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index.js
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Created: Fri, Jul 4, 09:32

index.js
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	/*
	Copyright 2012-2015, Yahoo Inc.
	Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
	*/
	'use strict';
	const { ReportBase } = require('istanbul-lib-report');

	class LcovOnlyReport extends ReportBase {
	constructor(opts) {
	super();
	opts = opts \|\| {};
	this.file = opts.file \|\| 'lcov.info';
	this.projectRoot = opts.projectRoot \|\| process.cwd();
	this.contentWriter = null;
	}

	onStart(root, context) {
	this.contentWriter = context.writer.writeFile(this.file);
	}

	onDetail(node) {
	const fc = node.getFileCoverage();
	const writer = this.contentWriter;
	const functions = fc.f;
	const functionMap = fc.fnMap;
	const lines = fc.getLineCoverage();
	const branches = fc.b;
	const branchMap = fc.branchMap;
	const summary = node.getCoverageSummary();
	const path = require('path');

	writer.println('TN:');
	const fileName = path.relative(this.projectRoot, fc.path);
	writer.println('SF:' + fileName);

	Object.values(functionMap).forEach(meta => {
	// Some versions of the instrumenter in the wild populate 'loc'
	// but not 'decl':
	const decl = meta.decl \|\| meta.loc;
	writer.println('FN:' + [decl.start.line, meta.name].join(','));
	});
	writer.println('FNF:' + summary.functions.total);
	writer.println('FNH:' + summary.functions.covered);

	Object.entries(functionMap).forEach(([key, meta]) => {
	const stats = functions[key];
	writer.println('FNDA:' + [stats, meta.name].join(','));
	});

	Object.entries(lines).forEach(entry => {
	writer.println('DA:' + entry.join(','));
	});
	writer.println('LF:' + summary.lines.total);
	writer.println('LH:' + summary.lines.covered);

	Object.entries(branches).forEach(([key, branchArray]) => {
	const meta = branchMap[key];
	if (meta) {
	const { line } = meta.loc.start;
	branchArray.forEach((b, i) => {
	writer.println('BRDA:' + [line, key, i, b].join(','));
	});
	} else {
	console.warn('Missing coverage entries in', fileName, key);
	}
	});
	writer.println('BRF:' + summary.branches.total);
	writer.println('BRH:' + summary.branches.covered);
	writer.println('end_of_record');
	}

	onEnd() {
	this.contentWriter.close();
	}
	}

	module.exports = LcovOnlyReport;

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