kobp/lib/esm/src/utils/env.js

Koa Boilerplate with MikroORM

import { isNil } from 'lodash';
function _env(envKey, defaultValue, src = process.env) {
    const val = src[`${envKey}`];
    if (isNil(val)) {
        if (defaultValue === 'requiredString' || defaultValue === 'requiredNumber' || defaultValue === 'requiredBoolean') {
            throw new Error(`ENVIRONMENT "${envKey}" (${envKey.length}) is required but not yet defined.`);
        }
        return defaultValue;
    }
    if (defaultValue === 'requiredNumber' || typeof defaultValue === 'number') {
        const numberVal = +val;
        if (isNaN(numberVal)) {
            throw new Error(`ENVIRONMENT "${envKey}" (${envKey.length}) should be numeric value but provided as "${val}" (Not a Number).`);
        }
        return numberVal;
    }
    if (defaultValue === 'requiredBoolean' || typeof defaultValue === 'boolean') {
        const booleanVal = /^(yes|true|1)$/i.test(`${val}`);
        return booleanVal;
    }
    return val;
}
export const env = {
    s: (envKey, defaultValue) => _env(envKey, typeof defaultValue === 'undefined' ? 'requiredString' : defaultValue),
    b: (envKey, defaultValue) => _env(envKey, typeof defaultValue === 'undefined' ? 'requiredBoolean' : defaultValue),
    n: (envKey, defaultValue) => _env(envKey, typeof defaultValue === 'undefined' ? 'requiredNumber' : defaultValue),
};
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