protoc-plugin-common

protoc-plugin-common is a module containing a framework for protobuf compiler plugin creation.

The meat of the framework is an abstract class - ProtocPluginCodeGenerator - which can be extended by specific plugins to generate code for enums, messages, and services. If you want to create a protobuf compiler plugin you need to do:

1. Extend ProtocPluginCodeGenerator (e.g. MyPluginCodeGenerator) and fill in the methods.
2. Create a Main class and call: new MyPluginCodeGenerator().generate()

The relevant files are:

• Registry, which keeps track of processed messages, enums, and services and allows accessing their descriptors by name.
• *Descriptor classes, which wrap around the *DescriptorProto classes to provide some additional information and utility methods.
• FileDescriptorProcessingContext, which keeps track of the traversal through each .proto (we need this mainly to find comments).
• ProtocPluginCodeGenerator, which has some methods to actually go through the whole generation process.