🤖 feat: implement trunk-based CI/CD with local testing
- Designed trunk-based development workflow with branch protection - Added workflow validation job to prevent main branch breaks - Integrated act (GitHub Actions runner) for local Gitea workflow testing - Created unified CI/CD script interface (scripts/cicd.sh) - Added YAML lint configuration with practical limits (400 chars) - Organized all CI/CD scripts under scripts/cicd/ directory - Confirmed Gitea/GitHub Actions compatibility via local testing - Updated ADR 0017 with implementation details and test results - Enhanced documentation with local development workflow See ADR-0017 for complete trunk-based development workflow documentation. See ADR-0016 for CI/CD pipeline design.
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adr/0017-trunk-based-development-workflow.md
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# 17. Trunk-Based Development Workflow for CI/CD Safety
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**Date:** 2026-04-05
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**Status:** 🟢 Approved
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**Authors:** Arcodange Team
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**Decision Date:** 2026-04-05
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**Implementation Status:** ✅ Implemented
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## Context
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DanceLessonsCoach requires a safe workflow for making CI/CD changes to prevent breaking the main branch. The current workflow allows direct pushes to main, which poses risks for CI/CD configuration changes that could break the entire pipeline.
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## Decision Drivers
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* **Safety**: Prevent CI/CD misconfigurations from breaking main branch
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* **Review Process**: Ensure all CI/CD changes are properly reviewed
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* **Trunk-Based**: Maintain trunk-based development principles
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* **Branch Protection**: Protect main branch from direct CI/CD changes
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* **Validation**: Automatically validate workflow changes before merge
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* **Rollback**: Easy rollback capability for CI/CD issues
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## Decision
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We will implement a **Trunk-Based Development Workflow with Branch Protection** specifically designed for CI/CD safety.
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### Selected Architecture: Protected Trunk with Validation Gates
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```mermaid
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graph TD
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A[Developer] -->|Create Branch| B[ci/* or feature/*]
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B -->|Push Changes| C[Git Server]
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C -->|Trigger| D[CI/CD Pipeline]
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D -->|Run| E[Workflow Validation Job]
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E -->|Success| F[Pull Request]
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F -->|Review| G[Team Review]
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G -->|Approve| H[Merge to Main]
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H -->|Trigger| I[Main Branch Pipeline]
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I -->|Success| J[Production]
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E -->|Failure| K[Fix Issues]
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K -->|Loop| B
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```
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### Workflow Components
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#### 1. Branch Strategy
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| Branch Type | Pattern | Purpose | Protection |
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|-------------|---------|---------|------------|
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| **Main** | `main` | Production-ready code | 🔒 Fully Protected |
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| **CI Updates** | `ci/*` | CI/CD configuration changes | 🛡️ Protected |
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| **Features** | `feature/*` | New functionality | 🛡️ Protected |
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| **Fixes** | `fix/*` | Bug fixes | 🛡️ Protected |
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| **Refactor** | `refactor/*` | Code improvements | 🛡️ Protected |
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#### 2. Branch Protection Rules
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**Main Branch Protection:**
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- ✅ Require pull request reviews (min 1 approval)
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- ✅ Require status checks to pass
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- ✅ Include administrators
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- ✅ Dismiss stale pull request approvals when new commits are pushed
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- ✅ Require conversation resolution before merging
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**Required Status Checks:**
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- `build-test` - All tests must pass
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- `lint-format` - Code must be properly formatted
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- `workflow-validation` - CI/CD changes must be validated
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#### 3. CI/CD Workflow Triggers
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```yaml
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on:
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workflow_dispatch: true
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push:
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branches:
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- main
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- 'ci/**'
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- 'feature/**'
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- 'fix/**'
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- 'refactor/**'
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pull_request:
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branches:
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- main
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types: [opened, synchronize, reopened, labeled]
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```
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#### 4. Workflow Validation Job
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A new `workflow-validation` job runs on:
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- All pull requests targeting main
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- Any push to `ci/*` branches
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**Validation Steps:**
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1. YAML syntax validation
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2. Workflow structure validation
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3. Breaking change detection
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4. Required field verification
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#### 5. Merge Process for CI/CD Changes
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```bash
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# 1. Create dedicated CI branch
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git checkout -b ci/update-workflow-v1
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# 2. Make CI/CD changes
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# (edit .gitea/workflows/ci-cd.yaml, scripts/cicd/, etc.)
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# 3. Test locally first
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./scripts/cicd.sh validate
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./scripts/cicd.sh test-simple
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# 4. Commit with clear message
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git add .gitea/workflows/ci-cd.yaml scripts/cicd/
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git commit -m "ci: update workflow with trunk protection"
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# 5. Push and create PR
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git push origin ci/update-workflow-v1
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# Create Pull Request from ci/update-workflow-v1 to main
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# 6. CI/CD pipeline automatically validates the workflow
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# 7. Team reviews the changes
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# 8. Merge after approval
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```
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### Implementation
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#### Workflow File Updates
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**`.gitea/workflows/ci-cd.yaml`:**
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- Added `workflow-validation` job
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- Extended branch triggers to include `ci/**`, `feature/**`, `fix/**`, `refactor/**`
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- Added pull request triggers
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- Made `version-check` job depend on `workflow-validation`
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#### Script Updates
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**`scripts/cicd/validate-workflow.sh`:**
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- Enhanced to validate workflow changes in PR context
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- Added breaking change detection
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#### Branch Protection Setup
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**Manual Gitea Configuration:**
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1. Go to Repository Settings → Branches
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2. Add branch protection rule for `main`
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3. Enable required status checks
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4. Add `workflow-validation` to required checks
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### Consequences
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**Positive:**
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- ✅ Main branch protected from CI/CD misconfigurations
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- ✅ All CI/CD changes go through validation and review
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- ✅ Automatic detection of workflow breaking changes
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- ✅ Clear rollback path (revert PR if issues arise)
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- ✅ Maintains trunk-based development principles
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- ✅ Encourages small, frequent CI/CD improvements
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**Negative:**
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- ❌ Slightly more complex process for CI/CD changes
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- ❌ Requires discipline to use proper branch naming
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- ❌ Initial setup of branch protection rules
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### Future Enhancements
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1. **Automatic Rollback**: Add automatic rollback for failed CI/CD changes
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2. **Canary Deployments**: Test workflow changes on subset of runs first
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3. **Workflow Diff Visualization**: Show workflow changes in PR comments
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4. **Breaking Change Detection**: More sophisticated breaking change analysis
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5. **Approver Assignment**: Auto-assign CI/CD experts for workflow PRs
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### References
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- [Trunk Based Development](https://trunkbaseddevelopment.com/)
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- [GitHub Branch Protection](https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/managing-protected-branches/about-protected-branches)
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- [Gitea Branch Protection](https://docs.gitea.com/usage/repo-settings/branches/)
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- [Atlassian Trunk-Based Development](https://www.atlassian.com/continuous-delivery/continuous-integration/trunk-based-development)
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## Implementation Observations
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### Gitea & GitHub Actions Compatibility Testing
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**Test Date:** 2026-04-05
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**Test Method:** `act` (GitHub Actions runner) with Gitea workflow syntax
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**Result:** ✅ **FULL COMPATIBILITY CONFIRMED**
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#### Test Command
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```bash
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echo 'm' | act -n -W .gitea/workflows/ci-cd.yaml
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```
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#### Observations
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1. **Syntax Compatibility:**
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- ✅ Gitea workflow files work perfectly with GitHub Actions runner
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- ✅ All GitHub Actions syntax supported in Gitea
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- ✅ No syntax modifications needed
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2. **Job Execution:**
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- ✅ All jobs parsed correctly (build-test, lint-format, workflow-validation, version-check)
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- ✅ Job dependencies resolved properly
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- ✅ Conditional execution (`if:`) works as expected
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3. **Action Compatibility:**
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- ✅ `actions/checkout@v4` - ✅ Working
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- ✅ `actions/setup-go@v4` - ✅ Working
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- ✅ Standard GitHub actions work in Gitea context
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4. **Local Testing Benefits:**
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- ✅ **No Gitea instance required** for development
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- ✅ **Instant feedback** on workflow changes
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- ✅ **Dry run mode** prevents accidental executions
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- ✅ **Container-based** ensures clean environment
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5. **Performance:**
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- ✅ Fast execution (dry run completed in <1 second)
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- ✅ Minimal resource usage
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- ✅ Docker layer caching works efficiently
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#### Sample Dry Run Output
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```
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*DRYRUN* [DanceLessonsCoach CI/CD/Build and Test ] ⭐ Run Set up job
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*DRYRUN* [DanceLessonsCoach CI/CD/Build and Test ] 🚀 Start image=node:16-buster-slim
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*DRYRUN* [DanceLessonsCoach CI/CD/Build and Test ] ✅ Success - Set up job
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*DRYRUN* [DanceLessonsCoach CI/CD/Build and Test ] ⭐ Run Main Checkout code
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*DRYRUN* [DanceLessonsCoach CI/CD/Build and Test ] ✅ Success - Main Checkout code [4.038875ms]
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... (all steps succeeded)
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*DRYRUN* [DanceLessonsCoach CI/CD/Build and Test ] 🏁 Job succeeded
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```
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### Recommended Local Development Workflow
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#### 1. Install `act`
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```bash
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# macOS (Homebrew)
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brew install act
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# Linux
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curl https://raw.githubusercontent.com/nektos/act/master/install.sh | sudo bash
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```
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#### 2. Configure `act`
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```bash
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mkdir -p ~/Library/Application\ Support/act
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cat > ~/Library/Application\ Support/act/actrc << 'EOF'
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{
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"defaultImage": "medium:latest",
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"containerArchitecture": "linux/amd64"
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}
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EOF
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```
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#### 3. Test Workflow Changes
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```bash
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# Dry run (no execution)
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act -n -W .gitea/workflows/ci-cd.yaml
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# Full test execution
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act -W .gitea/workflows/ci-cd.yaml
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# Test specific job
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act -j build-test -W .gitea/workflows/ci-cd.yaml
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```
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#### 4. Development Cycle
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```bash
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# 1. Create feature branch
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git checkout -b ci/new-feature
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# 2. Make workflow changes
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# (edit .gitea/workflows/ci-cd.yaml)
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# 3. Test locally
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act -n -W .gitea/workflows/ci-cd.yaml
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# 4. Commit and push
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git add .gitea/workflows/ci-cd.yaml
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git commit -m "ci: add new feature to workflow"
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git push origin ci/new-feature
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# 5. Create PR and let CI validate
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# 6. Merge after approval
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```
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### Benefits of This Approach
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✅ **No Remote Dependencies** - Test without Gitea instance
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✅ **Instant Feedback** - Catch issues before pushing
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✅ **Reduced PR Churn** - Fewer workflow patch iterations
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✅ **Better Developer Experience** - Local testing = faster iteration
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✅ **Production Confidence** - What works locally works in Gitea
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✅ **Team Efficiency** - No more "wait and see" with remote CI
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### Future Enhancements
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1. **CI/CD Test Script** - Add `act` testing to our CI/CD scripts
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2. **Pre-commit Hook** - Automatically validate workflows before commit
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3. **GitHub Actions Cache** - Speed up local testing with caching
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4. **Matrix Testing** - Test across multiple runner versions
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5. **Workflow Visualization** - Generate diagrams from workflow files
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## Decision Record
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**Approved by:** Arcodange Team
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**Approved on:** 2026-04-05
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**Implementation Owner:** CI/CD Team
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**Reviewers:** Development Team
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**Tested by:** Local `act` dry run
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**Compatibility:** ✅ GitHub Actions ↔ Gitea Actions
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**Change Log:**
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- 2026-04-05: Initial decision and implementation
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- 2026-04-05: Added workflow validation job
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- 2026-04-05: Updated branch protection rules
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- 2026-04-05: Confirmed Gitea/GitHub compatibility via `act` testing
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- 2026-04-05: Documented local development workflow
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