node_modules/istanbul-api/lib/run-reports.js

/*
 Copyright 2012-2015, Yahoo Inc.
 Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
 */
var Reporter = require('./reporter'),
    fs = require('fs'),
    filesFor = require('./file-matcher').filesFor,
    libCoverage = require('istanbul-lib-coverage');

function run(formats, config, opts, callback) {
    if (!callback && typeof opts === 'function') {
        callback = opts;
        opts = {};
    }
    opts = opts || {};
    var root,
        coverageMap = libCoverage.createCoverageMap(),
        includePattern = opts.include || '**/coverage*.raw.json',
        reporter = new Reporter(config);

    if (!formats || formats.length === 0) {
        formats = config.reporting.reports();
    }
    try {
        reporter.addAll(formats);
    } catch (ex) {
        ex.inputError = true;
        return callback(ex);
    }

    root = opts.root || process.cwd();
    filesFor(
        {
            root: root,
            includes: [includePattern]
        },
        function(err, files) {
            /* istanbul ignore if */
            if (err) {
                return callback(err);
            }
            files.forEach(function(file) {
                var coverageObject = JSON.parse(fs.readFileSync(file, 'utf8'));
                coverageMap.merge(coverageObject);
            });
            reporter.write(coverageMap, {});
            return callback();
        }
    );
}

module.exports = {
    run: run
};