ci: Regenerate Rust code when we update dependencies

.github/workflows/CI.yaml

@@ -81,6 +81,11 @@ jobs:
       - name: Update dependencies
         run: cargo update
 
+      # Regenerate proto module with new dependencies. Else, they may not work
+      # if the protobuf library gets updated in the previous step.
+      - name: Generate Rust code from Protobuf definitions
+        run: cargo build --features proto-gen
+
       - name: Test
         run: cargo test -- --nocapture # Allow printing the output of tests
 

build.rs

@@ -5,6 +5,8 @@
 
 #[cfg(feature = "proto-gen")]
 use protobuf_codegen;
+#[cfg(feature = "proto-gen")]
+use std::fs;
 
 // NOTE: When this feature is enabled, the build will always run, even if the
 // .proto file has not changed. This happens because the .rs file always gets
@@ -16,7 +18,16 @@ fn proto_gen() {
         .out_dir("proto/")
         .includes(&["proto/"])
         .input("proto/metadata.proto")
-        .run_from_script()
+        .run_from_script();
+
+    // Allow missing docs for the generated code, since its not under our
+    // control.
+    let proto_mod_rs =
+        fs::read_to_string("proto/mod.rs").expect("Unable to open file");
+    let header = "// Header added by Tindercrypt's build.rs script\n\
+                  #![allow(missing_docs)]\n\n";
+    let new_proto_mod_rs = header.to_owned() + &proto_mod_rs;
+    fs::write("proto/mod.rs", new_proto_mod_rs).expect("Unable to write file");
 }
 
 fn main() {

proto/metadata.rs

@@ -1,4 +1,4 @@
-// This file is generated by rust-protobuf 3.6.0. Do not edit
+// This file is generated by rust-protobuf 3.7.1. Do not edit
 // .proto file is parsed by pure
 // @generated
 
@@ -22,7 +22,7 @@
 
 /// Generated files are compatible only with the same version
 /// of protobuf runtime.
-const _PROTOBUF_VERSION_CHECK: () = ::protobuf::VERSION_3_6_0;
+const _PROTOBUF_VERSION_CHECK: () = ::protobuf::VERSION_3_7_1;
 
 // @@protoc_insertion_point(message:metadata.KeyDerivationMetadata)
 #[derive(PartialEq,Clone,Default,Debug)]

proto/mod.rs

@@ -1,5 +1,6 @@
-// @generated
-
+// Header added by Tindercrypt's build.rs script
 #![allow(missing_docs)]
 
+// @generated
+
 pub mod metadata;