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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 } from 'promisify-child-process';
import semverSort = require('semver-sort');
import { Changelog, Changes, UpdatedPackage } from './types';
import { utils } from './utils';
const MONOREPO_ROOT_PATH = path.join(__dirname, '../../..');
const TODAYS_TIMESTAMP = moment().unix();
(async () => {
const updatedPublicPackages = await getPublicLernaUpdatedPackagesAsync();
const updatedPackageNames = _.map(updatedPublicPackages, pkg => pkg.name);
const allLernaPackages = lernaGetPackages(MONOREPO_ROOT_PATH);
const relevantLernaPackages = _.filter(allLernaPackages, pkg => {
return _.includes(updatedPackageNames, pkg.package.name);
});
_.each(relevantLernaPackages, lernaPackage => {
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];
} 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;
}
// Save updated CHANGELOG.json
fs.writeFileSync(changelogJSONPath, JSON.stringify(changelogs, null, '\t'));
// Generate updated CHANGELOG.md
const changelogMd = generateChangelogMd(changelogs);
});
})().catch(err => {
utils.log(err);
process.exit(1);
});
async function getPublicLernaUpdatedPackagesAsync(): Promise<UpdatedPackage[]> {
const result = await execAsync(`./node_modules/lerna/bin/lerna.js updated --json`, { cwd: MONOREPO_ROOT_PATH });
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 {
return '';
}
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