RocketChat/Rocket.Chat

import fs from 'fs';
import path from 'path';

import * as core from '@actions/core';
import { exec } from '@actions/exec';
import * as github from '@actions/github';

import { setupOctokit } from './setupOctokit';
import { createTempReleaseNotes, getChangelogEntry, getEngineVersionsMd, isPreRelease, readPackageJson } from './utils';

export async function updatePRDescription({
    githubToken,
    mainPackagePath,
    cwd = process.cwd(),
}: {
    githubToken: string;
    mainPackagePath: string;
    cwd?: string;
}) {
    const octokit = setupOctokit(githubToken);

    // in case it is a pre release we exit to get the changelog of the final version
    if (isPreRelease(cwd)) {
        await exec('yarn', ['changeset', 'pre', 'exit']);
    }

    // generate change logs from changesets
    await exec('yarn', ['changeset', 'version']);

    // get version from main package
    const { version: newVersion } = await readPackageJson(mainPackagePath);

    const mainPackageChangelog = path.join(mainPackagePath, 'CHANGELOG.md');

    const changelogContents = fs.readFileSync(mainPackageChangelog, 'utf8');
    const changelogEntry = getChangelogEntry(changelogContents, newVersion);
    if (!changelogEntry) {
        // we can find a changelog but not the entry for this version
        // if this is true, something has probably gone wrong
        throw new Error('Could not find changelog entry for version newVersion');
    }

    core.info('get PR description');
    const result = await octokit.rest.pulls.get({
        pull_number: github.context.issue.number,
        ...github.context.repo,
    });

    const { body: originalBody = '' } = result.data;

    const cleanBody = originalBody?.replace(/<!-- release-notes-start -->.*<!-- release-notes-end -->/s, '').trim() || '';

    const releaseBody = (await getEngineVersionsMd(cwd)) + changelogEntry.content;

    const bodyUpdated = `${cleanBody}\n${createTempReleaseNotes(newVersion, releaseBody)}`;

    if (bodyUpdated === originalBody) {
        core.info('no changes to PR description');
        return;
    }

    core.info('update PR description');
    await octokit.rest.pulls.update({
        owner: github.context.repo.owner,
        repo: github.context.repo.repo,
        pull_number: github.context.issue.number,
        body: bodyUpdated,
    });
}