56 lines
2.0 KiB
JavaScript
56 lines
2.0 KiB
JavaScript
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#!/usr/bin/env node
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/*
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* Copyright (C) 2023 - present Instructure, Inc.
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*
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* This file is part of Canvas.
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*
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* Canvas is free software: you can redistribute it and/or modify it under
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* the terms of the GNU Affero General Public License as published by the Free
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* Software Foundation, version 3 of the License.
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*
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* Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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* A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Affero General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* eslint-disable no-constant-condition */
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/* eslint-disable no-await-in-loop */
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const promisify = require('util').promisify
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const exec = promisify(require('child_process').exec)
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const BASELINE_CPU_UTILIZATION = 5.0
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/**
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* Utilize common command line utilities plus `docker stats` command to monitor Webpack
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*
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* The `docker stats` command gives us info about the current running containers. The third
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* column provides us with CPU utilization percentage. When webpack is running, this value
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* spikes. When webpack finishes processing, it typically falls to a value less than a few percent.
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*
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* This function monitors the utilization and sends a native MacOS alert when webpack finishes
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*/
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async function monitorWebpack() {
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let webpackFinished = false
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while (1) {
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const {stdout} = await exec("docker stats --no-stream | grep webpack | awk '{print $3}'")
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const currentUtilization = parseFloat(stdout.replace('%', ''))
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if (currentUtilization <= BASELINE_CPU_UTILIZATION && !webpackFinished) {
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webpackFinished = true
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exec(
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'osascript -e \'display notification "Canvas Webpack build finished" with title "Build Finished"\''
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)
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}
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if (currentUtilization > BASELINE_CPU_UTILIZATION && webpackFinished) {
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webpackFinished = false
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}
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}
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}
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monitorWebpack()
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