Add release notes generation and publishing workflow (#9255)

bin/generate_release_notes.py

@@ -0,0 +1,276 @@
+#!/usr/bin/env python3
+"""
+Generate release notes from merged PRs on develop and master branches.
+Categorizes PRs into Enhancements and Bug Fixes/Maintenance sections.
+"""
+
+import subprocess
+import re
+import json
+import sys
+from datetime import datetime
+
+
+def get_last_release_tag():
+    """Get the most recent release tag."""
+    result = subprocess.run(
+        ["git", "describe", "--tags", "--abbrev=0"],
+        capture_output=True,
+        text=True,
+        check=True,
+    )
+    return result.stdout.strip()
+
+
+def get_merged_prs_since_tag(tag, branch):
+    """Get all merged PRs since the given tag on the specified branch."""
+    # Get commits since tag on the branch - look for PR numbers in parentheses
+    result = subprocess.run(
+        [
+            "git",
+            "log",
+            f"{tag}..origin/{branch}",
+            "--oneline",
+        ],
+        capture_output=True,
+        text=True,
+    )
+
+    prs = []
+    seen_pr_numbers = set()
+
+    for line in result.stdout.strip().split("\n"):
+        if not line:
+            continue
+
+        # Extract PR number from commit message - format: "Title (#1234)"
+        pr_match = re.search(r"\(#(\d+)\)", line)
+        if pr_match:
+            pr_number = pr_match.group(1)
+            if pr_number not in seen_pr_numbers:
+                seen_pr_numbers.add(pr_number)
+                prs.append(pr_number)
+
+    return prs
+
+
+def get_pr_details(pr_number):
+    """Get PR details from GitHub API via gh CLI."""
+    try:
+        result = subprocess.run(
+            [
+                "gh",
+                "pr",
+                "view",
+                pr_number,
+                "--json",
+                "title,author,labels,url",
+            ],
+            capture_output=True,
+            text=True,
+            check=True,
+        )
+        return json.loads(result.stdout)
+    except subprocess.CalledProcessError:
+        return None
+
+
+def should_exclude_pr(pr_details):
+    """Check if PR should be excluded from release notes."""
+    if not pr_details:
+        return True
+
+    title = pr_details.get("title", "").lower()
+
+    # Exclude trunk update PRs
+    if "upgrade trunk" in title or "update trunk" in title or "trunk update" in title:
+        return True
+
+    # Exclude protobuf update PRs
+    if "update protobufs" in title or "update protobuf" in title:
+        return True
+
+    # Exclude automated version bump PRs
+    if "bump release version" in title or "bump version" in title:
+        return True
+
+    # Exclude automated dependency digest updates (chore(deps): update X digest to Y)
+    if re.match(r"^chore\(deps\):\s*update .+ digest to [a-f0-9]+$", title, re.IGNORECASE):
+        return True
+
+    # Exclude generic "Update X digest to Y" patterns
+    if re.match(r"^update .+ digest to [a-f0-9]+$", title, re.IGNORECASE):
+        return True
+
+    return False
+
+
+def is_enhancement(pr_details):
+    """Determine if PR is an enhancement based on labels and title."""
+    labels = [label.get("name", "").lower() for label in pr_details.get("labels", [])]
+
+    # Check labels first
+    enhancement_labels = ["enhancement", "feature", "feat", "new feature"]
+    for label in labels:
+        if any(enh in label for enh in enhancement_labels):
+            return True
+
+    # Check title prefixes
+    title = pr_details.get("title", "")
+    enhancement_prefixes = ["feat:", "feature:", "add:"]
+    title_lower = title.lower()
+    for prefix in enhancement_prefixes:
+        if title_lower.startswith(prefix) or f" {prefix}" in title_lower:
+            return True
+
+    return False
+
+
+def clean_title(title):
+    """Clean up PR title for release notes."""
+    # Remove common prefixes
+    prefixes_to_remove = [
+        r"^fix:\s*",
+        r"^feat:\s*",
+        r"^feature:\s*",
+        r"^bug:\s*",
+        r"^bugfix:\s*",
+        r"^chore:\s*",
+        r"^chore\([^)]+\):\s*",
+        r"^refactor:\s*",
+        r"^docs:\s*",
+        r"^ci:\s*",
+        r"^build:\s*",
+        r"^perf:\s*",
+        r"^style:\s*",
+        r"^test:\s*",
+    ]
+
+    cleaned = title
+    for prefix in prefixes_to_remove:
+        cleaned = re.sub(prefix, "", cleaned, flags=re.IGNORECASE)
+
+    # Ensure first letter is capitalized
+    if cleaned:
+        cleaned = cleaned[0].upper() + cleaned[1:]
+
+    return cleaned.strip()
+
+
+def format_pr_line(pr_details):
+    """Format a PR as a markdown bullet point."""
+    title = clean_title(pr_details.get("title", "Unknown"))
+    author = pr_details.get("author", {}).get("login", "unknown")
+    url = pr_details.get("url", "")
+
+    return f"- {title} by @{author} in {url}"
+
+
+def get_new_contributors(pr_details_list, tag):
+    """Find contributors who made their first contribution in this release."""
+    # Exclude bots from new contributors
+    bot_authors = {"github-actions", "renovate", "dependabot", "app/renovate", "app/github-actions", "app/dependabot"}
+
+    new_contributors = []
+    seen_authors = set()
+
+    for pr in pr_details_list:
+        author = pr.get("author", {}).get("login", "")
+        if not author or author in seen_authors:
+            continue
+
+        # Skip bots
+        if author.lower() in bot_authors or author.startswith("app/"):
+            continue
+
+        seen_authors.add(author)
+
+        # Check if this author appears in git history before tag
+        author_check = subprocess.run(
+            ["git", "log", f"{tag}", f"--author={author}", "--oneline", "-1"],
+            capture_output=True,
+            text=True,
+        )
+        if not author_check.stdout.strip():
+            new_contributors.append((author, pr.get("url", "")))
+
+    return new_contributors
+
+
+def main():
+    if len(sys.argv) < 2:
+        print("Usage: generate_release_notes.py <new_version>", file=sys.stderr)
+        sys.exit(1)
+
+    new_version = sys.argv[1]
+
+    # Get last release tag
+    try:
+        last_tag = get_last_release_tag()
+    except subprocess.CalledProcessError:
+        print("Error: Could not find last release tag", file=sys.stderr)
+        sys.exit(1)
+
+    # Collect PRs from both branches
+    all_pr_numbers = set()
+
+    for branch in ["develop", "master"]:
+        try:
+            prs = get_merged_prs_since_tag(last_tag, branch)
+            all_pr_numbers.update(prs)
+        except Exception as e:
+            print(f"Warning: Could not get PRs from {branch}: {e}", file=sys.stderr)
+
+    # Get details for all PRs
+    enhancements = []
+    bug_fixes = []
+    all_pr_details = []
+
+    for pr_number in sorted(all_pr_numbers, key=int):
+        details = get_pr_details(pr_number)
+        if details and not should_exclude_pr(details):
+            all_pr_details.append(details)
+            if is_enhancement(details):
+                enhancements.append(details)
+            else:
+                bug_fixes.append(details)
+
+    # Generate release notes
+    output = []
+
+    if enhancements:
+        output.append("## 🚀 Enhancements\n")
+        for pr in enhancements:
+            output.append(format_pr_line(pr))
+        output.append("")
+
+    if bug_fixes:
+        output.append("## 🐛 Bug fixes and maintenance\n")
+        for pr in bug_fixes:
+            output.append(format_pr_line(pr))
+        output.append("")
+
+    # Find new contributors
+    new_contributors = get_new_contributors(all_pr_details, last_tag)
+    if new_contributors:
+        output.append("## New Contributors\n")
+        for author, url in new_contributors:
+            # Find first PR URL for this contributor
+            first_pr_url = url
+            for pr in all_pr_details:
+                if pr.get("author", {}).get("login") == author:
+                    first_pr_url = pr.get("url", url)
+                    break
+            output.append(f"- @{author} made their first contribution in {first_pr_url}")
+        output.append("")
+
+    # Add full changelog link
+    output.append(
+        f"**Full Changelog**: https://github.com/meshtastic/firmware/compare/{last_tag}...v{new_version}"
+    )
+
+    print("\n".join(output))
+
+
+if __name__ == "__main__":
+    main()