protoc-gen-gotemplate

📂 protocol generator + golang text/template (protobuf)

Generic protocol buffer generator backed by Golang's text/template.

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This is a generator plugin for the Google Protocol Buffers compiler (protoc).

The plugin can generate files based on a template directory using the Golang's text/template engine.

Usage

protoc-gen-gotemplate requires a template_dir directory (by default ./templates).

Every files ending with .tmpl will be processed and written in the destination folder, following the file hierarchy of the template_dir, and removing the .tmpl extension.

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$> ls -R
input.proto     templates/doc.txt.tmpl      templates/config.json.tmpl
$> protoc --gotemplate_out=. input.proto
$> ls -R
input.proto     templates/doc.txt.tmpl      templates/config.json.tmpl
doc.txt         config.json

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You can specify a custom template_dir or enable debug:

$> protoc --gotemplate_out=debug=true,template_dir=/path/to/template/directory:. input.proto

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See examples.

Funcmap

This project uses Masterminds/sprig library and additional functions to extend the builtin text/template helpers.

Non-exhaustive list of new helpers:

• all the functions from sprig
• json
• prettyjson
• first
• last

See the project helpers for the complete list.

Install

• Install the Go compiler and tools from https://golang.org/doc/install
• Install protobuf: go get -u github.com/golang/protobuf/{proto,protoc-gen-go}
• Install protoc-gen-gotemplate: go get -u github.com/moul/protoc-gen-gotemplate

Projects using protoc-gen-gotemplate

• kafka-gateway: Kafka gateway/proxy (gRPC + http) using Go-Kit
• translator: Translator Micro-service using Gettext and Go-Kit

License

MIT