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next.js/server/build/index.js
Craig McNamara 7f335cb032 Allow BUILD_ID to be set using generateBuildId (minor) (#3873)
* Allow BUILD_ID to be set in the environment

This makes multi server deploys with Capistrano possible.

* next.config.js generateBuildId support

enable customising the build id via config

* Provide default for generateBuildId

* This is not used
2018-03-31 16:34:52 +02:00

62 lines
1.7 KiB
JavaScript

import { join } from 'path'
import promisify from '../lib/promisify'
import fs from 'fs'
import webpack from 'webpack'
import getConfig from '../config'
import { PHASE_PRODUCTION_BUILD } from '../../lib/constants'
import getBaseWebpackConfig from './webpack'
const access = promisify(fs.access)
const writeFile = promisify(fs.writeFile)
export default async function build (dir, conf = null) {
const config = getConfig(PHASE_PRODUCTION_BUILD, dir, conf)
const buildId = await config.generateBuildId() // defaults to a uuid
try {
await access(dir, (fs.constants || fs).W_OK)
} catch (err) {
console.error(`> Failed, build directory is not writeable. https://err.sh/zeit/next.js/build-dir-not-writeable`)
throw err
}
try {
const configs = await Promise.all([
getBaseWebpackConfig(dir, { buildId, isServer: false, config }),
getBaseWebpackConfig(dir, { buildId, isServer: true, config })
])
await runCompiler(configs)
await writeBuildId(dir, buildId, config)
} catch (err) {
console.error(`> Failed to build`)
throw err
}
}
function runCompiler (compiler) {
return new Promise(async (resolve, reject) => {
const webpackCompiler = await webpack(await compiler)
webpackCompiler.run((err, stats) => {
if (err) return reject(err)
const jsonStats = stats.toJson()
if (jsonStats.errors.length > 0) {
const error = new Error(jsonStats.errors[0])
error.errors = jsonStats.errors
error.warnings = jsonStats.warnings
return reject(error)
}
resolve(jsonStats)
})
})
}
async function writeBuildId (dir, buildId, config) {
const buildIdPath = join(dir, config.distDir, 'BUILD_ID')
await writeFile(buildIdPath, buildId, 'utf8')
}