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Protoplugin example

This example shows how to write a custom plugin. It generates Twirp clients from service definitions in Protobuf files.

Run the example

You need Node version 20.17.0 or later installed. Download the example project and install its dependencies:

curl -L https://github.com/bufbuild/protobuf-es/archive/refs/heads/main.zip > protobuf-es-main.zip
unzip protobuf-es-main.zip 'protobuf-es-main/packages/protoplugin-example/*'

cd protobuf-es-main/packages/protoplugin-example
npm install

To see the client in action:

npm start

Open http://127.0.0.1:3000/ in your browser.

To re-generate code:

npx buf generate

Test the generated code:

npm test

About this example

This example is a starting point—we encourage you to try it out and experiment.

Take a look at the code generation logic in protoc-gen-twirp-es.ts, and at buf.gen.yaml to see how it's invoked. To learn more, see our guide for writing plugins.