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#!/usr/bin/env node
import * as fs from 'fs';
import lernaGetPackages = require('lerna-get-packages');
import * as _ from 'lodash';
import * as moment from 'moment';
import * as path from 'path';
import { exec as execAsync, spawn } from 'promisify-child-process';
import semverDiff = require('semver-diff');
import semverSort = require('semver-sort');
import { constants } from './constants';
import { Changelog, Changes, SemVerIndex, UpdatedPackage } from './types';
import { utils } from './utils';
const IS_DRY_RUN = true;
const TODAYS_TIMESTAMP = moment().unix();
const LERNA_EXECUTABLE = './node_modules/lerna/bin/lerna.js';
const semverNameToIndex: { [semver: string]: number } = {
patch: SemVerIndex.Patch,
minor: SemVerIndex.Minor,
major: SemVerIndex.Major,
};
(async () => {
const updatedPublicPackages = await getPublicLernaUpdatedPackagesAsync();
const updatedPackageNames = _.map(updatedPublicPackages, pkg => pkg.name);
const allLernaPackages = lernaGetPackages(constants.monorepoRootPath);
const relevantLernaPackages = _.filter(allLernaPackages, pkg => {
return _.includes(updatedPackageNames, pkg.package.name);
});
const relevantPackageNames = _.map(relevantLernaPackages, pkg => pkg.package.name);
utils.log(`Will update CHANGELOGs and publish: \n${relevantPackageNames.join('\n')}\n`);
const packageToVersionChange: { [name: string]: string } = {};
_.each(relevantLernaPackages, lernaPackage => {
const packageName = lernaPackage.package.name;
const changelogJSONPath = path.join(lernaPackage.location, 'CHANGELOG.json');
const changelogJSON = getChangelogJSONOrCreateIfMissing(lernaPackage.package.name, changelogJSONPath);
let changelogs: Changelog[];
try {
changelogs = JSON.parse(changelogJSON);
} catch (err) {
throw new Error(
`${lernaPackage.package.name}'s CHANGELOG.json contains invalid JSON. Please fix and try again.`,
);
}
const currentVersion = lernaPackage.package.version;
const shouldAddNewEntry = shouldAddNewChangelogEntry(changelogs);
if (shouldAddNewEntry) {
// Create a new entry for a patch version with generic changelog entry.
const nextPatchVersion = utils.getNextPatchVersion(currentVersion);
const newChangelogEntry: Changelog = {
timestamp: TODAYS_TIMESTAMP,
version: nextPatchVersion,
changes: [
{
note: 'Dependencies updated',
},
],
};
changelogs = [newChangelogEntry, ...changelogs];
packageToVersionChange[packageName] = semverDiff(currentVersion, nextPatchVersion);
} else {
// Update existing entry with timestamp
const lastEntry = changelogs[0];
if (_.isUndefined(lastEntry.timestamp)) {
lastEntry.timestamp = TODAYS_TIMESTAMP;
}
// Check version number is correct.
const proposedNextVersion = lastEntry.version;
lastEntry.version = updateVersionNumberIfNeeded(currentVersion, proposedNextVersion);
changelogs[0] = lastEntry;
packageToVersionChange[packageName] = semverDiff(currentVersion, lastEntry.version);
}
// Save updated CHANGELOG.json
fs.writeFileSync(changelogJSONPath, JSON.stringify(changelogs, null, '\t'));
utils.log(`${packageName}: Updated CHANGELOG.json`);
// Generate updated CHANGELOG.md
const changelogMd = generateChangelogMd(changelogs);
const changelogMdPath = path.join(lernaPackage.location, 'CHANGELOG.md');
fs.writeFileSync(changelogMdPath, changelogMd);
utils.log(`${packageName}: Updated CHANGELOG.md`);
});
if (!IS_DRY_RUN) {
await execAsync(`git add . --all`, { cwd: constants.monorepoRootPath });
await execAsync(`git commit -m "Updated CHANGELOGS"`, { cwd: constants.monorepoRootPath });
await execAsync(`git push`, { cwd: constants.monorepoRootPath });
utils.log(`Pushed CHANGELOG updates to Github`);
}
await lernaPublishAsync(packageToVersionChange);
})().catch(err => {
utils.log(err);
process.exit(1);
});
async function lernaPublishAsync(packageToVersionChange: { [name: string]: string }) {
// HACK: Lerna publish does not provide a way to specify multiple package versions as
// flags so instead we need to interact with their interactive prompt interface.
const child = spawn('lerna', ['publish'], { cwd: constants.monorepoRootPath });
child.stdout.on('data', (data: Buffer) => {
const output = data.toString('utf8');
const isVersionPrompt = _.includes(output, 'Select a new version');
if (isVersionPrompt) {
const outputStripLeft = output.split('new version for ')[1];
const packageName = outputStripLeft.split(' ')[0];
let versionChange = packageToVersionChange[packageName];
const isPrivatePackage = _.isUndefined(versionChange);
if (isPrivatePackage) {
versionChange = 'patch'; // Always patch updates to private packages.
}
child.stdin.write(`${semverNameToIndex[versionChange]}\n`);
}
const isFinalPrompt = _.includes(output, 'Are you sure you want to publish the above changes?');
if (isFinalPrompt && !IS_DRY_RUN) {
child.stdin.write(`y\n`);
}
});
}
async function getPublicLernaUpdatedPackagesAsync(): Promise<UpdatedPackage[]> {
const result = await execAsync(`${LERNA_EXECUTABLE} updated --json`, { cwd: constants.monorepoRootPath });
const updatedPackages = JSON.parse(result.stdout);
const updatedPublicPackages = _.filter(updatedPackages, updatedPackage => !updatedPackage.private);
return updatedPublicPackages;
}
function updateVersionNumberIfNeeded(currentVersion: string, proposedNextVersion: string) {
if (proposedNextVersion === currentVersion) {
return utils.getNextPatchVersion(currentVersion);
}
const sortedVersions = semverSort.desc([proposedNextVersion, currentVersion]);
if (sortedVersions[0] !== proposedNextVersion) {
return utils.getNextPatchVersion(currentVersion);
}
return proposedNextVersion;
}
function getChangelogJSONOrCreateIfMissing(packageName: string, changelogPath: string): string {
let changelogJSON: string;
try {
changelogJSON = fs.readFileSync(changelogPath, 'utf-8');
return changelogJSON;
} catch (err) {
// If none exists, create new, empty one.
const emptyChangelogJSON = JSON.stringify([]);
fs.writeFileSync(changelogPath, emptyChangelogJSON);
return emptyChangelogJSON;
}
}
function shouldAddNewChangelogEntry(changelogs: Changelog[]): boolean {
if (_.isEmpty(changelogs)) {
return true;
}
const lastEntry = changelogs[0];
return !!lastEntry.isPublished;
}
function generateChangelogMd(changelogs: Changelog[]): string {
let changelogMd = `<!--
This file is auto-generated using the monorepo-scripts package. Don't edit directly.
Edit the package's CHANGELOG.json file only.
-->
CHANGELOG
`;
_.each(changelogs, changelog => {
if (_.isUndefined(changelog.timestamp)) {
throw new Error(
'All CHANGELOG.json entries must be updated to include a timestamp before generating their MD version',
);
}
const date = moment(`${changelog.timestamp}`, 'X').format('MMMM D, YYYY');
const title = `\n## v${changelog.version} - _${date}_\n\n`;
changelogMd += title;
let changes = '';
_.each(changelog.changes, change => {
let line = ` * ${change.note}`;
if (!_.isUndefined(change.pr)) {
line += ` (#${change.pr})`;
}
line += '\n';
changes += line;
});
changelogMd += `${changes}`;
});
return changelogMd;
}
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