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next.js/server/build/babel/find-config-location.js
Arunoda Susiripala 57e9a5e5f6 Find custom babel config location properly. (#969)
* Find custom babel config location properly.
Earlier we simply check for the .bablerc file in the dir.
But the actual logic is much complex.
Now we are using the babel's actual logic to find the
custom config location.

* Fix failing tests.
2017-02-03 14:33:35 +09:00

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JavaScript

import { join } from 'path'
import buildConfigChain from 'babel-core/lib/transformation/file/options/build-config-chain'
export default function findBabelConfigLocation (dir) {
// We need to provide a location of a filename inside the `dir`.
// For the name of the file, we could be provide anything.
const filename = join(dir, 'filename.js')
const options = { babelrc: true, filename }
// First We need to build the config chain.
// Then we need to remove the config item with the location as "base".
// That's the config we are passing as the "options" below
const configList = buildConfigChain(options).filter(i => i.loc !== 'base')
return configList[0] ? configList[0].loc : null
}