typescript.ts

import {Configuration, loadConfiguration} from '../../backend/config-loader'
import {IPCClient} from '../../backend/worker/client'

import {processSourceMaps} from '../../exports'

import TypescriptAsset from 'parcel-bundler/src/assets/TypeScriptAsset'

class TSAsset extends TypescriptAsset {
	private readonly config: Promise<Configuration>

	constructor(name: string, options: any) {
		super(name, options)

		this.config = loadConfiguration(name, options.rootDir)
	}

	public async parse(): Promise<any> {
		const config = await this.config
		const reportErrors = !config.typescript.options.noEmitOnError
		const result = await IPCClient.compile({
			file: this.name,
			rootDir: this.options.rootDir,
			reportErrors
		})

		if(!reportErrors) {
			const {diagnostics} = result

			if(diagnostics) {
				console.error(diagnostics)

				// tslint:disable:no-string-throw
				throw 'TypeScript errors were found while compiling'
			}
		}

		this.contents = processSourceMaps(this, result.sources).js

		// Parse result as ast format through babylon
		return super.parse(this.contents)
	}

	public generateErrorMessage(err: any) {
		return err.stack || err.message || err
	}
}

export = TSAsset