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next.js/packages/next/server/require.js

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import {join, posix} from 'path'
import {PAGES_MANIFEST, SERVER_DIRECTORY} from '../lib/constants'
export function pageNotFoundError (page) {
const err = new Error(`Cannot find module for page: ${page}`)
err.code = 'ENOENT'
return err
}
export function normalizePagePath (page) {
// If the page is `/` we need to append `/index`, otherwise the returned directory root will be bundles instead of pages
if (page === '/') {
page = '/index'
}
// Resolve on anything that doesn't start with `/`
if (page[0] !== '/') {
page = `/${page}`
}
// Throw when using ../ etc in the pathname
const resolvedPage = posix.normalize(page)
if (page !== resolvedPage) {
throw new Error('Requested and resolved page mismatch')
}
return page
}
export function getPagePath (page, {distDir}) {
const serverBuildPath = join(distDir, SERVER_DIRECTORY)
const pagesManifest = require(join(serverBuildPath, PAGES_MANIFEST))
try {
page = normalizePagePath(page)
} catch (err) {
console.error(err)
throw pageNotFoundError(page)
}
if (!pagesManifest[page]) {
throw pageNotFoundError(page)
}
return join(serverBuildPath, pagesManifest[page])
}
export default async function requirePage (page, {distDir}) {
const pagePath = getPagePath(page, {distDir})
return require(pagePath)
}