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add pretty message if port already in use(#927) #932

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merged 10 commits into from
Feb 1, 2017
Merged

add pretty message if port already in use(#927) #932

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0efd6f9
add pretty message if port already use(#927)
dex157 Jan 30, 2017
30e77d1
fix console async nature
dex157 Jan 30, 2017
d675deb
fix linter
dex157 Jan 30, 2017
cb9b3b3
clean callbacks code
dex157 Jan 31, 2017
9f6ccce
Check package.json for the startup script
dex157 Jan 31, 2017
f55b901
fix path to package
dex157 Jan 31, 2017
8de2b51
omit callback
dex157 Jan 31, 2017
9404483
remove extra check, code execute in try block
dex157 Jan 31, 2017
0278e8b
+ reason for change start listen port of node http
dex157 Jan 31, 2017
6d7945c
remove extra code for search package
dex157 Jan 31, 2017
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16 changes: 13 additions & 3 deletions bin/next-dev
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Original file line number Diff line number Diff line change
Expand Up @@ -2,9 +2,10 @@
import 'source-map-support/register'
import { resolve, join } from 'path'
import parseArgs from 'minimist'
import { existsSync } from 'fs'
import { existsSync, readFileSync } from 'fs'
import Server from '../server'
import { printAndExit } from '../lib/utils'
import pkgUp from 'pkg-up'

process.env.NODE_ENV = process.env.NODE_ENV || 'development'

Expand Down Expand Up @@ -61,6 +62,15 @@ srv.start(argv.port)
}
})
.catch((err) => {
console.error(err)
process.exit(1)
if (err.code === 'EADDRINUSE') {
let errorMessage = `Port ${argv.port} is already in use.`
const pkgAppPath = pkgUp.sync('.')
const appPackage = JSON.parse(readFileSync(pkgAppPath, 'utf8'))
const nextScript = Object.entries(appPackage.scripts).find(scriptLine => scriptLine[1] === 'next')
if (nextScript) errorMessage += `\nUse \`npm run ${nextScript[0]} -- -p <some other port>\`.`
console.error(errorMessage)
} else {
console.error(err)
}
process.nextTick(() => process.exit(1))
})
1 change: 1 addition & 0 deletions package.json
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Expand Up @@ -70,6 +70,7 @@
"mkdirp-then": "1.2.0",
"mz": "2.6.0",
"path-match": "1.2.4",
"pkg-up": "1.0.0",
"react": "15.4.2",
"react-dom": "15.4.2",
"react-hot-loader": "3.0.0-beta.6",
Expand Down
8 changes: 4 additions & 4 deletions server/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -119,10 +119,10 @@ export default class Server {
await this.prepare()
this.http = http.createServer(this.getRequestHandler())
await new Promise((resolve, reject) => {
this.http.listen(port, (err) => {
if (err) return reject(err)
resolve()
})
// This code catches EADDRINUSE error if the port is already in use
this.http.on('error', reject)
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Why we need to do this?
I think this change has nothing to do with this PR.
If so, remove this.

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@arunoda

this.http.listen(port, (err) => {

This code does not catch the error when next starting listen port which already in use

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Okay.
Then add that as a comment.

this.http.on('listening', () => resolve())
this.http.listen(port)
})
}

Expand Down