protobuf/protoc-artifacts

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.

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-3.0.0-alpha-3-windows-x86_64.exe.

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.

To install artifacts locally

The following command will install the protoc artifact to your local Maven repository.

$ mvn install

Cross-compilation

The Maven script will try to detect the OS and the architecture from Java system properties. It's possible to build a protoc binary for an architecture that is different from what Java has detected, as long as you have the proper compilers installed.

You can override the Maven properties os.detected.name and os.detected.arch to force the script to generate binaries for a specific OS and/or architecture. Valid values are defined as the return values of normalizeOs() and normalizeArch() of Detector from os-maven-plugin. Frequently used values are:

• os.detected.name: linux, osx, windows.
• os.detected.arch: x86_32, x86_64

For example, MingGW32 only ships with 32-bit compilers, but you can still build 32-bit protoc under 64-bit Windows, with the following command:

$ mvn install -Dos.detected.arch=x86_32

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.

Use the following command to upload artifacts:

$ mvn clean deploy -P release