pass collection path into backend

anki/backend.py

@@ -42,8 +42,8 @@ def proto_template_reqs_to_legacy(
 
 
 class Backend:
-    def __init__(self):
+    def __init__(self, path: str):
-        self._backend = _ankirs.Backend()
+        self._backend = _ankirs.Backend(path)
 
     def _run_command(self, input: pb.BackendInput) -> pb.BackendOutput:
         input_bytes = input.SerializeToString()

anki/storage.py

@@ -30,7 +30,7 @@ def Collection(
     path: str, lock: bool = True, server: Optional[ServerData] = None, log: bool = False
 ) -> _Collection:
     "Open a new or existing collection. Path must be unicode."
-    backend = Backend()
+    backend = Backend(path)
     # fixme: this call is temporarily here to ensure the brige is working
     # on all platforms, and should be removed in a future beta
     assert backend.plus_one(5) == 6

rs/ankirs/src/backend.rs

@@ -5,13 +5,11 @@ use crate::sched::sched_timing_today;
 use crate::template::{FieldMap, FieldRequirements, ParsedTemplate};
 use prost::Message;
 use std::collections::HashSet;
+use std::path::PathBuf;
 
-pub struct Backend {}
+pub struct Backend {
-
+    #[allow(dead_code)]
-impl Default for Backend {
+    path: PathBuf,
-    fn default() -> Self {
-        Backend {}
-    }
 }
 
 /// Convert an Anki error to a protobuf error.
@@ -37,8 +35,8 @@ impl std::convert::From<AnkiError> for pt::backend_output::Value {
 }
 
 impl Backend {
-    pub fn new() -> Backend {
+    pub fn new<P: Into<PathBuf>>(path: P) -> Backend {
-        Backend::default()
+        Backend { path: path.into() }
     }
 
     /// Decode a request, process it, and return the encoded result.

rs/pymod/src/lib.rs

@@ -10,10 +10,10 @@ struct Backend {
 #[pymethods]
 impl Backend {
     #[new]
-    fn init(obj: &PyRawObject) {
+    fn init(obj: &PyRawObject, path: String) {
         obj.init({
             Backend {
-                backend: Default::default(),
+                backend: RustBackend::new(path),
             }
         });
     }