@communities-webruntime/services/dist/es/utils/observable-folder-hash.js

If you would like to run Lightning Web Runtime without the CLI, we expose some of our programmatic APIs available in Node.js. If you're looking for the CLI documentation [you can find that here](https://www.npmjs.com/package/@communities-webruntime/cli).

/** @hidden */
/**
 * Copyright (c) 2019, salesforce.com, inc.
 * All rights reserved.
 * SPDX-License-Identifier: MIT
 * For full license text, see the LICENSE file in the repo root or https://opensource.org/licenses/MIT
 */
import path from 'path';
import chokidar from 'chokidar';
import { hashElement } from 'folder-hash';
const options = {
    algo: 'md5',
    encoding: 'hex',
};
async function doHash(target) {
    return (await hashElement(target, options)).hash;
}
/**
 * Gets a folder hash as an observable.
 *
 * @param {string} target The directory to compute the version key for
 * @returns An observable that will notify observers when the folder hash changes
 */
export default async function folderHash(target) {
    // Chokidar/picomatch don't like relative paths starting with `./`, see #857
    const absoluteTarget = path.resolve(target);
    const hash = await doHash(absoluteTarget);
    return {
        subscribe(observer) {
            observer.next(hash);
            const watcher = chokidar.watch(absoluteTarget).on('change', async () => {
                const newHash = await doHash(absoluteTarget);
                observer.next(newHash);
            });
            return {
                unsubscribe: () => {
                    watcher.close();
                },
            };
        },
    };
}
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