Protocol Buffers - Google's data interchange format (grpc依赖) https://developers.google.com/protocol-buffers/
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README.md

Build scripts that publish pre-compiled protoc artifacts

protoc is the compiler for .proto files. It generates language bindings for the messages and/or RPC services from .proto files.

Because protoc is a native executable, the scripts under this directory build and publish a protoc executable (a.k.a. artifact) to Maven repositories. The artifact can be used by build automation tools so that users would not need to compile and install protoc for their systems.

If you would like us to publish protoc artifact for a new platform, please send us a pull request to add support for the new platform. You would need to change the following files:

  • build-protoc.sh: script to cross-build the protoc for your platform.
  • pom.xml: script to upload artifacts to maven.
  • build-zip.sh: script to package published maven artifacts in our release page.

Maven Location

The published protoc artifacts are available on Maven here:

http://central.maven.org/maven2/com/google/protobuf/protoc/

Versioning

The version of the protoc artifact must be the same as the version of the Protobuf project.

Artifact name

The name of a published protoc artifact is in the following format: protoc-<version>-<os>-<arch>.exe, e.g., protoc-3.6.1-linux-x86_64.exe.

Note that artifacts for linux/macos also have the .exe suffix but they are not windows binaries.

System requirement

Install Apache Maven if you don't have it.

The scripts only work under Unix-like environments, e.g., Linux, MacOSX, and Cygwin or MinGW for Windows. Please see README.md of the Protobuf project for how to set up the build environment.

Building from a freshly checked-out source

If you just checked out the Protobuf source from github, you need to generate the configure script.

Under the protobuf project directory:

$ ./autogen.sh

Build the artifact for each platform

Run the build-protoc.sh script under this protoc-artifacts directory to build the protoc artifact for each platform. For example:

$ cd protoc-artifacts
$ ./build-protoc.sh linux x86_64 protoc

The above command will produce a target/linux/x86_64/protoc binary under the protoc-artifacts directory.

For a list of supported platforms, see the comments in the build-protoc.sh script. We only use this script to build artifacts on Ubuntu and MacOS (both with x86_64, and do cross-compilation for other platforms.

Tips for building for Linux

We build on Centos 6.9 to provide a good compatibility for not very new systems. We have provided a Dockerfile under this directory to build the environment. It has been tested with Docker 1.6.1.

To build a image:

$ docker build -t protoc-artifacts .

To run the image:

$ docker run -it --rm=true protoc-artifacts bash

To checkout protobuf (run within the container):

$ # Replace v3.5.1 with the version you want
$ wget -O - https://github.com/protocolbuffers/protobuf/archive/v3.5.1.tar.gz | tar xvzp

Windows build

We no longer use scripts in this directory to build windows artifacts. Instead, we use Visual Studio 2015 to build our windows release artifacts. See our kokoro windows build scripts here.

To upload windows artifacts, copy the built binaries into this directory and put it into the target/windows/(x86_64|x86_32) directory the same way as the artifacts for other platforms. That will allow the maven script to find and upload the artifacts to maven.

To push artifacts to Maven Central

Before you can upload artifacts to Maven Central repository, make sure you have read this page on how to configure GPG and Sonatype account.

Before you do the deployment, make sure you have built the protoc artifacts for every supported platform and put them under the target directory. Example target directory layout:

+ pom.xml
+ target
  + linux
    + x86_64
      protoc.exe
    + x86_32
      protoc.exe
    + aarch_64
      protoc.exe
    + ppcle_64
      protoc.exe
    + s390x_64
      protoc.exe
  + osx
    + x86_64
      protoc.exe
    + x86_32
      protoc.exe
  + windows
    + x86_64
      protoc.exe
    + x86_32
      protoc.exe

You will need to build the artifacts on multiple machines and gather them together into one place.

Use the following command to deploy artifacts for the host platform to a staging repository.

$ mvn deploy -P release

It creates a new staging repository. Go to https://oss.sonatype.org/#stagingRepositories and find the repository, usually in the name like comgoogle-123. Verify that the staging repository has all the binaries, close and release this repository.

Upload zip packages to github release page.

After uploading protoc artifacts to Maven Central repository, run the build-zip.sh script to bulid zip packages for these protoc binaries and upload these zip packages to the download section of the github release. For example:

$ ./build-zip.sh protoc 3.6.0

The above command will create 7 zip files:

dist/protoc-3.6.0-win32.zip
dist/protoc-3.6.0-osx-x86_32.zip
dist/protoc-3.6.0-osx-x86_64.zip
dist/protoc-3.6.0-linux-x86_32.zip
dist/protoc-3.6.0-linux-x86_64.zip
dist/protoc-3.6.0-linux-aarch_64.zip
dist/protoc-3.6.0-linux-ppcle_64.zip
dist/protoc-3.6.0-linux-s390x_64.zip

Before running the script, make sure the artifacts are accessible from: http://repo1.maven.org/maven2/com/google/protobuf/protoc/

Tested build environments

We have successfully built artifacts on the following environments:

  • Linux x86_32 and x86_64:
    • Centos 6.9 (within Docker 1.6.1)
    • Ubuntu 14.04.5 64-bit
  • Linux aarch_64: Cross compiled with g++-aarch64-linux-gnu on Ubuntu 14.04.5 64-bit
  • Mac OS X x86_32 and x86_64: Mac OS X 10.9.5