create a PR release notes generator

Author: ethanshar

scripts/prRelesaeNotes.js

@@ -0,0 +1,124 @@
+const fs = require('fs');
+const _ = require('lodash');
+const childProcess = require('child_process');
+const fetch = require('node-fetch');
+
+const GITHUB_TOKEN = 'bbb2a40e413ca175fc2a91f2aec8e46586da5279';
+const LATEST_VERSION = '5.14.0';
+const NEW_VERSION = '5.15.0';
+
+let releaseNotes;
+
+run();
+
+async function run() {
+  const latestReleaseDate = await fetchLatestReleaseDate(LATEST_VERSION);
+  const PRs = await fetchMergedPRs(latestReleaseDate);
+  generateNotes(PRs);
+}
+
+async function fetchLatestReleaseDate(version) {
+  const relesae = childProcess.execSync(`gh release view ${version}`).toString();
+  const releaseMetaData = relesae.split('--')[0];
+  const createDate = _.chain(releaseMetaData)
+    .split('\n')
+    .find(l => l.startsWith('created'))
+    .split('\t')
+    .last()
+    .value();
+
+  return new Date(createDate);
+}
+
+async function fetchMergedPRs(postMergedDate) {
+  const page = 1;
+  // process.stderr.write(`Loading page ${page}..`);
+  const url =
+    'https://api.github.com/repos/wix/react-native-ui-lib/pulls?' +
+    `state=closed&base=master&page=${page}&per_page=100`;
+  const headers = {Authorization: `token ${GITHUB_TOKEN}`};
+  const response = await fetch(url, {headers});
+  const PRs = await response.json();
+
+  const relevantPRs = _.chain(PRs)
+    .filter(pr => !!pr.merged_at && new Date(pr.merged_at) > postMergedDate)
+    .sortBy('merged_at')
+    .map(pr => ({
+      state: pr.state,
+      merged_at: pr.merged_at,
+      html_url: pr.html_url,
+      branch: pr.head.ref,
+      number: pr.number,
+      title: pr.title,
+      info: parsePR(pr.body)
+    }))
+    .value();
+
+  return relevantPRs;
+}
+
+function parsePR(prContent) {
+  const sections = prContent.split('##');
+
+  const PRInfo = {};
+  sections.forEach(section => {
+    const lines = section.trim().split('\r\n');
+    const title = lines.splice(0, 1)[0].toLowerCase();
+    const body = lines.join('\r\n');
+    if (title && body) {
+      PRInfo[title] = body;
+    }
+  });
+
+  return PRInfo;
+}
+
+function generateNotes(PRs) {
+  const features = [],
+    fixes = [],
+    infra = [],
+    others = [];
+
+  PRs.forEach(pr => {
+    if (pr.branch.startsWith('feat/')) {
+      fixes.push(pr);
+    } else if (pr.branch.startsWith('fix/')) {
+      features.push(pr);
+    } else if (pr.branch.startsWith('infra/')) {
+      infra.push(pr);
+    } else {
+      others.push(pr);
+    }
+  });
+
+  // features
+  addTitle(':gift: Features');
+  features.forEach(addEntry);
+  // bug fixes
+  addTitle(':wrench: Fixes');
+  fixes.forEach(addEntry);
+  // migrations
+  addTitle(':bulb: Deprecations & Migrations');
+  infra.forEach(addEntry);
+  // Maintenance & Infra
+  addTitle(':gear: Maintenance & Infra');
+  // others
+  addTitle('OTHERS');
+  others.forEach(addEntry);
+
+  fs.writeFileSync(`${process.env.HOME}/Downloads/uilib-release-notes_${NEW_VERSION}.txt`, releaseNotes, {
+    encoding: 'utf8'
+  });
+
+  console.log(
+    `\x1b[1m\x1b[32m✔\x1b[0m \x1b[32muilib-release-notes.txt was successfully written to ${process.env.HOME}/Downloads\x1b[0m \x1b[1m\x1b[32m✔\x1b[0m`
+  );
+}
+
+function addTitle(title) {
+  releaseNotes += `\n\n${title}\n\n`;
+}
+
+function addEntry(pr) {
+  releaseNotes += `• ${pr.info.changelog || pr.title} (${pr.info['jira issue']}) (#${pr.number}) \n`;
+}