An environment-aware config system.
npm install @genx/configAn environment-aware config system.
- Multiple data source.
- Deep override.
- Rewrite config.
- Support interpolation: ES6 string template, Javascript value
let fileSource = new JsonConfigProvider('path/to/config.json');
let config = new ConfigLoader(fileSource);
await config.load_()...;
let dbSource = new DbConfigProvider(config.data.dbConnection);
config.provider = dbSource;
await config.reload_()...;
// same as: let envAwareLoader = new ConfigLoader(
// new (EnvAwareConfigProviderF('.json', JsonConfigProvider, 'default'))('config/dir', 'app', 'production')
// );
let envAwareLoader = ConfigLoader.createEnvAwareJsonLoader('config/dir', 'app', 'production');
// Loader will load config/dir/app.default.json first,
// and then load config/dir/app.production.json,
// and finally override the default.
let cfg = await envAwareLoader.load_();
``
// config
{
"key": "#!jst:Hello ${name}, welcome to ${place}!",
"key2": {
"array": [
"#!jst:value1: ${value1}",
"#!jst:value2: ${value2}",
"#!jst:sum: ${value1 + value2}"
],
"object": {
"non": "nothing",
"itpl": "#!jst:${(new Date()).toString()}"
},
"jsv1": "#!jsv:100+200*0.5",
"jsv2": "#!jsv:[name, place].join(' ')",
"jsv3": "#!swig: {{ name }} - {{ place }} "
}
}
await config.load_({ name: 'Bob', place: 'Sydney', value1: 10, value2: 20 });
// result
{
key: 'Hello Bob, welcome to Sydney!',
key2: {
array: [ 'value1: 10', 'value2: 20', 'sum: 30' ],
object: {
non: 'nothing',
itpl: 'Tue Feb 21 2023 21:00:39 GMT+1100 (Australian Eastern Daylight Time)'
},
jsv1: 200,
jsv2: 'Bob Sydney',
jsv3: 'Bob - Sydney'
}
}
``
MIT