73 lines
1.9 KiB
TypeScript
73 lines
1.9 KiB
TypeScript
import { webpack } from 'next/dist/compiled/webpack/webpack'
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export type CompilerResult = {
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errors: string[]
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warnings: string[]
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}
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function generateStats(
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result: CompilerResult,
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stat: webpack.Stats
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): CompilerResult {
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const { errors, warnings } = stat.toJson('errors-warnings')
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if (errors.length > 0) {
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result.errors.push(...errors)
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}
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if (warnings.length > 0) {
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result.warnings.push(...warnings)
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}
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return result
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}
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// Webpack 5 requires the compiler to be closed (to save caches)
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// Webpack 4 does not have this close method so in order to be backwards compatible we check if it exists
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function closeCompiler(compiler: webpack.Compiler | webpack.MultiCompiler) {
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return new Promise<void>((resolve, reject) => {
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if ('close' in compiler) {
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// @ts-ignore Close only exists on the compiler in webpack 5
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return compiler.close((err: any) => (err ? reject(err) : resolve()))
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}
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resolve()
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})
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}
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export function runCompiler(
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config: webpack.Configuration | webpack.Configuration[]
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): Promise<CompilerResult> {
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return new Promise((resolve, reject) => {
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const compiler = webpack(config)
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compiler.run(
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(
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err: Error,
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statsOrMultiStats: { stats: webpack.Stats[] } | webpack.Stats
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) => {
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closeCompiler(compiler).then(() => {
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if (err) {
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const reason = err?.toString()
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if (reason) {
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return resolve({ errors: [reason], warnings: [] })
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}
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return reject(err)
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}
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if ('stats' in statsOrMultiStats) {
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const result: CompilerResult = statsOrMultiStats.stats.reduce(
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generateStats,
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{ errors: [], warnings: [] }
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)
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return resolve(result)
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}
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const result = generateStats(
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{ errors: [], warnings: [] },
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statsOrMultiStats
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)
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return resolve(result)
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})
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}
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)
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})
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}
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