expose buildId to custom webpack configs #3001
Merged
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It's useful to have the buildId in the custom webpack configuration.
Our specific use case is that we're using https://github.com/jmshal/webpack-bugsnag-plugin to automatically upload our sourcemap to bugsnag on build. To do that, we need to provide an "appVersion" (buildId basically), and that "appVersion" needs to be the same value that we provide to the bugsnag library when we initialize it on app start (we do this in _document.js). We are already using buildId in to initialize bugsnag on app start, so this would tie the two together and allow us to connect source maps with specific production builds.
I'm sure there are other use cases as well!