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import path from 'path'
import { stringify } from 'querystring'
import { WEBPACK_RESOURCE_QUERIES } from '../../../../lib/constants'
import {
DEFAULT_METADATA_ROUTE_EXTENSIONS,
isMetadataRouteFile,
} from '../../../../lib/metadata/is-metadata-route'
import type { NextConfig } from '../../../../server/config-shared'
import { AppBundlePathNormalizer } from '../../../../server/normalizers/built/app/app-bundle-path-normalizer'
import { AppPathnameNormalizer } from '../../../../server/normalizers/built/app/app-pathname-normalizer'
import { loadEntrypoint } from '../../../load-entrypoint'
import type { PageExtensions } from '../../../page-extensions-type'
import { getFilenameAndExtension } from '../next-metadata-route-loader'
export async function createAppRouteCode({
appDir,
name,
page,
pagePath,
resolveAppRoute,
pageExtensions,
nextConfigOutput,
}: {
appDir: string
name: string
page: string
pagePath: string
resolveAppRoute: (
pathname: string
) => Promise<string | undefined> | string | undefined
pageExtensions: PageExtensions
nextConfigOutput: NextConfig['output']
}): Promise<string> {
// routePath is the path to the route handler file,
// but could be aliased e.g. private-next-app-dir/favicon.ico
const routePath = pagePath.replace(/[\\/]/, '/')
// This, when used with the resolver will give us the pathname to the built
// route handler file.
let resolvedPagePath = await resolveAppRoute(routePath)
if (!resolvedPagePath) {
throw new Error(
`Invariant: could not resolve page path for ${name} at ${routePath}`
)
}
// If this is a metadata route file, then we need to use the metadata-loader
// for the route to ensure that the route is generated.
const fileBaseName = path.parse(resolvedPagePath).name
const appDirRelativePath = resolvedPagePath.slice(appDir.length)
const isMetadataEntryFile = isMetadataRouteFile(
appDirRelativePath,
DEFAULT_METADATA_ROUTE_EXTENSIONS,
true
)
if (isMetadataEntryFile) {
const { ext } = getFilenameAndExtension(resolvedPagePath)
const isDynamicRouteExtension = pageExtensions.includes(ext)
resolvedPagePath = `next-metadata-route-loader?${stringify({
filePath: resolvedPagePath,
isDynamicRouteExtension: isDynamicRouteExtension ? '1' : '0',
})}!?${WEBPACK_RESOURCE_QUERIES.metadataRoute}`
}
const pathname = new AppPathnameNormalizer().normalize(page)
const bundlePath = new AppBundlePathNormalizer().normalize(page)
return await loadEntrypoint(
'app-route',
{
VAR_USERLAND: resolvedPagePath,
VAR_DEFINITION_PAGE: page,
VAR_DEFINITION_PATHNAME: pathname,
VAR_DEFINITION_FILENAME: fileBaseName,
VAR_DEFINITION_BUNDLE_PATH: bundlePath,
VAR_RESOLVED_PAGE_PATH: resolvedPagePath,
},
{
nextConfigOutput: JSON.stringify(nextConfigOutput),
}
)
}
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