rollup-plugin-istanbul/dist/rollup-plugin-istanbul.mjs

Seamless integration between Rollup and Istanbul.

import { createFilter } from '@rollup/pluginutils';
import istanbul from 'istanbul-lib-instrument';

function addDefaultOptions(options) {
	return Object.assign(
		{
			esModules: true,
			compact: true,
			produceSourceMap: true,
			autoWrap: true,
			preserveComments: true,
		},
		options,
	)
}

function index (options = {}) {
	const filter = createFilter(options.include, options.exclude);

	return {
		name: "istanbul",
		transform(code, id) {
			if (!filter(id)) {
				return
			}

			const instrumenterConfig = addDefaultOptions(options.instrumenterConfig);

			const instrumenter = new (
				options.instrumenter || istanbul
			).createInstrumenter(instrumenterConfig);

			const { version, sources, sourcesContent, names, mappings, file } =
				this.getCombinedSourcemap();

			const instrumentedCode = instrumenter.instrumentSync(code, id, {
				version,
				sources,
				sourcesContent,
				names,
				mappings,
				file,
			});

			return { code: instrumentedCode, map: instrumenter.lastSourceMap() }
		},
	}
}

export { index as default };