Common Cache Path

Finding the best and standard place to store cache. Especially useful for library authors. A smarter and more customizable alternative to find-cache-dir.

Difference

• Zero config with smart defaults.
• Smart resolution of namespace without the need to manually specify via the name option.
• Default shared cache directory sits in <ProjectRoot>/.cache instead of <ProjectRoot>/node_modules/.cache to support Yarn PnP and avoid modifying node_modules.
• Cache location can be overridden to other places to enable easier testing and greater flexibility. For example, when using Netlify with webpack loaders and plugins, the data can be written directly into /opt/build/cache/ to enable cross-build caching.

Installation

yarn add common-cache-path

Usage

import fs from 'fs';
import { commonCachePath } from 'common-cache-path';

// Assume that
// 1. process.cwd is /users/abc/project/app
// 2. this file is in /users/abc/project/app/node_modules/@foo/bar/lib/index.js
const resolvePath = commonCachePath();
fs.writefileSync(resolvePath('some/file.txt'), 'content');
// /users/abc/project/app/.cache/@foo/bar/some/file.txt is created with content 'content'

Options

Shared Cache Directory

dirname: string
The name of the shared cache directory (or a path relative to the root directory of the project that uses your library).
Optional. The default value is .cache.

Namespace

namespace: string
The namespace of your cache directory. Your cache directory is a child directory inside a shared cache directory. This helps prevent conflict among multiple cache users.
Optional. By default, its value is resolved by finding the package name in the name field of the closest package.json to the caller script of commonCachePath().
For example, if your library calls commonCachePath in node_modules/@foo/bar/lib/index.js, the name field of node_modules/@foo/bar/package.json is used as default namespace.

To make sure that different libraries do not interfere with each other. You are strongly suggested to leave it as default.

Current Working Directory

cwd: string
The path of directory that project root searching should start from.
Optional. The default value is process.cwd().

Issues and Feedback

Please voice your opinion and report bugs in the issues sections of this GitHub project.

Contributing

You are more than welcome to add more functionalities, improve documentation, fix bugs, and anything you think is needed. The build step is pretty self-explanatory. Please refer to CONTRIBUTING.md for more details.

License

MIT