-
Notifications
You must be signed in to change notification settings - Fork 27.2k
/
utils.ts
792 lines (700 loc) · 21.3 KB
/
utils.ts
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
import chalk from 'next/dist/compiled/chalk'
import gzipSize from 'next/dist/compiled/gzip-size'
import textTable from 'next/dist/compiled/text-table'
import path from 'path'
import { isValidElementType } from 'react-is'
import stripAnsi from 'strip-ansi'
import { Redirect, Rewrite, Header } from '../lib/check-custom-routes'
import {
SSG_GET_INITIAL_PROPS_CONFLICT,
SERVER_PROPS_GET_INIT_PROPS_CONFLICT,
SERVER_PROPS_SSG_CONFLICT,
} from '../lib/constants'
import prettyBytes from '../lib/pretty-bytes'
import { recursiveReadDir } from '../lib/recursive-readdir'
import { getRouteMatcher, getRouteRegex } from '../next-server/lib/router/utils'
import { isDynamicRoute } from '../next-server/lib/router/utils/is-dynamic'
import { findPageFile } from '../server/lib/find-page-file'
import { GetStaticPaths } from 'next/types'
const fileGzipStats: { [k: string]: Promise<number> } = {}
const fsStatGzip = (file: string) => {
if (fileGzipStats[file]) return fileGzipStats[file]
fileGzipStats[file] = gzipSize.file(file)
return fileGzipStats[file]
}
export function collectPages(
directory: string,
pageExtensions: string[]
): Promise<string[]> {
return recursiveReadDir(
directory,
new RegExp(`\\.(?:${pageExtensions.join('|')})$`)
)
}
export interface PageInfo {
isAmp?: boolean
isHybridAmp?: boolean
size: number
totalSize: number
static: boolean
isSsg: boolean
ssgPageRoutes: string[] | null
hasSsgFallback: boolean
serverBundle: string
}
export async function printTreeView(
list: readonly string[],
pageInfos: Map<string, PageInfo>,
serverless: boolean,
{
distPath,
buildId,
pagesDir,
pageExtensions,
buildManifest,
isModern,
useStatic404,
}: {
distPath: string
buildId: string
pagesDir: string
pageExtensions: string[]
buildManifest: BuildManifestShape
isModern: boolean
useStatic404: boolean
}
) {
const getPrettySize = (_size: number): string => {
const size = prettyBytes(_size)
// green for 0-130kb
if (_size < 130 * 1000) return chalk.green(size)
// yellow for 130-170kb
if (_size < 170 * 1000) return chalk.yellow(size)
// red for >= 170kb
return chalk.red.bold(size)
}
const getCleanName = (fileName: string) =>
fileName
// Trim off `static/`
.replace(/^static\//, '')
// Re-add `static/` for root files
.replace(/^<buildId>/, 'static')
// Remove file hash
.replace(/[.-]([0-9a-z]{6})[0-9a-z]{14}(?=\.)/, '.$1')
const messages: [string, string, string][] = [
['Page', 'Size', 'First Load JS'].map(entry => chalk.underline(entry)) as [
string,
string,
string
],
]
const hasCustomApp = await findPageFile(pagesDir, '/_app', pageExtensions)
const hasCustomError = await findPageFile(pagesDir, '/_error', pageExtensions)
if (useStatic404) {
pageInfos.set('/404', {
...(pageInfos.get('/404') || pageInfos.get('/_error')),
static: true,
} as any)
list = [...list, '/404']
}
const sizeData = await computeFromManifest(
buildManifest,
distPath,
buildId,
isModern,
pageInfos
)
const pageList = list
.slice()
.filter(
e =>
!(
e === '/_document' ||
(!hasCustomApp && e === '/_app') ||
(!hasCustomError && e === '/_error')
)
)
.sort((a, b) => a.localeCompare(b))
pageList.forEach((item, i, arr) => {
const symbol =
i === 0
? arr.length === 1
? '─'
: '┌'
: i === arr.length - 1
? '└'
: '├'
const pageInfo = pageInfos.get(item)
messages.push([
`${symbol} ${
item === '/_app'
? ' '
: pageInfo?.static
? '○'
: pageInfo?.isSsg
? '●'
: 'λ'
} ${item}`,
pageInfo
? pageInfo.isAmp
? chalk.cyan('AMP')
: pageInfo.size >= 0
? prettyBytes(pageInfo.size)
: ''
: '',
pageInfo
? pageInfo.isAmp
? chalk.cyan('AMP')
: pageInfo.size >= 0
? getPrettySize(pageInfo.totalSize)
: ''
: '',
])
const uniqueCssFiles =
buildManifest.pages[item]?.filter(
file => file.endsWith('.css') && sizeData.uniqueFiles.includes(file)
) || []
if (uniqueCssFiles.length > 0) {
const contSymbol = i === arr.length - 1 ? ' ' : '├'
uniqueCssFiles.forEach((file, index, { length }) => {
const innerSymbol = index === length - 1 ? '└' : '├'
messages.push([
`${contSymbol} ${innerSymbol} ${getCleanName(file)}`,
prettyBytes(sizeData.sizeUniqueFiles[file]),
'',
])
})
}
if (pageInfo?.ssgPageRoutes?.length) {
const totalRoutes = pageInfo.ssgPageRoutes.length
const previewPages = totalRoutes === 4 ? 4 : 3
const contSymbol = i === arr.length - 1 ? ' ' : '├'
const routes = pageInfo.ssgPageRoutes.slice(0, previewPages)
if (totalRoutes > previewPages) {
const remaining = totalRoutes - previewPages
routes.push(`[+${remaining} more paths]`)
}
routes.forEach((slug, index, { length }) => {
const innerSymbol = index === length - 1 ? '└' : '├'
messages.push([`${contSymbol} ${innerSymbol} ${slug}`, '', ''])
})
}
})
const sharedFilesSize = sizeData.sizeCommonFiles
const sharedFiles = sizeData.sizeCommonFile
messages.push([
'+ First Load JS shared by all',
getPrettySize(sharedFilesSize),
'',
])
const sharedFileKeys = Object.keys(sharedFiles)
const sharedCssFiles: string[] = []
;[
...sharedFileKeys
.filter(file => {
if (file.endsWith('.css')) {
sharedCssFiles.push(file)
return false
}
return true
})
.map(e => e.replace(buildId, '<buildId>'))
.sort(),
...sharedCssFiles.map(e => e.replace(buildId, '<buildId>')).sort(),
].forEach((fileName, index, { length }) => {
const innerSymbol = index === length - 1 ? '└' : '├'
const originalName = fileName.replace('<buildId>', buildId)
const cleanName = getCleanName(fileName)
messages.push([
` ${innerSymbol} ${cleanName}`,
prettyBytes(sharedFiles[originalName]),
'',
])
})
console.log(
textTable(messages, {
align: ['l', 'l', 'r'],
stringLength: str => stripAnsi(str).length,
})
)
console.log()
console.log(
textTable(
[
[
'λ',
serverless ? '(Lambda)' : '(Server)',
`server-side renders at runtime (uses ${chalk.cyan(
'getInitialProps'
)} or ${chalk.cyan('getServerSideProps')})`,
],
[
'○',
'(Static)',
'automatically rendered as static HTML (uses no initial props)',
],
[
'●',
'(SSG)',
`automatically generated as static HTML + JSON (uses ${chalk.cyan(
'getStaticProps'
)})`,
],
] as [string, string, string][],
{
align: ['l', 'l', 'l'],
stringLength: str => stripAnsi(str).length,
}
)
)
console.log()
}
export function printCustomRoutes({
redirects,
rewrites,
headers,
}: {
redirects: Redirect[]
rewrites: Rewrite[]
headers: Header[]
}) {
const printRoutes = (
routes: Redirect[] | Rewrite[] | Header[],
type: 'Redirects' | 'Rewrites' | 'Headers'
) => {
const isRedirects = type === 'Redirects'
const isHeaders = type === 'Headers'
console.log(chalk.underline(type))
console.log()
/*
┌ source
├ permanent/statusCode
└ destination
*/
const routesStr = (routes as any[])
.map((route: { source: string }) => {
let routeStr = `┌ source: ${route.source}\n`
if (!isHeaders) {
const r = route as Rewrite
routeStr += `${isRedirects ? '├' : '└'} destination: ${
r.destination
}\n`
}
if (isRedirects) {
const r = route as Redirect
routeStr += `└ ${
r.statusCode
? `status: ${r.statusCode}`
: `permanent: ${r.permanent}`
}\n`
}
if (isHeaders) {
const r = route as Header
routeStr += `└ headers:\n`
for (let i = 0; i < r.headers.length; i++) {
const header = r.headers[i]
const last = i === headers.length - 1
routeStr += ` ${last ? '└' : '├'} ${header.key}: ${header.value}\n`
}
}
return routeStr
})
.join('\n')
console.log(routesStr, '\n')
}
if (redirects.length) {
printRoutes(redirects, 'Redirects')
}
if (rewrites.length) {
printRoutes(rewrites, 'Rewrites')
}
if (headers.length) {
printRoutes(headers, 'Headers')
}
}
type BuildManifestShape = { pages: { [k: string]: string[] } }
type ComputeManifestShape = {
commonFiles: string[]
uniqueFiles: string[]
sizeUniqueFiles: { [file: string]: number }
sizeCommonFile: { [file: string]: number }
sizeCommonFiles: number
}
let cachedBuildManifest: BuildManifestShape | undefined
let lastCompute: ComputeManifestShape | undefined
let lastComputeModern: boolean | undefined
let lastComputePageInfo: boolean | undefined
async function computeFromManifest(
manifest: BuildManifestShape,
distPath: string,
buildId: string,
isModern: boolean,
pageInfos?: Map<string, PageInfo>
): Promise<ComputeManifestShape> {
if (
Object.is(cachedBuildManifest, manifest) &&
lastComputeModern === isModern &&
lastComputePageInfo === !!pageInfos
) {
return lastCompute!
}
let expected = 0
const files = new Map<string, number>()
Object.keys(manifest.pages).forEach(key => {
// prevent duplicate '/' and '/index'
if (key === '/index') return
if (key === '/_polyfills') {
return
}
if (pageInfos) {
const cleanKey = key.replace(/\/index$/, '') || '/'
const pageInfo = pageInfos.get(cleanKey)
// don't include AMP pages since they don't rely on shared bundles
if (pageInfo?.isHybridAmp || pageInfo?.isAmp) {
return
}
}
++expected
manifest.pages[key].forEach(file => {
if (
// Select Modern or Legacy scripts
file.endsWith('.module.js') !== isModern
) {
return
}
if (key === '/_app') {
files.set(file, Infinity)
} else if (files.has(file)) {
files.set(file, files.get(file)! + 1)
} else {
files.set(file, 1)
}
})
})
// Add well-known shared file
files.set(
path.posix.join(
`static/${buildId}/pages/`,
`/_app${isModern ? '.module' : ''}.js`
),
Infinity
)
const commonFiles = [...files.entries()]
.filter(([, len]) => len === expected || len === Infinity)
.map(([f]) => f)
const uniqueFiles = [...files.entries()]
.filter(([, len]) => len === 1)
.map(([f]) => f)
let stats: [string, number][]
try {
stats = await Promise.all(
commonFiles.map(
async f =>
[f, await fsStatGzip(path.join(distPath, f))] as [string, number]
)
)
} catch (_) {
stats = []
}
let uniqueStats: [string, number][]
try {
uniqueStats = await Promise.all(
uniqueFiles.map(
async f =>
[f, await fsStatGzip(path.join(distPath, f))] as [string, number]
)
)
} catch (_) {
uniqueStats = []
}
lastCompute = {
commonFiles,
uniqueFiles,
sizeUniqueFiles: uniqueStats.reduce(
(obj, n) => Object.assign(obj, { [n[0]]: n[1] }),
{}
),
sizeCommonFile: stats.reduce(
(obj, n) => Object.assign(obj, { [n[0]]: n[1] }),
{}
),
sizeCommonFiles: stats.reduce((size, [f, stat]) => {
if (f.endsWith('.css')) return size
return size + stat
}, 0),
}
cachedBuildManifest = manifest
lastComputeModern = isModern
lastComputePageInfo = !!pageInfos
return lastCompute!
}
function difference<T>(main: T[], sub: T[]): T[] {
const a = new Set(main)
const b = new Set(sub)
return [...a].filter(x => !b.has(x))
}
function intersect<T>(main: T[], sub: T[]): T[] {
const a = new Set(main)
const b = new Set(sub)
return [...new Set([...a].filter(x => b.has(x)))]
}
function sum(a: number[]): number {
return a.reduce((size, stat) => size + stat, 0)
}
export async function getJsPageSizeInKb(
page: string,
distPath: string,
buildId: string,
buildManifest: BuildManifestShape,
isModern: boolean
): Promise<[number, number]> {
const data = await computeFromManifest(
buildManifest,
distPath,
buildId,
isModern
)
const fnFilterModern = (entry: string) =>
entry.endsWith('.js') && entry.endsWith('.module.js') === isModern
const pageFiles = (buildManifest.pages[page] || []).filter(fnFilterModern)
const appFiles = (buildManifest.pages['/_app'] || []).filter(fnFilterModern)
const fnMapRealPath = (dep: string) => `${distPath}/${dep}`
const allFilesReal = [...new Set([...pageFiles, ...appFiles])].map(
fnMapRealPath
)
const selfFilesReal = difference(
intersect(pageFiles, data.uniqueFiles),
data.commonFiles
).map(fnMapRealPath)
const clientBundle = path.join(
distPath,
`static/${buildId}/pages/`,
`${page}${isModern ? '.module' : ''}.js`
)
const appBundle = path.join(
distPath,
`static/${buildId}/pages/`,
`/_app${isModern ? '.module' : ''}.js`
)
selfFilesReal.push(clientBundle)
allFilesReal.push(clientBundle)
if (clientBundle !== appBundle) {
allFilesReal.push(appBundle)
}
try {
// Doesn't use `Promise.all`, as we'd double compute duplicate files. This
// function is memoized, so the second one will instantly resolve.
const allFilesSize = sum(await Promise.all(allFilesReal.map(fsStatGzip)))
const selfFilesSize = sum(await Promise.all(selfFilesReal.map(fsStatGzip)))
return [selfFilesSize, allFilesSize]
} catch (_) {}
return [-1, -1]
}
export async function buildStaticPaths(
page: string,
getStaticPaths: GetStaticPaths
): Promise<{ paths: string[]; fallback: boolean }> {
const prerenderPaths = new Set<string>()
const _routeRegex = getRouteRegex(page)
const _routeMatcher = getRouteMatcher(_routeRegex)
// Get the default list of allowed params.
const _validParamKeys = Object.keys(_routeMatcher(page))
const staticPathsResult = await getStaticPaths()
const expectedReturnVal =
`Expected: { paths: [], fallback: boolean }\n` +
`See here for more info: https://err.sh/zeit/next.js/invalid-getstaticpaths-value`
if (
!staticPathsResult ||
typeof staticPathsResult !== 'object' ||
Array.isArray(staticPathsResult)
) {
throw new Error(
`Invalid value returned from getStaticPaths in ${page}. Received ${typeof staticPathsResult} ${expectedReturnVal}`
)
}
const invalidStaticPathKeys = Object.keys(staticPathsResult).filter(
key => !(key === 'paths' || key === 'fallback')
)
if (invalidStaticPathKeys.length > 0) {
throw new Error(
`Extra keys returned from getStaticPaths in ${page} (${invalidStaticPathKeys.join(
', '
)}) ${expectedReturnVal}`
)
}
if (typeof staticPathsResult.fallback !== 'boolean') {
throw new Error(
`The \`fallback\` key must be returned from getStaticPaths in ${page}.\n` +
expectedReturnVal
)
}
const toPrerender = staticPathsResult.paths
if (!Array.isArray(toPrerender)) {
throw new Error(
`Invalid \`paths\` value returned from getStaticProps in ${page}.\n` +
`\`paths\` must be an array of strings or objects of shape { params: [key: string]: string }`
)
}
toPrerender.forEach(entry => {
// For a string-provided path, we must make sure it matches the dynamic
// route.
if (typeof entry === 'string') {
const result = _routeMatcher(entry)
if (!result) {
throw new Error(
`The provided path \`${entry}\` does not match the page: \`${page}\`.`
)
}
prerenderPaths?.add(entry)
}
// For the object-provided path, we must make sure it specifies all
// required keys.
else {
const invalidKeys = Object.keys(entry).filter(key => key !== 'params')
if (invalidKeys.length) {
throw new Error(
`Additional keys were returned from \`getStaticPaths\` in page "${page}". ` +
`URL Parameters intended for this dynamic route must be nested under the \`params\` key, i.e.:` +
`\n\n\treturn { params: { ${_validParamKeys
.map(k => `${k}: ...`)
.join(', ')} } }` +
`\n\nKeys that need to be moved: ${invalidKeys.join(', ')}.\n`
)
}
const { params = {} } = entry
let builtPage = page
_validParamKeys.forEach(validParamKey => {
const { repeat } = _routeRegex.groups[validParamKey]
const paramValue = params[validParamKey]
if (
(repeat && !Array.isArray(paramValue)) ||
(!repeat && typeof paramValue !== 'string')
) {
throw new Error(
`A required parameter (${validParamKey}) was not provided as ${
repeat ? 'an array' : 'a string'
} in getStaticPaths for ${page}`
)
}
builtPage = builtPage.replace(
`[${repeat ? '...' : ''}${validParamKey}]`,
repeat
? (paramValue as string[]).map(encodeURIComponent).join('/')
: encodeURIComponent(paramValue as string)
)
})
prerenderPaths?.add(builtPage)
}
})
return { paths: [...prerenderPaths], fallback: staticPathsResult.fallback }
}
export async function isPageStatic(
page: string,
serverBundle: string,
runtimeEnvConfig: any
): Promise<{
isStatic?: boolean
isAmpOnly?: boolean
isHybridAmp?: boolean
hasServerProps?: boolean
hasStaticProps?: boolean
prerenderRoutes?: string[] | undefined
prerenderFallback?: boolean | undefined
}> {
try {
require('../next-server/lib/runtime-config').setConfig(runtimeEnvConfig)
const mod = require(serverBundle)
const Comp = mod.default || mod
if (!Comp || !isValidElementType(Comp) || typeof Comp === 'string') {
throw new Error('INVALID_DEFAULT_EXPORT')
}
const hasGetInitialProps = !!(Comp as any).getInitialProps
const hasStaticProps = !!mod.getStaticProps
const hasStaticPaths = !!mod.getStaticPaths
const hasServerProps = !!mod.getServerSideProps
const hasLegacyServerProps = !!mod.unstable_getServerProps
const hasLegacyStaticProps = !!mod.unstable_getStaticProps
const hasLegacyStaticPaths = !!mod.unstable_getStaticPaths
const hasLegacyStaticParams = !!mod.unstable_getStaticParams
if (hasLegacyStaticParams) {
throw new Error(
`unstable_getStaticParams was replaced with getStaticPaths. Please update your code.`
)
}
if (hasLegacyStaticPaths) {
throw new Error(
`unstable_getStaticPaths was replaced with getStaticPaths. Please update your code.`
)
}
if (hasLegacyStaticProps) {
throw new Error(
`unstable_getStaticProps was replaced with getStaticProps. Please update your code.`
)
}
if (hasLegacyServerProps) {
throw new Error(
`unstable_getServerProps was replaced with getServerSideProps. Please update your code.`
)
}
// A page cannot be prerendered _and_ define a data requirement. That's
// contradictory!
if (hasGetInitialProps && hasStaticProps) {
throw new Error(SSG_GET_INITIAL_PROPS_CONFLICT)
}
if (hasGetInitialProps && hasServerProps) {
throw new Error(SERVER_PROPS_GET_INIT_PROPS_CONFLICT)
}
if (hasStaticProps && hasServerProps) {
throw new Error(SERVER_PROPS_SSG_CONFLICT)
}
const pageIsDynamic = isDynamicRoute(page)
// A page cannot have static parameters if it is not a dynamic page.
if (hasStaticProps && hasStaticPaths && !pageIsDynamic) {
throw new Error(
`getStaticPaths can only be used with dynamic pages, not '${page}'.` +
`\nLearn more: https://nextjs.org/docs#dynamic-routing`
)
}
if (hasStaticProps && pageIsDynamic && !hasStaticPaths) {
throw new Error(
`getStaticPaths is required for dynamic SSG pages and is missing for '${page}'.` +
`\nRead more: https://err.sh/next.js/invalid-getstaticpaths-value`
)
}
let prerenderRoutes: Array<string> | undefined
let prerenderFallback: boolean | undefined
if (hasStaticProps && hasStaticPaths) {
;({
paths: prerenderRoutes,
fallback: prerenderFallback,
} = await buildStaticPaths(page, mod.getStaticPaths))
}
const config = mod.config || {}
return {
isStatic: !hasStaticProps && !hasGetInitialProps && !hasServerProps,
isHybridAmp: config.amp === 'hybrid',
isAmpOnly: config.amp === true,
prerenderRoutes,
prerenderFallback,
hasStaticProps,
hasServerProps,
}
} catch (err) {
if (err.code === 'MODULE_NOT_FOUND') return {}
throw err
}
}
export function hasCustomGetInitialProps(
bundle: string,
runtimeEnvConfig: any
): boolean {
require('../next-server/lib/runtime-config').setConfig(runtimeEnvConfig)
let mod = require(bundle)
if (bundle.endsWith('_app.js') || bundle.endsWith('_error.js')) {
mod = mod.default || mod
} else {
// since we don't output _app in serverless mode get it from a page
mod = mod._app
}
return mod.getInitialProps !== mod.origGetInitialProps
}