egg-extra-config v0.0.1

egg-extra-config

Loading config file outside eggjs project path. Watching this file's changes and auto reloading configurations of app.config without restarting process.

Install

npm install egg-extra-config

Usage

// plugin.js
exports.extraConfig = {
  enable: true,
  package: 'egg-extra-config',
};

Configuration

Configure information in ${app_root}/config/config.default.js:

Paths

Support directory path.

chokidar#paths(string or array of strings). Paths to files, dirs to be watched recursively, or glob patterns.

Single path

config.extraConfig: {
  paths: '/your/custom/config/path/config.js',
};

Multi paths

These files' config reloading has no priority.

However, the same configuration will be overrided in the order of the array only during application starting.

config.extraConfig: {
  paths: [
    '/etc/path/config.js',
    '/etc/path/dir/',
    '/etc/path/this-file-might-override-the-above-files.js',
  ],
};

Extensions

Used to restrict file types.

By default, configuration will be loaded by require, this could be dangerous because functions can be executed in a .js file.

If you do not want the runtime environment to be destoryed, it is highly recommended to configure extensions as ['.json'].

config.extraConfig: {
  paths: [
    '/etc/path1/',
    '/etc/path2/',
  ],
  extensions: [ '.json' ],
};

TODO

• 按照egg的生命周期，应该在configDidLoad()前完成自定义配置的加载，目前放在app.beforeStart()
• 限制只能重载项目config目录内、或不在app.config内的配置
• 日志记录变更值
• 优化配置加载过程
• IPC

DONE

• 监听特定目录或文件变更，将变动应用于配置的重载
• 在app.ready()前完成自定义配置的加载，借助了app.beforeStart()
• 优化拷贝过程，支持嵌套对象的内部变更
• 删除自定义配置后，重新加载项目内对应配置
• 支持配置多个文件，参考chokidar API#paths：(string or array of strings) "Paths to files, dirs to be watched recursively, or glob patterns"。 但不做优先级处理，仅在配置加载过程中按照数组顺序来覆盖相同配置。
• 支持目录，以egg的方式加载其中配置，通过require.resolve修正路径，按照module的形式读取
• 限制文件类型(可选)，例如只监视.json，避免.js文件破坏运行状态
• 文件变更防抖动