lilacs/gulp/tasks/clean.js

A web frontend building tool for teamwork, with automaticly compiling, merging, minifying, syncing files to server, supporting distributed servers, ensuring css or html files' inline reference with correct absolute path, and more.

var fsExtra = require('fs-extra');
var _ = require('lodash');
var rd = require('rd');
var vars = require('../../data/vars');
var pathUtil = require('../../util/path');
var extractHashCodes = require('../../util/extract_hash_codes');
var cleanData = require('../../data/clean');
var cleanMatches = require('../../util/clean_matches');

module.exports = (gulp) => {

    // here should be named function, otherwise in the command line will show anonymous function
    var doClean = (cb) => {

        // all hash codes
        var hashCodes = _.uniq(extractHashCodes(cleanData.config.hashLength));
        var deletedFilesCount = 0;

        var doDelete = (dir) => {
            rd.eachFileFilterSync(dir, (file) => {
                // file path
                var filePath = pathUtil.replaceBackSlash(file);
                var lastSlashIndex = filePath.lastIndexOf('/');
                var fileName = lastSlashIndex == -1 ? filePath: filePath.slice(lastSlashIndex + 1);

                var regExp = cleanMatches.newFileName(cleanData.config.hashLength);
                var result = regExp.exec(fileName);
                if (!result) return;

                // not in use, remove it
                if (hashCodes.indexOf(result[1]) < 0) {
                    fsExtra.removeSync(file);
                    logger.info('deleted file: ' + file);
                    deletedFilesCount += 1;
                }
            });
        };

        // css directory
        doDelete(vars.projectRoot + '/dist/css');
        // js directory
        doDelete(vars.projectRoot + '/dist/js');

        deletedFilesCount && logger.log('');
        logger.success(`${deletedFilesCount} redundant files are deleted successfully.`);

        cb();
    };

    // register clean task
    gulp.task('clean', gulp.series('pre_archive', doClean));
};