Gulp Regex scanner

gulpfile.js

var gulp = require('gulp');
var regexScanner = require('./regex-scanner');

gulp.task('find-usage:myprefix', function() {
    // Répertoire où se situe les sources
    var sourceFolder= './application/';

    // Les fichiers sources à vérifier
    var filesToCheck= [
        sourceFolder+ '**/*.ts',
        sourceFolder +'**/*.html',
        sourceFolder +'**/*.less'
    ];

    // Liste d'expressions régulières àrechercher
    var regexpKeywords= [
        '\\.module\\([^)]+\\)',
        '\\.directive\\([^)]+\\)'
        // ...
    ];

    gulp.src(filesToCheck, {base: sourceFolder})
        .pipe(regexScanner(regexpKeywords))
        .pipe(regexScanner.reporter()); // TODO adapterle reporter pour l'intégrer dans TFS
}); 

regex-scanner.js

var through = require('through2');
var gutil = require('gulp-util');
var PluginError = gutil.PluginError;

const PLUGIN_NAME = 'gulp-regex-scanner';

function regexScanner(regexp) {
    if (!regexp) {
        throw new PluginError(PLUGIN_NAME, 'Missing regexp to search!');
    }
    if (Array.isArray(regexp)) {
        regexp = "(" + regexp.join(')|(') + ")";
    }

    regexp = new RegExp(regexp, 'g');

    // creating a stream through which each file will pass
    return through.obj(function (file, enc, cb) {
        if (file.isStream()) {
            this.emit('error', new PluginError(PLUGIN_NAME, 'Streams are not supported!'));
            return cb();
        }

        file.matches = file.matches || [];

        if (file.isBuffer()) {
            var lines = file.contents.toString().split('\n');
            lines.forEach(function (line, index) {
                var matches = line.match(regexp);
                if (matches) {
                    matches.forEach(function (match) {
                        file.matches.push({
                            file: file.relative,
                            lineNumber: index + 1,
                            match: match,
                            line: line
                        });
                    })
                }
            });
        }

        // make sure the file goes through the next gulp plugin
        this.push(file);

        // tell the stream engine that we are done with this file
        cb();
    });
}

regexScanner.reporter = function (rpt) {
    if (!rpt || rpt === 'default') {
        // Reporter par défaut, log dans la console
        rpt = function (result) {
            result.matches.forEach(function (match) {
                gutil.log(match.file + ":" + match.lineNumber + ":" + match.line.replace(match.match, gutil.colors.red(match.match)));
            });
        }
    }

    return through.obj(function (file, enc, cb) {
        var matches = file.matches;

        if (Array.isArray(matches) && matches.length > 0) {
            var result = {matches: matches};
            rpt(result);
        }

        cb(null, file);
    });
};

// exporting the plugin main function
module.exports = regexScanner;