@karimsa/boa

boa

Toolkit for building backends in Node.js.

• Configuration
• Logger

Configuration

• Read string environment variable: Config.string('Redis.Password') - This will read the environment variable REDIS_PASSWORD and will error out if the value is empty.
• Read string environment variable with default value: Config.string('Redis.Password', 'blah') - This will try to read the environment variable REDIS_PASSWORD and will return blah if the value is empty.
• Read integer environment variable: Config.int('Redis.Port') - This will read the environment variable REDIS_PORT and try to cast it to an integer. If the casting fails or the value is empty, it will fail.

Preloaded variables:

• Config.NodeEnv -> process.env.NODE_ENV
• Config.isTestEnv -> true if NODE_ENV is set to test.
• Config.isDevelopmentEnv -> true if NODE_ENV is set to development.

Logger

The exported logger is a wrapper around a hidden winston logger, which by default logs to the console. The logging levels can be configured using the environment variable LOGGER_LEVEL - the default is to log warn and above. The levels are as follows:

• error
• warn
• info
• verbose

All loggers use util.format() & therefore whatever formatters are supported by your node version (see docs).

The logger also comes with some extra builtin utilities:

• errorf: creates an error object where the message is formatted using the formatter.
• fatalf: builds an error using errorf() then throws it.
• debug: takes a namespace as the first parameter and only logs the formatted message if that namespace is enabled using process.env.DEBUG.

import { logger } from '@karimsa/boa'

// errorf
const name = await fetchName()
const err = logger.errorf('Hello, %s', name)
// err = new Error('Hello, ' + name)

// fatalf
logger.fatalf('hello') // throw logger.errorf('hello')

// debug
logger.debug('myapi', 'hello, %s', name)

License

Licensed under MIT license.

Copyright (C) 2019-present Karim Alibhai.