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dangerfile.js 5.95 KB
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zhangrenyang 提交于 2020-04-05 18:38 . 1.init
/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
'use strict';
// Hi, if this is your first time editing/reading a Dangerfile, here's a summary:
// It's a JS runtime which helps you provide continuous feedback inside GitHub.
//
// You can see the docs here: http://danger.systems/js/
//
// If you want to test changes Danger, I'd recommend checking out an existing PR
// and then running the `danger pr` command.
//
// You'll need a GitHub token, you can re-use this one:
//
// e622517d9f1136ea8900 07c6373666312cdfaa69
//
// (Just remove the space)
//
// So, for example:
//
// `DANGER_GITHUB_API_TOKEN=[ENV_ABOVE] yarn danger pr https://github.com/facebook/react/pull/11865
const {markdown, danger} = require('danger');
const fetch = require('node-fetch');
const {generateResultsArray} = require('./scripts/rollup/stats');
const {readFileSync} = require('fs');
const {exec} = require('child_process');
const currentBuildResults = JSON.parse(
readFileSync('./scripts/rollup/results.json')
);
/**
* Generates a Markdown table
* @param {string[]} headers
* @param {string[][]} body
*/
function generateMDTable(headers, body) {
const tableHeaders = [
headers.join(' | '),
headers.map(() => ' --- ').join(' | '),
];
const tablebody = body.map(r => r.join(' | '));
return tableHeaders.join('\n') + '\n' + tablebody.join('\n');
}
/**
* Generates a user-readable string from a percentage change
* @param {number} change
* @param {boolean} includeEmoji
*/
function addPercent(change, includeEmoji) {
if (!isFinite(change)) {
// When a new package is created
return 'n/a';
}
const formatted = (change * 100).toFixed(1);
if (/^-|^0(?:\.0+)$/.test(formatted)) {
return `${formatted}%`;
} else {
if (includeEmoji) {
return `:small_red_triangle:+${formatted}%`;
} else {
return `+${formatted}%`;
}
}
}
function setBoldness(row, isBold) {
if (isBold) {
return row.map(element => `**${element}**`);
} else {
return row;
}
}
/**
* Gets the commit that represents the merge between the current branch
* and master.
*/
function git(args) {
return new Promise(res => {
exec('git ' + args, (err, stdout, stderr) => {
if (err) {
throw err;
} else {
res(stdout.trim());
}
});
});
}
(async function() {
// Use git locally to grab the commit which represents the place
// where the branches differ
const upstreamRepo = danger.github.pr.base.repo.full_name;
const upstreamRef = danger.github.pr.base.ref;
await git(`remote add upstream https://github.com/${upstreamRepo}.git`);
await git('fetch upstream');
const mergeBaseCommit = await git(`merge-base HEAD upstream/${upstreamRef}`);
const commitURL = sha =>
`http://react.zpao.com/builds/master/_commits/${sha}/results.json`;
const response = await fetch(commitURL(mergeBaseCommit));
// Take the JSON of the build response and
// make an array comparing the results for printing
const previousBuildResults = await response.json();
const results = generateResultsArray(
currentBuildResults,
previousBuildResults
);
const packagesToShow = results
.filter(
r =>
Math.abs(r.prevFileSizeAbsoluteChange) >= 300 || // bytes
Math.abs(r.prevGzipSizeAbsoluteChange) >= 100 // bytes
)
.map(r => r.packageName);
if (packagesToShow.length) {
let allTables = [];
// Highlight React and React DOM changes inline
// e.g. react: `react.production.min.js`: -3%, `react.development.js`: +4%
if (packagesToShow.includes('react')) {
const reactProd = results.find(
r => r.bundleType === 'UMD_PROD' && r.packageName === 'react'
);
if (
reactProd.prevFileSizeChange !== 0 ||
reactProd.prevGzipSizeChange !== 0
) {
const changeSize = addPercent(reactProd.prevFileSizeChange, true);
const changeGzip = addPercent(reactProd.prevGzipSizeChange, true);
markdown(`React: size: ${changeSize}, gzip: ${changeGzip}`);
}
}
if (packagesToShow.includes('react-dom')) {
const reactDOMProd = results.find(
r => r.bundleType === 'UMD_PROD' && r.packageName === 'react-dom'
);
if (
reactDOMProd.prevFileSizeChange !== 0 ||
reactDOMProd.prevGzipSizeChange !== 0
) {
const changeSize = addPercent(reactDOMProd.prevFileSizeChange, true);
const changeGzip = addPercent(reactDOMProd.prevGzipSizeChange, true);
markdown(`ReactDOM: size: ${changeSize}, gzip: ${changeGzip}`);
}
}
// Show a hidden summary table for all diffs
// eslint-disable-next-line no-var,no-for-of-loops/no-for-of-loops
for (var name of new Set(packagesToShow)) {
const thisBundleResults = results.filter(r => r.packageName === name);
const changedFiles = thisBundleResults.filter(
r => r.prevFileSizeChange !== 0 || r.prevGzipSizeChange !== 0
);
const mdHeaders = [
'File',
'Filesize Diff',
'Gzip Diff',
'Prev Size',
'Current Size',
'Prev Gzip',
'Current Gzip',
'ENV',
];
const mdRows = changedFiles.map(r => {
const isProd = r.bundleType.includes('PROD');
return setBoldness(
[
r.filename,
addPercent(r.prevFileSizeChange, isProd),
addPercent(r.prevGzipSizeChange, isProd),
r.prevSize,
r.prevFileSize,
r.prevGzip,
r.prevGzipSize,
r.bundleType,
],
isProd
);
});
allTables.push(`\n## ${name}`);
allTables.push(generateMDTable(mdHeaders, mdRows));
}
const summary = `
<details>
<summary>Details of bundled changes.</summary>
<p>Comparing: ${mergeBaseCommit}...${danger.github.pr.head.sha}</p>
${allTables.join('\n')}
</details>
`;
markdown(summary);
}
})();
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