Add generate_updates.js script

Author: AjinkyaM1

scripts/generate_updates.js

@@ -0,0 +1,123 @@
+const { Octokit } = require("@octokit/rest");
+const { GoogleGenerativeAI } = require("@google/generative-ai");
+const fs = require('fs');
+const path = require('path');
+
+const GITHUB_TOKEN = process.env.GITHUB_TOKEN;
+const GEMINI_API_KEY = process.env.GEMINI_API_KEY;
+const REPOSITORIES = process.env.REPOSITORIES || process.env.GITHUB_REPOSITORY;
+
+const octokit = new Octokit({ auth: GITHUB_TOKEN });
+const genAI = new GoogleGenerativeAI(GEMINI_API_KEY);
+
+async function getIssueDetails(owner, repo, issueNumber) {
+    try {
+        const { data: issue } = await octokit.request("GET /repos/{owner}/{repo}/issues/{issue_number}", {
+            owner,
+            repo,
+            issue_number: issueNumber
+        });
+        return `Issue Title: ${issue.title}\nIssue Description: ${issue.body ? issue.body.slice(0, 500) + "..." : "No description provided."}`;
+    } catch (e) {
+        console.warn(`Could not fetch issue #${issueNumber} for ${owner}/${repo}: ${e.message}`);
+        return null;
+    }
+}
+
+async function getMergedPRs(owner, repo) {
+    try {
+        const prs = await octokit.paginate("GET /repos/{owner}/{repo}/pulls", { owner, repo, state: 'closed', per_page: 50 });
+        const thirtyDaysAgo = new Date();
+        thirtyDaysAgo.setDate(thirtyDaysAgo.getDate() - 30);
+        const merged = prs.filter(pr => pr.merged_at && new Date(pr.merged_at) > thirtyDaysAgo);
+        
+        const results = [];
+        for (const pr of merged) {
+            let issueContext = "";
+            const issueMatch = pr.body && pr.body.match(/(?:fix|fixes|fixed|close|closes|closed|resolve|resolves|resolved)\s+#(\d+)/i);
+            if (issueMatch) {
+                const issueNumber = issueMatch[1];
+                const details = await getIssueDetails(owner, repo, issueNumber);
+                if (details) issueContext = details;
+            }
+            results.push({ repository: `${owner}/${repo}`, title: pr.title, context: issueContext });
+        }
+        return results;
+    } catch (e) { return []; }
+}
+
+async function generateWithRetry(modelName, prompt, attempt = 1) {
+    try {
+        const model = genAI.getGenerativeModel({ model: modelName });
+        const result = await model.generateContent(prompt);
+        return result.response.text();
+    } catch (e) {
+        if ((e.status === 503 || e.status === 429) && attempt < 3) {
+            console.log(`Model ${modelName} busy. Waiting 3s...`);
+            await new Promise(r => setTimeout(r, 3000));
+            return generateWithRetry(modelName, prompt, attempt + 1);
+        }
+        throw e;
+    }
+}
+
+async function main() {
+    try {
+        const repoList = REPOSITORIES.split(',').map(r => r.trim());
+        let allUpdates = [];
+        for (const repoStr of repoList) {
+            const [o, r] = repoStr.split('/');
+            const prs = await getMergedPRs(o, r);
+            allUpdates = allUpdates.concat(prs);
+        }
+
+        if (allUpdates.length === 0) return console.log("Nothing to report.");
+
+        let style = "Professional.";
+        // Prioritize .gemini/styleguide.md, fallback to root
+        if (fs.existsSync('.gemini/styleguide.md')) {
+            style = fs.readFileSync('.gemini/styleguide.md', 'utf8');
+        } else if (fs.existsSync('STYLE_GUIDE.md')) {
+            style = fs.readFileSync('STYLE_GUIDE.md', 'utf8');
+        }
+        
+        const prSummaries = allUpdates.map(p => {
+            let item = `- [${p.repository}] ${p.title}`;
+            if (p.context) item += `\n  Context (Linked Issue): ${p.context.replace(/\n/g, ' ')}`;
+            return item;
+        }).join("\n");
+
+        const instruction = `
+Role: You are a Product Marketing expert writing a customer-facing Product Update.
+Task: Transform raw technical pull request titles into a polished, user-friendly Product Update.
+
+Instructions:
+1. Categorize updates clearly (e.g., 🚀 New Features, ⚡ Improvements, 🐛 Bug Fixes).
+2. Explain each item in customer-friendly, non-technical language.
+3. Clearly state the User Benefit for every major update.
+4. Use the provided 'Context (Linked Issue)' to explain the "why" and customer value.
+5. STRICTLY follow the provided Style Guide (tone, formatting, structure).
+6. Do not invent features or details; keep vague PRs high-level.
+7. Write with a product marketing tone (value-led, confident, announcement-style — not technical).
+8. Exclude internal maintenance tasks (e.g., dependency updates, CI/CD changes) that have no visible impact on the user.
+
+Output: Scannable, customer-ready Product Update suitable for release notes or announcements.
+`;
+
+        const prompt = `${instruction}\n\nStyle Guide:\n${style}\n\nChanges:\n${prSummaries}`;
+
+        const models = ["gemini-3-flash-preview", "gemini-2.5-flash", "gemini-1.5-flash"];
+        let content = null;
+        for (const m of models) {
+            try { content = await generateWithRetry(m, prompt); break; }
+            catch (e) { console.log(`${m} failed, trying next...`); }
+        }
+
+        if (!content) throw new Error("AI servers are unavailable. Try again in 5 minutes.");
+        
+        if (!fs.existsSync('product-updates')) fs.mkdirSync('product-updates');
+        fs.writeFileSync(`product-updates/${new Date().getFullYear()}.md`, content);
+        console.log("SUCCESS!");
+    } catch (e) { console.error("FATAL:", e.message); process.exit(1); }
+}
+main();