chore(NODE-5387): add release automation

.github/actions/setup/action.yml

@@ -0,0 +1,15 @@
+name: Setup
+description: 'Installs node, driver dependencies, and builds source'
+
+runs:
+  using: composite
+  steps:
+    - uses: actions/setup-node@v3
+      with:
+        node-version: 'lts/*'
+        cache: 'npm'
+        registry-url: 'https://registry.npmjs.org'
+    - run: npm install -g npm@latest
+      shell: bash
+    - run: npm clean-install
+      shell: bash

.github/pull_request_template.md

@@ -16,6 +16,14 @@ If you haven't already, it would greatly help the team review this work in a tim
 You can do that here: https://jira.mongodb.org/projects/NODE
 -->
 
+### Release Highlight
+
+<!-- RELEASE_HIGHLIGHT_START -->
+
+### Fill in title or leave empty for no highlight
+
+<!-- RELEASE_HIGHLIGHT_END -->
+
 ### Double check the following
 
 - [ ] Ran `npm run check:lint` script

.github/scripts/highlights.mjs

@@ -0,0 +1,79 @@
+// @ts-check
+import * as process from 'node:process';
+import { Octokit } from '@octokit/core';
+import { output } from './util.mjs';
+
+const {
+  GITHUB_TOKEN = '',
+  PR_LIST = '',
+  owner = 'mongodb-js',
+  repo = 'nodejs-mongodb-legacy'
+} = process.env;
+if (GITHUB_TOKEN === '') throw new Error('GITHUB_TOKEN cannot be empty');
+
+const octokit = new Octokit({
+  auth: GITHUB_TOKEN,
+  log: {
+    debug: msg => console.error('Octokit.debug', msg),
+    info: msg => console.error('Octokit.info', msg),
+    warn: msg => console.error('Octokit.warn', msg),
+    error: msg => console.error('Octokit.error', msg)
+  }
+});
+
+const prs = PR_LIST.split(',').map(pr => {
+  const prNum = Number(pr);
+  if (Number.isNaN(prNum))
+    throw Error(`expected PR number list: ${PR_LIST}, offending entry: ${pr}`);
+  return prNum;
+});
+
+/** @param {number} pull_number */
+async function getPullRequestContent(pull_number) {
+  const startIndicator = 'RELEASE_HIGHLIGHT_START -->';
+  const endIndicator = '<!-- RELEASE_HIGHLIGHT_END';
+
+  let body;
+  try {
+    const res = await octokit.request('GET /repos/{owner}/{repo}/pulls/{pull_number}', {
+      owner,
+      repo,
+      pull_number,
+      headers: { 'X-GitHub-Api-Version': '2022-11-28' }
+    });
+    body = res.data.body;
+  } catch (error) {
+    console.log(`Could not get PR ${pull_number}, skipping. ${error.status}`);
+    return '';
+  }
+
+  if (body == null || !(body.includes(startIndicator) && body.includes(endIndicator))) {
+    console.log(`PR #${pull_number} has no highlight`);
+    return '';
+  }
+
+  const start = body.indexOf('### ', body.indexOf(startIndicator));
+  const end = body.indexOf(endIndicator);
+  const highlightSection = body.slice(start, end).trim();
+
+  console.log(`PR #${pull_number} has a highlight ${highlightSection.length} characters long`);
+  return highlightSection;
+}
+
+/** @param {number[]} prs */
+async function pullRequestHighlights(prs) {
+  const highlights = [];
+  for (const pr of prs) {
+    const content = await getPullRequestContent(pr);
+    highlights.push(content);
+  }
+  if (!highlights.length) return '';
+
+  highlights.unshift('## Release Notes\n\n');
+  return highlights.join('\n\n');
+}
+
+console.log('List of PRs to collect highlights from:', prs);
+const highlights = await pullRequestHighlights(prs);
+
+await output('highlights', JSON.stringify({ highlights }));

.github/scripts/pr_list.mjs

@@ -0,0 +1,28 @@
+// @ts-check
+import * as url from 'node:url';
+import * as fs from 'node:fs/promises';
+import * as path from 'node:path';
+import { getCurrentHistorySection, output } from './util.mjs';
+
+const __dirname = url.fileURLToPath(new URL('.', import.meta.url));
+const historyFilePath = path.join(__dirname, '..', '..', 'HISTORY.md');
+
+/**
+ * @param {string} history
+ * @returns {string[]}
+ */
+function parsePRList(history) {
+  const prRegexp = /mongodb-legacy/issues\/(?<prNum>\d+)\)/iu;
+  return history
+    .split('\n')
+    .map(line => prRegexp.exec(line)?.groups?.prNum ?? '')
+    .filter(prNum => prNum !== '');
+}
+
+const historyContents = await fs.readFile(historyFilePath, { encoding: 'utf8' });
+
+const currentHistorySection = getCurrentHistorySection(historyContents);
+
+const prs = parsePRList(currentHistorySection);
+
+await output('pr_list', prs.join(','));

.github/scripts/release_notes.mjs

@@ -0,0 +1,56 @@
+//@ts-check
+import * as url from 'node:url';
+import * as fs from 'node:fs/promises';
+import * as path from 'node:path';
+import * as process from 'node:process';
+import * as semver from 'semver';
+import { getCurrentHistorySection, output } from './util.mjs';
+
+const { HIGHLIGHTS = '' } = process.env;
+if (HIGHLIGHTS === '') throw new Error('HIGHLIGHTS cannot be empty');
+
+const { highlights } = JSON.parse(HIGHLIGHTS);
+
+const __dirname = url.fileURLToPath(new URL('.', import.meta.url));
+const historyFilePath = path.join(__dirname, '..', '..', 'HISTORY.md');
+const packageFilePath = path.join(__dirname, '..', '..', 'package.json');
+
+const historyContents = await fs.readFile(historyFilePath, { encoding: 'utf8' });
+
+const currentHistorySection = getCurrentHistorySection(historyContents);
+
+const version = semver.parse(
+  JSON.parse(await fs.readFile(packageFilePath, { encoding: 'utf8' })).version
+);
+if (version == null) throw new Error(`could not create semver from package.json`);
+
+console.log('\n\n--- history entry ---\n\n', currentHistorySection);
+
+const currentHistorySectionLines = currentHistorySection.split('\n');
+const header = currentHistorySectionLines[0];
+const history = currentHistorySectionLines.slice(1).join('\n').trim();
+
+const releaseNotes = `${header}
+
+The MongoDB Node.js team is pleased to announce version ${version.version} of the \`mongodb-legacy\` package!
+
+${highlights}
+${history}
+## Documentation
+
+* [Reference](https://docs.mongodb.com/drivers/node/current/)
+* [API](https://mongodb.github.io/node-mongodb-native/${version.major}.${version.minor}/)
+* [Changelog](https://github.com/mongodb/node-mongodb-native/blob/v${version.version}/HISTORY.md)
+
+We invite you to try the \`mongodb-legacy\` library immediately, and report any issues to the [NODE project](https://jira.mongodb.org/projects/NODE).
+`;
+
+const releaseNotesPath = path.join(process.cwd(), 'release_notes.md');
+
+await fs.writeFile(
+  releaseNotesPath,
+  `:seedling: A new release!\n---\n${releaseNotes}\n---\n`,
+  { encoding:'utf8' }
+);
+
+await output('release_notes_path', releaseNotesPath)

.github/scripts/util.mjs

@@ -0,0 +1,47 @@
+// @ts-check
+import * as process from 'node:process';
+import * as fs from 'node:fs/promises';
+
+export async function output(key, value) {
+  const { GITHUB_OUTPUT = '' } = process.env;
+  const output = `${key}=${value}\n`;
+  console.log('outputting:', output);
+
+  if (GITHUB_OUTPUT.length === 0) {
+    // This is always defined in Github actions, and if it is not for some reason, tasks that follow will fail.
+    // For local testing it's convenient to see what scripts would output without requiring the variable to be defined.
+    console.log('GITHUB_OUTPUT not defined, printing only');
+    return;
+  }
+
+  const outputFile = await fs.open(GITHUB_OUTPUT, 'a');
+  await outputFile.appendFile(output, { encoding: 'utf8' });
+  await outputFile.close();
+}
+
+/**
+ * @param {string} historyContents
+ * @returns {string}
+ */
+export function getCurrentHistorySection(historyContents) {
+  /** Markdown version header */
+  const VERSION_HEADER = /^#.+\(\d{4}-\d{2}-\d{2}\)$/g;
+
+  const historyLines = historyContents.split('\n');
+
+  // Search for the line with the first version header, this will be the one we're releasing
+  const headerLineIndex = historyLines.findIndex(line => VERSION_HEADER.test(line));
+  if (headerLineIndex < 0) throw new Error('Could not find any version header');
+
+  console.log('Found markdown header current release', headerLineIndex, ':', historyLines[headerLineIndex]);
+
+  // Search lines starting after the first header, and add back the offset we sliced at
+  const nextHeaderLineIndex = historyLines
+    .slice(headerLineIndex + 1)
+    .findIndex(line => VERSION_HEADER.test(line)) + headerLineIndex + 1;
+  if (nextHeaderLineIndex < 0) throw new Error(`Could not find previous version header, searched ${headerLineIndex + 1}`);
+
+  console.log('Found markdown header previous release', nextHeaderLineIndex, ':', historyLines[nextHeaderLineIndex]);
+
+  return historyLines.slice(headerLineIndex, nextHeaderLineIndex).join('\n');
+}

.github/workflows/lint.yml

@@ -11,9 +11,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - name: Use Node.js LTS
-        uses: actions/setup-node@v3
-        with:
-          node-version: lts/*
-      - run: npm clean-install
+
+      - name: actions/setup
+        uses: ./.github/actions/setup
+
       - run: npm run check:lint

.github/workflows/release.yml

@@ -0,0 +1,37 @@
+on:
+  push:
+    branches: [main]
+  workflow_dispatch: {}
+
+permissions:
+  contents: write
+  pull-requests: write
+
+name: release
+
+jobs:
+  release-please:
+    runs-on: ubuntu-latest
+    steps:
+      - id: release
+        uses: google-github-actions/release-please-action@v3
+        with:
+          release-type: node
+          package-name: mongodb-legacy
+          # Example: chore(main): release 5.7.0 [skip-ci]
+          # ${scope} - parenthesis included, base branch name
+          pull-request-title-pattern: 'chore${scope}: release ${version} [skip-ci]'
+          pull-request-header: 'Please run the release_notes action before releasing to generate release highlights'
+          changelog-path: HISTORY.md
+          default-branch: main
+
+      # If release-please created a release, publish to npm
+      - if: ${{ steps.release.outputs.release_created }}
+        uses: actions/checkout@v3
+      - if: ${{ steps.release.outputs.release_created }}
+        name: actions/setup
+        uses: ./.github/actions/setup
+      - if: ${{ steps.release.outputs.release_created }}
+        run: npm publish --provenance
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

.github/workflows/release_notes.yml

@@ -0,0 +1,48 @@
+name: release_notes
+
+on:
+  workflow_dispatch:
+    inputs:
+      releasePr:
+        description: 'Enter release PR number'
+        required: true
+        type: number
+
+jobs:
+  release_notes:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: actions/setup
+        uses: ./.github/actions/setup
+
+      # See: https://github.com/googleapis/release-please/issues/1274
+
+      # Get the PRs that are in this release
+      # Outputs a list of comma seperated PR numbers, parsed from HISTORY.md
+      - id: pr_list
+        run: node .github/scripts/pr_list.mjs
+        env:
+          GITHUB_TOKEN: ${{ github.token }}
+
+      # From the list of PRs, gather the highlight sections of the PR body
+      # output JSON with "highlights" key (to preserve newlines)
+      - id: highlights
+        run: node .github/scripts/highlights.mjs
+        env:
+          GITHUB_TOKEN: ${{ github.token }}
+          PR_LIST: ${{ steps.pr_list.outputs.pr_list }}
+
+      # The combined output is available
+      - id: release_notes
+        run: node .github/scripts/release_notes.mjs
+        env:
+          GITHUB_TOKEN: ${{ github.token }}
+          HIGHLIGHTS: ${{ steps.highlights.outputs.highlights }}
+
+      # Update the release PR body
+      - run: gh pr edit ${{ inputs.releasePr }} --body-file ${{ steps.release_notes.outputs.release_notes_path }}
+        shell: bash
+        env:
+          GITHUB_TOKEN: ${{ github.token }}