Merge branch 'master' into jsdw-subxt-new

subxt/src/lib.rs

@@ -146,6 +146,15 @@ pub mod ext {
 /// mod polkadot {}
 /// ```
 ///
+/// You can use the `$OUT_DIR` placeholder in the path to reference metadata generated at build time:
+///
+/// ```rust,ignore
+/// #[subxt::subxt(
+///     runtime_metadata_path = "$OUT_DIR/metadata.scale",
+/// )]
+/// mod polkadot {}
+/// ```
+///
 /// ## Using a WASM runtime via `runtime_path = "..."`
 ///
 /// This requires the `runtime-wasm-path` feature flag.
@@ -159,6 +168,15 @@ pub mod ext {
 /// mod polkadot {}
 /// ```
 ///
+/// You can also use the `$OUT_DIR` placeholder in the path to reference WASM files generated at build time:
+///
+/// ```rust,ignore
+/// #[subxt::subxt(
+///     runtime_path = "$OUT_DIR/runtime.wasm",
+/// )]
+/// mod polkadot {}
+/// ```
+///
 /// ## Connecting to a node to download metadata via `runtime_metadata_insecure_url = "..."`
 ///
 /// This will, at compile time, connect to the JSON-RPC interface for some node at the URL given,