storage-proto: Rework source generation (backport #18577)

storage-proto/README.md

@@ -2,4 +2,4 @@
 
 The `solana-storage-proto` structs used in `src/convert.rs` and elsewhere are
 auto-generated from protobuf definitions on build. To update these structs,
-simply make the desired edits to `src/*.proto` files.
+simply make the desired edits to `proto/*.proto` files.

storage-proto/build.rs

@@ -1,24 +1,16 @@
 fn main() -> Result<(), std::io::Error> {
-    let manifest_dir = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"));
-
-    let out_dir = manifest_dir.join("proto");
-    let proto_files = manifest_dir.join("src");
-
-    std::fs::create_dir_all(out_dir.clone())?;
-
-    println!("Protobuf directory: {}", proto_files.display());
-    println!("output directory: {}", out_dir.display());
+    let proto_base_path = std::path::PathBuf::from("proto");
+    let proto_files = ["confirmed_block.proto", "transaction_by_addr.proto"];
+    let mut protos = Vec::new();
+    for proto_file in &proto_files {
+        let proto = proto_base_path.join(proto_file);
+        println!("cargo::rerun-if-changed={}", proto.display());
+        protos.push(proto);
+    }
 
     tonic_build::configure()
         .build_client(true)
         .build_server(false)
         .format(true)
-        .out_dir(&out_dir)
-        .compile(
-            &[
-                proto_files.join("confirmed_block.proto"),
-                proto_files.join("transaction_by_addr.proto"),
-            ],
-            &[proto_files],
-        )
+        .compile(&protos, &[proto_base_path])
 }

storage-proto/src/convert.rs

@@ -23,15 +23,15 @@ use {
 
 pub mod generated {
     include!(concat!(
-        env!("CARGO_MANIFEST_DIR"),
-        concat!("/proto/solana.storage.confirmed_block.rs")
+        env!("OUT_DIR"),
+        "/solana.storage.confirmed_block.rs"
     ));
 }
 
 pub mod tx_by_addr {
     include!(concat!(
-        env!("CARGO_MANIFEST_DIR"),
-        concat!("/proto/solana.storage.transaction_by_addr.rs")
+        env!("OUT_DIR"),
+        "/solana.storage.transaction_by_addr.rs"
     ));
 }