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import { loadEnvConfig } from '@next/env'
import * as Log from '../../build/output/log'
import { bold, purple } from '../../lib/picocolors'
import {
PHASE_DEVELOPMENT_SERVER,
PHASE_PRODUCTION_BUILD,
} from '../../shared/lib/constants'
import loadConfig, { type ConfiguredExperimentalFeature } from '../config'
export function logStartInfo({
networkUrl,
appUrl,
envInfo,
experimentalFeatures,
maxExperimentalFeatures = Infinity,
}: {
networkUrl: string | null
appUrl: string | null
envInfo?: string[]
experimentalFeatures?: ConfiguredExperimentalFeature[]
maxExperimentalFeatures?: number
}) {
let bundlerSuffix
if (process.env.TURBOPACK) {
bundlerSuffix = ' (Turbopack)'
} else if (process.env.NEXT_RSPACK) {
bundlerSuffix = ' (Rspack)'
} else {
bundlerSuffix = ''
}
Log.bootstrap(
`${bold(
purple(`${Log.prefixes.ready} Next.js ${process.env.__NEXT_VERSION}`)
)}${bundlerSuffix}`
)
if (appUrl) {
Log.bootstrap(`- Local: ${appUrl}`)
}
if (networkUrl) {
Log.bootstrap(`- Network: ${networkUrl}`)
}
if (envInfo?.length) Log.bootstrap(`- Environments: ${envInfo.join(', ')}`)
if (experimentalFeatures?.length) {
Log.bootstrap(`- Experiments (use with caution):`)
// only show a maximum number of flags
for (const exp of experimentalFeatures.slice(0, maxExperimentalFeatures)) {
const symbol =
typeof exp.value === 'boolean'
? exp.value === true
? bold('✓')
: bold('⨯')
: '·'
const suffix =
typeof exp.value === 'number' || typeof exp.value === 'string'
? `: ${JSON.stringify(exp.value)}`
: ''
const reason = exp.reason ? ` (${exp.reason})` : ''
Log.bootstrap(` ${symbol} ${exp.key}${suffix}${reason}`)
}
/* indicate if there are more than the maximum shown no. flags */
if (experimentalFeatures.length > maxExperimentalFeatures) {
Log.bootstrap(` · ...`)
}
}
// New line after the bootstrap info
Log.info('')
}
export async function getStartServerInfo({
dir,
dev,
debugPrerender,
}: {
dir: string
dev: boolean
debugPrerender?: boolean
}): Promise<{
envInfo?: string[]
experimentalFeatures?: ConfiguredExperimentalFeature[]
}> {
let experimentalFeatures: ConfiguredExperimentalFeature[] = []
await loadConfig(
dev ? PHASE_DEVELOPMENT_SERVER : PHASE_PRODUCTION_BUILD,
dir,
{
reportExperimentalFeatures(features) {
experimentalFeatures = features.sort(
({ key: a }, { key: b }) => a.length - b.length
)
},
debugPrerender,
}
)
// we need to reset env if we are going to create
// the worker process with the esm loader so that the
// initial env state is correct
let envInfo: string[] = []
const { loadedEnvFiles } = loadEnvConfig(dir, true, console, false)
if (loadedEnvFiles.length > 0) {
envInfo = loadedEnvFiles.map((f) => f.path)
}
return {
envInfo,
experimentalFeatures,
}
}
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