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refactor: added more strict app segment config validation
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@wyattjoh
wyattjoh committed Sep 26, 2024
1 parent 0901fa1 commit c552009
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Showing 2 changed files with 189 additions and 154 deletions.
307 changes: 165 additions & 142 deletions packages/next/src/build/analysis/get-page-static-info.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@ import { isEdgeRuntime } from '../../lib/is-edge-runtime'
import { RSC_MODULE_TYPES } from '../../shared/lib/constants'
import type { RSCMeta } from '../webpack/loaders/get-module-build-info'
import { PAGE_TYPES } from '../../lib/page-types'
import { AppSegmentConfigSchemaKeys } from '../app-segment-config'

// TODO: migrate preferredRegion here
// Don't forget to update the next-types-plugin file as well
Expand Down Expand Up @@ -503,180 +504,202 @@ export async function getPageStaticInfo(params: {
}): Promise<PageStaticInfo> {
const { isDev, pageFilePath, nextConfig, page, pageType } = params

const fileContent = (await tryToReadFile(pageFilePath, !isDev)) || ''
const fileContent = await tryToReadFile(pageFilePath, !isDev)

// If there's no file content or the file doesn't contain any of the keywords
// that we expect to find, then we should just bail the detection now.
if (
/(?<!(_jsx|jsx-))runtime|preferredRegion|getStaticProps|getServerSideProps|generateStaticParams|export const|generateImageMetadata|generateSitemaps/.test(
!fileContent ||
!/(?<!(_jsx|jsx-))runtime|preferredRegion|getStaticProps|getServerSideProps|generateStaticParams|export const|generateImageMetadata|generateSitemaps/.test(
fileContent
)
) {
const swcAST = await parseModule(pageFilePath, fileContent)
const {
ssg,
ssr,
runtime,
preferredRegion,
generateStaticParams,
generateImageMetadata,
generateSitemaps,
extraProperties,
directives,
} = checkExports(swcAST, pageFilePath)
const rscInfo = getRSCModuleInformation(fileContent, true)
const rsc = rscInfo.type

// default / failsafe value for config
let config: any // TODO: type this as unknown
try {
config = extractExportedConstValue(swcAST, 'config')
} catch (e) {
if (e instanceof UnsupportedValueError) {
warnAboutUnsupportedValue(pageFilePath, page, e)
}
// `export config` doesn't exist, or other unknown error thrown by swc, silence them
return {
ssr: false,
ssg: false,
rsc: RSC_MODULE_TYPES.server,
generateStaticParams: false,
generateImageMetadata: false,
generateSitemaps: false,
amp: false,
runtime: undefined,
}
}

const extraConfig: Record<string, any> = {}

if (extraProperties && pageType === PAGE_TYPES.APP) {
for (const prop of extraProperties) {
if (!AUTHORIZED_EXTRA_ROUTER_PROPS.includes(prop)) continue
try {
extraConfig[prop] = extractExportedConstValue(swcAST, prop)
} catch (e) {
if (e instanceof UnsupportedValueError) {
warnAboutUnsupportedValue(pageFilePath, page, e)
}
}
}
} else if (pageType === PAGE_TYPES.PAGES) {
for (const key in config) {
if (!AUTHORIZED_EXTRA_ROUTER_PROPS.includes(key)) continue
extraConfig[key] = config[key]
}
const swcAST = await parseModule(pageFilePath, fileContent)

const {
ssg,
ssr,
runtime,
preferredRegion,
generateStaticParams,
generateImageMetadata,
generateSitemaps,
extraProperties,
directives,
} = checkExports(swcAST, pageFilePath)

const rscInfo = getRSCModuleInformation(fileContent, true)
const rsc = rscInfo.type

// default / failsafe value for config
let config: any // TODO: type this as unknown
try {
config = extractExportedConstValue(swcAST, 'config')
} catch (e) {
if (e instanceof UnsupportedValueError) {
warnAboutUnsupportedValue(pageFilePath, page, e)
}
// `export config` doesn't exist, or other unknown error thrown by swc, silence them
}

if (pageType === PAGE_TYPES.APP) {
if (config) {
let message = `Page config in ${pageFilePath} is deprecated. Replace \`export const config=…\` with the following:`
const extraConfig: Record<string, any> = {}

if (config.runtime) {
message += `\n - \`export const runtime = ${JSON.stringify(
config.runtime
)}\``
if (extraProperties && pageType === PAGE_TYPES.APP) {
for (const prop of extraProperties) {
if (!AUTHORIZED_EXTRA_ROUTER_PROPS.includes(prop)) continue
try {
extraConfig[prop] = extractExportedConstValue(swcAST, prop)
} catch (e) {
if (e instanceof UnsupportedValueError) {
warnAboutUnsupportedValue(pageFilePath, page, e)
}
}
}
} else if (pageType === PAGE_TYPES.PAGES) {
for (const key in config) {
if (!AUTHORIZED_EXTRA_ROUTER_PROPS.includes(key)) continue
extraConfig[key] = config[key]
}
}

if (config.regions) {
message += `\n - \`export const preferredRegion = ${JSON.stringify(
config.regions
)}\``
}
if (pageType === PAGE_TYPES.APP) {
if (config) {
let message = `Page config in ${pageFilePath} is deprecated. Replace \`export const config=…\` with the following:`

message += `\nVisit https://nextjs.org/docs/app/api-reference/file-conventions/route-segment-config for more information.`
if (config.runtime) {
message += `\n - \`export const runtime = ${JSON.stringify(
config.runtime
)}\``
}

if (isDev) {
Log.warnOnce(message)
} else {
throw new Error(message)
}
config = {}
if (config.regions) {
message += `\n - \`export const preferredRegion = ${JSON.stringify(
config.regions
)}\``
}
}
if (!config) config = {}

// We use `export const config = { runtime: '...' }` to specify the page runtime for pages/.
// In the new app directory, we prefer to use `export const runtime = '...'`
// and deprecate the old way. To prevent breaking changes for `pages`, we use the exported config
// as the fallback value.
let resolvedRuntime
if (pageType === PAGE_TYPES.APP) {
resolvedRuntime = runtime
} else {
resolvedRuntime = runtime || config.runtime
}

if (
typeof resolvedRuntime !== 'undefined' &&
resolvedRuntime !== SERVER_RUNTIME.nodejs &&
!isEdgeRuntime(resolvedRuntime)
) {
const options = Object.values(SERVER_RUNTIME).join(', ')
const message =
typeof resolvedRuntime !== 'string'
? `The \`runtime\` config must be a string. Please leave it empty or choose one of: ${options}`
: `Provided runtime "${resolvedRuntime}" is not supported. Please leave it empty or choose one of: ${options}`
message += `\nVisit https://nextjs.org/docs/app/api-reference/file-conventions/route-segment-config for more information.`

if (isDev) {
Log.error(message)
Log.warnOnce(message)
} else {
throw new Error(message)
}
config = {}
}
}
if (!config) config = {}

// We use `export const config = { runtime: '...' }` to specify the page runtime for pages/.
// In the new app directory, we prefer to use `export const runtime = '...'`
// and deprecate the old way. To prevent breaking changes for `pages`, we use the exported config
// as the fallback value.
let resolvedRuntime
if (pageType === PAGE_TYPES.APP) {
resolvedRuntime = runtime
} else {
resolvedRuntime = runtime || config.runtime
}

if (
typeof resolvedRuntime !== 'undefined' &&
resolvedRuntime !== SERVER_RUNTIME.nodejs &&
!isEdgeRuntime(resolvedRuntime)
) {
const options = Object.values(SERVER_RUNTIME).join(', ')
const message =
typeof resolvedRuntime !== 'string'
? `The \`runtime\` config must be a string. Please leave it empty or choose one of: ${options}`
: `Provided runtime "${resolvedRuntime}" is not supported. Please leave it empty or choose one of: ${options}`
if (isDev) {
Log.error(message)
} else {
throw new Error(message)
}
}

const requiresServerRuntime = ssr || ssg || pageType === PAGE_TYPES.APP
const requiresServerRuntime = ssr || ssg || pageType === PAGE_TYPES.APP

const isAnAPIRoute = isAPIRoute(page?.replace(/^(?:\/src)?\/pages\//, '/'))
const isAnAPIRoute =
pageType === PAGE_TYPES.PAGES &&
isAPIRoute(page?.replace(/^(?:\/src)?\/pages\//, '/'))

resolvedRuntime =
isEdgeRuntime(resolvedRuntime) || requiresServerRuntime
? resolvedRuntime
: undefined
resolvedRuntime =
isEdgeRuntime(resolvedRuntime) || requiresServerRuntime
? resolvedRuntime
: undefined

if (resolvedRuntime === SERVER_RUNTIME.experimentalEdge) {
warnAboutExperimentalEdge(isAnAPIRoute ? page! : null)
}
if (resolvedRuntime === SERVER_RUNTIME.experimentalEdge) {
warnAboutExperimentalEdge(isAnAPIRoute ? page! : null)
}

if (
resolvedRuntime === SERVER_RUNTIME.edge &&
pageType === PAGE_TYPES.PAGES &&
page &&
!isAnAPIRoute
) {
const message = `Page ${page} provided runtime 'edge', the edge runtime for rendering is currently experimental. Use runtime 'experimental-edge' instead.`
if (isDev) {
Log.error(message)
} else {
throw new Error(message)
}
if (
resolvedRuntime === SERVER_RUNTIME.edge &&
pageType === PAGE_TYPES.PAGES &&
page &&
!isAnAPIRoute
) {
const message = `Page ${page} provided runtime 'edge', the edge runtime for rendering is currently experimental. Use runtime 'experimental-edge' instead.`
if (isDev) {
Log.error(message)
} else {
throw new Error(message)
}
}

const middlewareConfig = getMiddlewareConfig(
page ?? 'middleware/edge API route',
config,
nextConfig
)
const middlewareConfig = getMiddlewareConfig(
page ?? 'middleware/edge API route',
config,
nextConfig
)

if (
pageType === PAGE_TYPES.APP &&
directives?.has('client') &&
generateStaticParams
) {
throw new Error(
`Page "${page}" cannot use both "use client" and export function "generateStaticParams()".`
)
}
const isClientComponent = directives ? directives.has('client') : false

return {
ssr,
ssg,
rsc,
generateStaticParams,
generateImageMetadata,
generateSitemaps,
amp: config.amp || false,
...(middlewareConfig && { middleware: middlewareConfig }),
...(resolvedRuntime && { runtime: resolvedRuntime }),
preferredRegion,
extraConfig,
if (pageType === PAGE_TYPES.APP) {
if (isClientComponent) {
if (generateStaticParams) {
throw new Error(
`Page "${page}" cannot use both "use client" and export function "generateStaticParams()".`
)
}

// Discover if any app configurations are provided on the component. If
// any are, we need to error because the configuration is not used.
if (extraProperties) {
for (const key of AppSegmentConfigSchemaKeys) {
if (!extraProperties.has(key)) continue

throw new Error(
`Page "${page}" cannot use both "use client" and export "${key}"`
)
}
}
}
}

return {
ssr: false,
ssg: false,
rsc: RSC_MODULE_TYPES.server,
generateStaticParams: false,
generateImageMetadata: false,
generateSitemaps: false,
amp: false,
runtime: undefined,
ssr,
ssg,
rsc,
generateStaticParams,
generateImageMetadata,
generateSitemaps,
amp: config.amp || false,
...(middlewareConfig && { middleware: middlewareConfig }),
...(resolvedRuntime && { runtime: resolvedRuntime }),
preferredRegion,
extraConfig,
}
}
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