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next.js/server/build/plugins/pages-plugin.js

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import {
IS_BUNDLED_PAGE,
MATCH_ROUTE_NAME
} from '../../utils'
export default class PagesPlugin {
apply (compiler) {
compiler.plugin('after-compile', (compilation, callback) => {
const pages = Object
.keys(compilation.namedChunks)
.map(key => compilation.namedChunks[key])
.filter(chunk => IS_BUNDLED_PAGE.test(chunk.name))
pages.forEach((chunk) => {
const page = compilation.assets[chunk.name]
const pageName = MATCH_ROUTE_NAME.exec(chunk.name)[1]
let routeName = pageName
// We need to convert \ into / when we are in windows
// to get the proper route name
// Here we need to do windows check because it's possible
// to have "\" in the filename in unix.
// Anyway if someone did that, he'll be having issues here.
// But that's something we cannot avoid.
if (/^win/.test(process.platform)) {
routeName = routeName.replace(/\\/g, '/')
}
routeName = `/${routeName.replace(/(^|\/)index$/, '')}`
const content = page.source()
const newContent = `
window.__NEXT_REGISTER_PAGE('${routeName}', function() {
var comp = ${content}
return { page: comp.default }
})
`
// Replace the exisiting chunk with the new content
compilation.assets[chunk.name] = {
source: () => newContent,
size: () => newContent.length
}
})
callback()
})
}
}