(path_info),
+                    Err(e) => {
+                        warn!("failed to decode stored PathInfo: {}", e);
+                        Err(Error::StorageError(format!(
+                            "failed to decode stored PathInfo: {}",
+                            e
+                        )))
+                    }
+                }
+            }
+            Err(e) => {
+                warn!("failed to retrieve PathInfo: {}", e);
+                Err(Error::StorageError(format!(
+                    "failed to retrieve PathInfo: {}",
+                    e
+                )))
+            }
+        }))
+    }
 }
 
 #[cfg(test)]