Add drafter automation

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# Release Workflow
This document describes the branch strategy, CI/CD pipelines, and release process for Booklore.
## Branch Strategy
```
master Stable releases only. Tagged with vX.Y.Z
release/X.Y Release stabilization. RC builds published here
develop Active development. All feature PRs merge here
```
| Branch | Purpose | Stability |
|--------|---------|-----------|
| `master` | Production releases | Stable |
| `release/X.Y` | Release candidates, bug fixes | Stabilizing |
| `develop` | New features, active development | Unstable |
## CI/CD Pipelines
### 1. Develop Pipeline (`develop-pipeline.yml`)
**Triggers:**
- Push to `develop`
- PRs targeting `develop`, `release/**`, or `master`
**Actions:**
- Flyway migration check
- Backend tests (Gradle)
- Frontend tests (Angular/Vitest)
- Docker build and push (for pushes and internal PRs)
**Image Tags:** `develop-{sha}`, `pr-{number}-{sha}`
---
### 2. Release Pipeline (`release-pipeline.yml`)
**Triggers:**
- Push to `release/**` branches
- PRs targeting `release/**` branches
**Actions:**
- Flyway migration check (against `master`)
- Backend and frontend tests
- Docker build and push with RC tags
**Image Tags:** `v1.18.0-rc.1`, `v1.18.0-rc.2`, `release-1.18-{sha}`
**Validations:**
- Branch name must be `release/X.Y` or `release/X.Y.Z`
- Version must be newer than latest tag
- Rejects suspicious version jumps (typo protection)
---
### 3. Master Tag Pipeline (`master-pipeline.yml`)
**Triggers:**
- Push of tags matching `v*`
**Actions:**
- Tag format validation
- Flyway migration check
- Backend and frontend tests
- Docker build and push
- GitHub Release publication (publishes the draft release)
**Image Tags:** `v1.18.0`, `latest` (stable releases only)
**Validations:**
- Tag must be valid semver (`vX.Y.Z` or `vX.Y.Z-prerelease.N`)
- Version must be newer than latest stable tag
- Rejects suspicious version jumps (typo protection)
- Blocks prereleases if stable version already exists
---
### 4. Draft Release Pipeline (`draft-release.yml`)
**Triggers:**
- Push to `master`
**Actions:**
- Updates draft GitHub Release with changelog from merged PRs
- Categorizes changes based on PR labels (feature, bug, enhancement, etc.)
- Auto-resolves next version based on labels (major/minor/patch)
**Configuration:** `.github/release-drafter.yml`
**How it works:**
1. Each PR merged to `master` triggers this workflow
2. Release-drafter accumulates changes into a draft release
3. When you push a `v*` tag, the master-pipeline publishes the draft
**Label → Version mapping:**
| Label | Version Bump |
|-------|--------------|
| `major` | X.0.0 |
| `minor` | 0.X.0 |
| `patch` | 0.0.X |
**Label → Changelog category:**
| Labels | Category |
|--------|----------|
| `feature` | New Features |
| `enhancement` | Enhancements |
| `bug`, `fix` | Bug Fixes |
| `refactor`, `cleanup`, `chore` | Refactoring & Maintenance |
| `dependencies`, `deps` | Dependencies |
| `ci`, `cd`, `workflow` | CI/CD |
| `docs`, `documentation` | Documentation |
PRs with the `skip changelog` label are excluded from release notes.
---
## Release Flow Diagram
```
v1.17.0 (current)
develop ────●────●────●────●─────────────────●──▶ (continues)
│ ↑
│ (1) cut branch │ (5) merge back
▼ │
release/1.18 ──●──●──●────────────────┼──▶ (delete)
│ │ │ │
▼ ▼ ▼ │
rc.1 rc.2 rc.3 │
master ──────────────────────────────────────●──▶
(4) tag v1.18.0
Docker: v1.18.0 + latest
GitHub Release created
```
## Step-by-Step Release Process
### Phase 1: Cut Release Branch
When `develop` is feature-complete for the release:
```bash
git checkout develop && git pull
git checkout -b release/1.18
git push -u origin release/1.18
```
**What happens:**
- Release pipeline runs tests
- Publishes `v1.18.0-rc.1` to Docker Hub and GHCR
- RC number increments with each subsequent push
---
### Phase 2: Stabilize (Optional)
If bugs are found during RC testing, fix them on the release branch:
```bash
git checkout release/1.18
git checkout -b fix/critical-bug
# ... make fixes ...
git commit -m "Fix critical bug in authentication"
git push -u origin fix/critical-bug
# Create PR targeting the release branch
gh pr create --base release/1.18 --title "Fix critical bug"
gh pr merge --squash
```
**What happens:**
- Each merge to `release/1.18` publishes a new RC (`v1.18.0-rc.2`, `rc.3`, etc.)
- Testers can pull specific RC versions to validate fixes
---
### Phase 3: Merge to Master
When the RC is validated and stable:
```bash
# Create PR from release branch to master
gh pr create --base master --head release/1.18 --title "Release v1.18.0"
# After approval, merge (use merge commit, not squash)
gh pr merge --merge
```
**What happens:**
- Develop pipeline runs tests on the PR
- Merge commit lands on `master`
- No release is published yet (waiting for tag)
---
### Phase 4: Tag and Release
Create the release tag to trigger the final release:
```bash
git checkout master && git pull
git tag v1.18.0
git push origin v1.18.0
```
**What happens:**
- Master Tag pipeline validates the tag
- Runs full test suite
- Builds and pushes Docker images: `v1.18.0` + `latest`
- Publishes the draft GitHub Release (created by `draft-release.yml`) with changelog
---
### Phase 5: Post-Release Cleanup
Sync the release back to `develop` and clean up:
```bash
# Merge master back to develop (includes any RC fixes)
git checkout develop && git pull
git merge master
git push origin develop
# Delete the release branch
git push origin --delete release/1.18
git branch -d release/1.18
```
---
## Quick Reference Commands
### New Minor Release (v1.17.0 → v1.18.0)
```bash
# Cut release
git checkout develop && git pull
git checkout -b release/1.18
git push -u origin release/1.18
# When stable, merge to master
gh pr create --base master --head release/1.18 --title "Release v1.18.0"
gh pr merge --merge
# Tag release
git checkout master && git pull
git tag v1.18.0
git push origin v1.18.0
# Cleanup
git checkout develop && git pull && git merge master && git push
git push origin --delete release/1.18
git branch -d release/1.18
```
### New Patch Release (v1.18.0 → v1.18.1)
```bash
# Cut release from master (or existing release branch)
git checkout master && git pull
git checkout -b release/1.18
git push -u origin release/1.18
# Cherry-pick or fix bugs, then merge and tag
gh pr create --base master --head release/1.18 --title "Release v1.18.1"
gh pr merge --merge
git checkout master && git pull
git tag v1.18.1
git push origin v1.18.1
# Cleanup
git checkout develop && git pull && git merge master && git push
git push origin --delete release/1.18
```
### Hotfix (urgent production fix)
```bash
# Create hotfix branch from master
git checkout master && git pull
git checkout -b hotfix/1.18.1
# ... make urgent fix ...
git commit -m "Fix critical security issue"
git push -u origin hotfix/1.18.1
# Merge to master and tag
gh pr create --base master --head hotfix/1.18.1 --title "Hotfix v1.18.1"
gh pr merge --merge
git checkout master && git pull
git tag v1.18.1
git push origin v1.18.1
# Merge fix to develop
git checkout develop && git pull && git merge master && git push
git push origin --delete hotfix/1.18.1
```
---
## Version Validation Rules
The pipelines enforce these rules to prevent mistakes:
| Rule | Example | Result |
|------|---------|--------|
| No backwards versions | `v1.17.0` after `v1.18.0` | Blocked |
| No duplicate stable versions | `v1.18.0` after `v1.18.0` | Blocked |
| No prerelease after stable | `v1.18.0-rc.1` after `v1.18.0` | Blocked |
| Major jump ≤ 1 | `v3.0.0` after `v1.18.0` | Blocked |
| Minor jump ≤ 5 | `v1.25.0` after `v1.18.0` | Blocked |
| Patch jump ≤ 10 | `v1.18.15` after `v1.18.0` | Blocked |
These rules catch typos like `release/1.118` instead of `release/1.18`.
---
## Docker Image Tags
| Event | Tags Published |
|-------|---------------|
| Push to `develop` | `develop-abc1234` |
| PR #42 | `pr-42-abc1234` |
| Push to `release/1.18` | `v1.18.0-rc.1`, `release-1.18-abc1234` |
| Tag `v1.18.0` | `v1.18.0`, `latest` |
| Tag `v1.18.1-rc.1` | `v1.18.1-rc.1` (no `latest`) |
---
## FAQ
**Q: Can I have multiple release branches simultaneously?**
A: Yes. `release/1.18` and `release/1.19` can coexist. Each gets independent RC numbers.
**Q: What if I need to release a patch for an older version?**
A: Create `release/1.17` from the `v1.17.0` tag, make fixes, and tag `v1.17.1`.
**Q: Why use merge commits instead of squash for release PRs?**
A: Merge commits preserve the full history of RC fixes, making it easier to track what changed.
**Q: Can I skip the RC phase for urgent fixes?**
A: Yes. For hotfixes, you can merge directly to master and tag. The release pipeline is optional.
**Q: What happens if I push a tag that fails validation?**
A: The pipeline fails before publishing anything. Delete the tag (`git push --delete origin v1.18.0`), fix the issue, and re-tag.
**Q: How do I preview release notes before publishing?**
A: Go to GitHub Releases. The draft release is automatically updated as PRs merge to `master`. Review and edit the draft before tagging.
**Q: Why don't I see changes in the draft release?**
A: Ensure PRs have appropriate labels (`feature`, `bug`, `enhancement`, etc.). PRs without recognized labels still appear but won't be categorized. PRs with `skip changelog` label are excluded.

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name: Draft Release
on:
push:
branches:
- master
jobs:
draft-release:
name: Update Draft Release
runs-on: ubuntu-latest
permissions:
contents: write
pull-requests: read
steps:
- name: Draft Release Notes
uses: release-drafter/release-drafter@v6
env:
GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}