*: support rust-protobuf

Signed-off-by: Ping Yu <yuping@pingcap.com>

Cargo.toml

@@ -9,10 +9,12 @@ description = "The Rust language implementation of TiKV client."
 edition = "2018"
 
 [features]
-default = []
+default = [ "protobuf-codec" ]
 # Enable integration tests with a running TiKV and PD instance.
 # Use $PD_ADDRS, comma separated, to set the addresses the tests use.
 integration-tests = []
+protobuf-codec = ["tikv-client-proto/protobuf-codec", "grpcio/protobuf-codec"]
+prost-codec = ["tikv-client-proto/prost-codec", "grpcio/prost-codec"]
 
 [lib]
 name = "tikv_client"
@@ -24,7 +26,7 @@ either = "1.6"
 fail = "0.4"
 futures = { version = "0.3", features = ["async-await", "thread-pool"] }
 futures-timer = "3.0"
-grpcio = { version = "0.10", features = [ "prost-codec", "openssl-vendored" ], default-features = false }
+grpcio = { version = "0.10", features = [ "openssl-vendored" ], default-features = false }
 lazy_static = "1"
 log = "0.4"
 prometheus = { version = "0.12", features = [ "push", "process" ], default-features = false } 
@@ -70,3 +72,8 @@ members = [
 name = "failpoint_tests"
 path = "tests/failpoint_tests.rs"
 required-features = ["fail/failpoints"]
+
+[patch.crates-io]
+raft-proto = { git = "https://github.com/tikv/raft-rs", rev="95c532612ee6a83591fce9a8b51d6afe87b58835"}
+protobuf-codegen = { git = "https://github.com/pingcap/rust-protobuf", rev="82b49fea7e696fd647b5aca0a6c6ec944eab3189" }
+protobuf = { git = "https://github.com/pingcap/rust-protobuf", rev="82b49fea7e696fd647b5aca0a6c6ec944eab3189" }

Makefile

@@ -2,21 +2,36 @@ export RUSTFLAGS=-Dwarnings
 
 .PHONY: default check unit-test integration-tests test doc docker-pd docker-kv docker all
 
+ENABLE_FEATURES ?=
+PD_ADDRS ?= "127.0.0.1:2379"
+MULTI_REGION ?= 1
+
+# Use Rust-protobuf instead of Prost to encode and decode protocol buffers.
+ifeq ($(RUST_PROTOBUF),1)
+ENABLE_FEATURES += protobuf-codec
+else
+ENABLE_FEATURES += prost-codec
+endif
+
+ALL_FEATURES := ${ENABLE_FEATURES} integration-tests
+
+INTEGRATION_TEST_ARGS := --no-default-features --features "${ENABLE_FEATURES} integration-tests"
+
 default: check
 
 check:
-	cargo check --all --all-targets --all-features
+	cargo check --all --all-targets --no-default-features --features "${ALL_FEATURES}"
 	cargo fmt -- --check
-	cargo clippy --all-targets --all-features -- -D clippy::all
+	cargo clippy --all-targets --no-default-features --features "${ALL_FEATURES}" -- -D clippy::all
 
 unit-test:
-	cargo test --all
+	cargo test --all --no-default-features --features "${ENABLE_FEATURES}"
 
 integration-test:
 # MULTI_REGION shall be set manually if needed
-	PD_ADDRS="127.0.0.1:2379" cargo test txn_ --all --features integration-tests -- --nocapture
-	PD_ADDRS="127.0.0.1:2379" cargo test raw_ --all --features integration-tests -- --nocapture
-	PD_ADDRS="127.0.0.1:2379" cargo test misc_ --all --features integration-tests -- --nocapture
+	cargo test txn_ --all ${INTEGRATION_TEST_ARGS} -- --nocapture
+	cargo test raw_ --all ${INTEGRATION_TEST_ARGS} -- --nocapture
+	cargo test misc_ --all ${INTEGRATION_TEST_ARGS} -- --nocapture
 
 test: unit-test integration-test
 
@@ -36,3 +51,7 @@ tiup:
 	tiup playground nightly --mode tikv-slim --kv 3 --without-monitor --kv.config $(shell pwd)/config/tikv.toml --pd.config $(shell pwd)/config/pd.toml &
 
 all: check doc test
+
+clean:
+	cargo clean
+	rm -rf target

tests/integration_tests.rs

@@ -596,9 +596,7 @@ async fn txn_pessimistic_rollback() -> Result<()> {
 #[serial]
 async fn txn_pessimistic_delete() -> Result<()> {
     init().await?;
-    let client =
-        TransactionClient::new_with_config(vec!["127.0.0.1:2379"], Default::default(), None)
-            .await?;
+    let client = TransactionClient::new_with_config(pd_addrs(), Default::default(), None).await?;
 
     // The transaction will lock the keys and must release the locks on commit,
     // even when values are not written to the DB.

tikv-client-proto/Cargo.toml

@@ -8,13 +8,18 @@ repository = "https://github.com/tikv/client-rust"
 description = "Protobuf specs for the TiKV Rust client"
 build = "build.rs"
 
+[features]
+protobuf-codec = ["protobuf-build/grpcio-protobuf-codec", "raft-proto/protobuf-codec", "grpcio/protobuf-codec"]
+prost-codec = ["prost", "prost-derive", "protobuf-build/grpcio-prost-codec", "grpcio/prost-codec", "raft-proto/prost-codec"]
+
 [build-dependencies]
-protobuf-build = { version = "0.13", default-features = false, features = ["grpcio-prost-codec"] }
+protobuf-build = { version = "0.13", default-features = false }
 
 [dependencies]
 protobuf = "2.8"
-prost = { version = "0.9" }
-prost-derive = { version = "0.9" }
+prost = { version = "0.9", optional = true }
+prost-derive = { version = "0.9", optional = true }
 futures = "0.3"
-grpcio = { version = "0.10", features = [ "prost-codec" ], default-features = false }
+grpcio = { version = "0.10", default-features = false }
 lazy_static = { version = "1" }
+raft-proto = { version = "0.7.0", default-features = false }

tikv-client-proto/build.rs

@@ -4,7 +4,7 @@ use protobuf_build::Builder;
 
 fn main() {
     Builder::new()
-        .search_dir_for_protos("./proto")
-        .includes(&["./include", "./proto"])
+        .search_dir_for_protos("proto")
+        .append_to_black_list("eraftpb")
         .generate()
 }

tikv-client-proto/src/lib.rs

@@ -1,10 +1,11 @@
 // Copyright 2020 TiKV Project Authors. Licensed under Apache-2.0.
 
-use protos::*;
-pub use protos::{coprocessor, errorpb, kvrpcpb, metapb, mpp, pdpb, raft_serverpb, tikvpb};
+pub use protos::*;
 
 #[allow(dead_code)]
 #[allow(clippy::all)]
 mod protos {
     include!(concat!(env!("OUT_DIR"), "/protos/mod.rs"));
+
+    use raft_proto::eraftpb;
 }