/**
* A logger backed by [bunyan](https://github.com/trentm/node-bunyan)
*
* The default log level is `info`, but you can change it by setting the
* `LOG_LEVEL` environment variable to `trace`, `debug`, `info`, `warn`,
* `error`, or `fatal`.
*
* By default, logs are formatted for readability in development. If you intend
* to drain logs to a logging service, set `LOG_FORMAT=json`.
*
* **Note**: All execptions reported with `logger.error` will be forwarded to
* [sentry](https://github.com/getsentry/sentry) if the `SENTRY_DSN` environment
* variable is set.
*
* @typedef logger
*
* @example
*
* robot.log("This is an info message");
* robot.log.debug("…so is this");
* robot.log.trace("Now we're talking");
* robot.log.info("I thought you should know…");
* robot.log.warn("Woah there");
* robot.log.error("ETOOMANYLOGS");
* robot.log.fatal("Goodbye, cruel world!");
*/
const Logger = require('bunyan')
const bunyanFormat = require('bunyan-format')
const serializers = require('./serializers')
// Return a function that defaults to "info" level, and has properties for
// other levels:
//
// robot.log("info")
// robot.log.trace("verbose details");
//
Logger.prototype.wrap = function () {
const fn = this.info.bind(this);
// Add level methods on the logger
['trace', 'debug', 'info', 'warn', 'error', 'fatal'].forEach(level => {
fn[level] = this[level].bind(this)
})
// Expose `child` method for creating new wrapped loggers
fn.child = (attrs) => this.child(attrs, true).wrap()
// Expose target logger
fn.target = logger
return fn
}
const logger = new Logger({
name: 'probot',
level: process.env.LOG_LEVEL || 'info',
stream: bunyanFormat({outputMode: process.env.LOG_FORMAT || 'short'}),
serializers
})
module.exports = logger