@imqueue/async-logger/src/helpers/env.js

Configurable async logger over winston for @imqueue services

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.pkg = pkg;
exports.transportsConfig = transportsConfig;
exports.defaultMetadata = defaultMetadata;
const path_1 = require("path");
const fs_1 = require("fs");
const RX_NAME = /%name/g;
const RX_VERSION = /%version/g;
/**
 * Retrieve package name and version from package.json of running service
 *
 * @returns {name: string, value: string} - return package name and version
 */
function pkg() {
    const pkgPath = (0, path_1.resolve)(process.cwd(), 'package.json');
    const { name, version } = (0, fs_1.existsSync)(pkgPath)
        ? require(pkgPath)
        : { name: 'logger', version: '' };
    return { name, version };
}
/**
 * Used for retrieve transport config from environment variables
 *
 * @returns {TransportOptions[]}
 */
function transportsConfig() {
    const { name, version } = pkg();
    try {
        return JSON.parse((process.env.LOGGER_TRANSPORTS || '[]')
            .replace(RX_NAME, name)
            .replace(RX_VERSION, version));
    }
    catch (err) {
        throw new TypeError(`Logger: can not parse transports config: ${err.stack ? err.stack : err.message}`);
    }
}
/**
 * Returns default metadata, configured by environment variables
 *
 * @returns {JsonObject}
 */
function defaultMetadata() {
    const { name, version } = pkg();
    try {
        return JSON.parse((process.env.LOGGER_METADATA || '{}')
            .replace(RX_NAME, name)
            .replace(RX_VERSION, version));
    }
    catch (err) {
        throw new TypeError(`Logger: can not parse metadata: ${err.stack ? err.stack : err.message}`);
    }
}
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