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next.js/server/build/index.js

67 lines
1.8 KiB
JavaScript

import { tmpdir } from 'os'
import { join } from 'path'
import fs from 'mz/fs'
import uuid from 'uuid'
import del from 'del'
import webpack from './webpack'
import replaceCurrentBuild from './replace'
import md5File from 'md5-file/promise'
export default async function build (dir, conf = null) {
const buildDir = join(tmpdir(), uuid.v4())
const compiler = await webpack(dir, { buildDir, conf })
try {
await runCompiler(compiler)
await writeBuildStats(buildDir)
await writeBuildId(buildDir)
} catch (err) {
console.error(`> Failed to build on ${buildDir}`)
throw err
}
await replaceCurrentBuild(dir, buildDir)
// no need to wait
del(buildDir, { force: true })
}
function runCompiler (compiler) {
return new Promise((resolve, reject) => {
compiler.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 writeBuildStats (dir) {
// Here we can't use hashes in webpack chunks.
// That's because the "app.js" is not tied to a chunk.
// It's created by merging a few assets. (commons.js and main.js)
// So, we need to generate the hash ourself.
const assetHashMap = {
'app.js': {
hash: await md5File(join(dir, '.next', 'app.js'))
}
}
const buildStatsPath = join(dir, '.next', 'build-stats.json')
await fs.writeFile(buildStatsPath, JSON.stringify(assetHashMap), 'utf8')
}
async function writeBuildId (dir) {
const buildIdPath = join(dir, '.next', 'BUILD_ID')
const buildId = uuid.v4()
await fs.writeFile(buildIdPath, buildId, 'utf8')
}