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next.js/bin/next-dev

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#!/usr/bin/env node
import 'source-map-support/register'
import { resolve, join } from 'path'
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import parseArgs from 'minimist'
import { existsSync } from 'fs'
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import Server from '../server'
import { printAndExit } from '../lib/utils'
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process.env.NODE_ENV = process.env.NODE_ENV || 'development'
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const argv = parseArgs(process.argv.slice(2), {
alias: {
h: 'help',
p: 'port'
},
boolean: ['h'],
default: {
p: 3000
}
})
if (argv.help) {
console.log(`
Description
Starts the application in development mode (hot-code reloading, error
reporting, etc)
Usage
$ next dev <dir> -p <port number>
<dir> represents where the compiled .next folder should go.
If no directory is provided, .next will be created in the current directory
Options
--port, -p A port number on which to start the application
--help, -h Displays this message
`)
process.exit(0)
}
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const dir = resolve(argv._[0] || '.')
// Check if pages dir exists and warn if not
if (!existsSync(dir)) {
printAndExit(`> No such directory exists as the project root: ${dir}`)
}
if (!existsSync(join(dir, 'pages'))) {
if (existsSync(join(dir, '..', 'pages'))) {
printAndExit('> No `pages` directory found. Did you mean to run `next` in the parent (`../`) directory?')
}
printAndExit('> Couldn\'t find a `pages` directory. Please create one under the project root')
}
const srv = new Server({ dir, dev: true })
srv.start(argv.port)
.then(async () => {
if (!process.env.NOW) {
console.log(`> Ready on http://localhost:${argv.port}`)
}
})
.catch((err) => {
console.error(err)
process.exit(1)
})