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f72debcf48
Addresses #57066 Currently, a user running `next start` on an un-built Next.js project receives a confusing uncaught error before the process just ends: ``` ▲ Next.js 14.1.0 - Local: http://localhost:3000 [Error: ENOENT: no such file or directory, open '/home/flotwig/src/project/.next/BUILD_ID'] { errno: -2, code: 'ENOENT', syscall: 'open', path: '/home/flotwig/src/project/.next/BUILD_ID' } ``` In my case, I ran into this because I had not worked with Next.js for a while, and I forgot that `next dev` was used for local development, not `next start`. I believe many of the confused users in #57066 are making a similar mistake and not realizing it, due to the error message. This PR catches an `ENOENT` when reading `BUILD_ID` and suggests that the user `next build` or `next dev` to remove this friction point: ``` ▲ Next.js 14.1.1-canary.69 - Local: http://localhost:3000 Error: Could not find a production build in the '.next' directory. Try building your app with 'next build' before starting the production server. https://nextjs.org/docs/messages/production-start-no-build-id at setupFsCheck (/home/flotwig/src/next.js/packages/next/src/server/lib/router-utils/filesystem.ts:157:13) at initialize (/home/flotwig/src/next.js/packages/next/src/server/lib/router-server.ts:90:21) at Server.<anonymous> (/home/flotwig/src/next.js/packages/next/src/server/lib/start-server.ts:295:28) ``` A few things probably need to be resolved before this PR can merge, I would appreciate any input from Next.js maintainers. - [x] Is this the best place to catch this? I am not familiar with the Next.js codebase, so I just caught this in the most obvious way. - [x] Can the error message be improved? - [x] Add a test for the error in `test/development` --------- Co-authored-by: JJ Kasper <[email protected]>
23 lines
555 B
TypeScript
23 lines
555 B
TypeScript
import { createNext } from 'e2e-utils'
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describe('next start without next build', () => {
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it('should show error when there is no production build', async () => {
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const next = await createNext({
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files: __dirname,
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skipStart: true,
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startCommand: `pnpm next start`,
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})
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await next.start()
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await new Promise<void>((resolve, reject) => {
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next.on('stderr', (msg) => {
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if (msg.includes('Could not find a production build in the')) {
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resolve()
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}
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})
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})
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await next.destroy()
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})
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})
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