nodejs/github-bot

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	'use strict'

	const logger = require('./lib/logger')
	const child_process = require('child_process')

	if (process.env.NODE_REPO_DIR) {
	const fs = require('fs')
	global._node_repo_dir = fs.realpathSync(process.env.NODE_REPO_DIR)
	const out = child_process.spawnSync('git', ['status'], { cwd: global._node_repo_dir })

	if (out.status !== 0) {
	logger.info(out.stdout)
	logger.error(out.stderr)
	logger.error('Bad NODE_REPO_DIR. Backport patch testing disabled.')
	global._node_repo_dir = false
	}
	}

	const port = process.env.PORT \|\| 3000
	const app = require('./app')

	app.listen(port, () => {
	logger.info('Listening on port', port)
	})

	// may open up an SSE relay channel helpful for local debugging
	// of github repository events, wo/having to deploy changes
	if (process.env.SSE_RELAY) {
	const EventSource = require('eventsource')
	const es = new EventSource(process.env.SSE_RELAY)
	es.onmessage = (e) => {
	try {
	const data = JSON.parse(e.data)
	if (!data.action) return

	app.emitGhEvent(data, logger)
	} catch (e) {
	logger.error('Error while receiving SSE relay message', e)
	}
	}
	}

	function logUnhandledException (err) {
	logger.fatal(err, 'Unchaught exception, terminating bot process immediately')

	// leave time for error to be written to disk before exiting process
	setTimeout(() => process.exit(1), 10)
	}

	process.on('uncaughtException', logUnhandledException)
	process.on('unhandledRejection', logUnhandledException)