protobuf-preloader

Webpack loader to translate protobuf definitions to ProtoBuf.js modules. Equivalent to running your definitions through the pbjs CLI.

This allows you to use the light or minimal ProtoBuf.js distributions without an explicit compile step in your build pipeline.

Install

npm install --save-dev protobufjs-loader-webpack4

Usage

// webpack.config.js
 
module.exports = {
    ...
    module: {
        rules: [{
            test: /\.proto$/,
            use: {
              loader: 'protobuf-preloader',
              options: {
                /* controls the "target" flag to pbjs - true for
                 * json-module, false for static-module.
                 * default: false
                 */
                json: true,
                
                /* import paths provided to pbjs.
                 * default: webpack import paths (i.e. config.resolve.modules)
                 */
                paths: ['/path/to/definitions'],
                
                /* additional command line arguments passed to
                 * pbjs, see https://github.com/dcodeIO/ProtoBuf.js/#pbjs-for-javascript
                 * for a list of what's available.
                 * default: []
                 */
                pbjsArgs: ['--no-encode']
              }
            }
        }]
    }
};

// myModule.js
 
/* replaces e.g.:
 * 
 *   const protobuf = require('protobufjs/light');
 *   const jsonDescriptor = require('json!my/compiled/protobuf.js');
 *   const Root = protobuf.Root.fromJSON(jsonDescriptor);
 */
const Root = require('my/protobuf.proto');