grpcio: pre-generate bindings for common targets

.travis.yml

@@ -3,14 +3,6 @@ sudo: false
 language: rust
 git:
   submodules: false
-cache:
-  directories:
-    - $HOME/.cargo
-    - $HOME/.cache
-    - $HOME/tools
-    - $TRAVIS_BUILD_DIR/target
-before_cache:
-  - find $TRAVIS_BUILD_DIR/target/debug -maxdepth 1 -type f -delete
 
 env:
   global:
@@ -60,6 +52,7 @@ matrix:
 
 addons:
   apt:
+    update: true
     sources:
       - llvm-toolchain-xenial-7
     packages:
@@ -100,6 +93,7 @@ before_script:
 script:
   - if [[ $TRAVIS_OS_NAME == "linux" ]] && [[ $TRAVIS_RUST_VERSION == "stable" ]]; then
       rustup component add rustfmt && cargo fmt --all -- --check;
+      scripts/generate-bindings.sh && git diff --exit-code HEAD;
     fi
   - if [[ $TRAVIS_OS_NAME == "linux" ]]; then scripts/lint-grpc-sys.sh && git diff-index --quiet HEAD; fi
   - if [[ $TRAVIS_RUST_VERSION == "stable" ]]; then rustup component add clippy && cargo clippy --all -- -D clippy::all && cargo clippy --all --no-default-features --features prost-codec -- -D clippy::all; fi

README.md

@@ -27,11 +27,13 @@ This project is still under development. The following features with the check m
 - CMake >= 3.8.0
 - Rust >= 1.19.0
 - binutils >= 2.22
-- LLVM and Clang >= 3.9 recommended by bindgen
-- By default, the [secure feature](#feature-secure) is enabled, therefore Go (>=1.7) is required.
+- LLVM and Clang >= 3.9 if you need to generate bindings at compile time.
+- By default, the [secure feature](#feature-secure) is provided by boringssl, which requires Go (>=1.7) to build. You can also use openssl instead by enabling [openssl feature](#feature-openssl).
 
 For Linux and MacOS, you also need to install gcc (or clang) too.
 
+Bindings are pre-generated for x86_64 Linux. For other platforms, bindings are generated at compile time.
+
 For Windows, you also need to install following software:
 
 - Active State Perl
@@ -41,7 +43,7 @@ For Windows, you also need to install following software:
 ## Build
 
 ```
-$ git submodule update --init --recursive # if you just cloned the repository
+$ ./scripts/reset-submodule.cmd # if you just cloned the repository
 $ cargo build
 ```
 
@@ -113,11 +115,21 @@ your `Cargo.toml`'s features list for `gprcio`. E.g.:
 grpcio = { version = "0.4.4", features = ["openssl"] }
 ```
 
-
 ## Performance
 
 See [benchmark](https://github.com/pingcap/grpc-rs/tree/master/benchmark) to find out how to run a benchmark by yourself.
 
 Cross Compile
 -------------
 See [cross_compile](cross_compile.md)
+
+Contributing
+------------
+
+Make sure to format and test the code before sending a PR.
+
+If the content in grpc-sys/grpc is updated, you may need to regenerate bindings:
+
+```
+$ ./scripts/generate-bindings.sh
+```

grpc-sys/Cargo.toml

@@ -62,4 +62,4 @@ cc = "1.0"
 cmake = "0.1.40"
 pkg-config = "0.3"
 walkdir = "2.2.9"
-bindgen = { version = "0.50.0", default-features = false }
+bindgen = { version = "0.51.0", default-features = false }