Class Bundle

benchmark/data.js:832–1056

}
const hasOwnProp = Object.prototype.hasOwnProperty;
class Bundle {
	constructor(options = {}) {
		this.intro = options.intro || '';
		this.separator = options.separator !== void 0 ? options.separator : '\n';
		this.sources = [];
		this.uniqueSources = [];
		this.uniqueSourceIndexByFilename = {};
	}
	addSource(source) {
		if (source instanceof MagicString) {
			return this.addSource({
				content: source,
				filename: source.filename,
				separator: this.separator,
			});
		}
		if (!isObject(source) || !source.content) {
			throw new Error(
				'bundle.addSource() takes an object with a `content` property, which should be an instance of MagicString, and an optional `filename`',
			);
		}
		['filename', 'indentExclusionRanges', 'separator'].forEach((option) => {
			if (!hasOwnProp.call(source, option)) source[option] = source.content[option];
		});
		if (source.separator === void 0) {
			source.separator = this.separator;
		}
		if (source.filename) {
			if (!hasOwnProp.call(this.uniqueSourceIndexByFilename, source.filename)) {
				this.uniqueSourceIndexByFilename[source.filename] = this.uniqueSources.length;
				this.uniqueSources.push({ filename: source.filename, content: source.content.original });
			} else {
				const uniqueSource = this.uniqueSources[this.uniqueSourceIndexByFilename[source.filename]];
				if (source.content.original !== uniqueSource.content) {
					throw new Error(`Illegal source: same filename (${source.filename}), different contents`);
				}
			}
		}
		this.sources.push(source);
		return this;
	}
	append(str, options) {
		this.addSource({
			content: new MagicString(str),
			separator: (options && options.separator) || '',
		});
		return this;
	}
	clone() {
		const bundle = new Bundle({
			intro: this.intro,
			separator: this.separator,
		});
		this.sources.forEach((source) => {
			bundle.addSource({
				filename: source.filename,
				content: source.content.clone(),
				separator: source.separator,