js/gulp/clean-task.js

// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

const del = require('del');
const { targetDir } = require('./util');
const { memoizeTask } = require('./memoize-task');
const { Observable, ReplaySubject } = require('rxjs');

const cleanTask = ((cache) => memoizeTask(cache, function clean(target, format) {
    return Observable
        .from(del(`${targetDir(target, format)}/**`))
        .catch((e) => Observable.empty())
        .multicast(new ReplaySubject()).refCount();
}))({});

module.exports = cleanTask;
module.exports.cleanTask = cleanTask;