# Gitea CI/CD Deployment Guide

This document describes how to **self-host Gitea** on an external server and migrate CI/CD from GitLab to **Gitea Actions** (GitHub Actions-compatible).

---

## Why Gitea?

- Lightweight, self-hosted Git forge (single binary or Docker image)
- Built-in CI/CD via **Gitea Actions** (GitHub Actions-compatible YAML)
- Built-in migration tool imports repos, issues, and PRs from GitLab
- Low resource usage compared to GitLab

---

## 1. Server Prerequisites

```bash
# Ubuntu/Debian
sudo apt update && sudo apt install -y docker.io docker-compose-plugin
sudo systemctl enable --now docker
sudo usermod -aG docker $USER   # log out/in after this
```

---

## 2. Gitea Server Setup (Docker Compose)

Create a directory on your server:

```bash
mkdir -p ~/gitea && cd ~/gitea
```

Create `docker-compose.yml`:

```yaml
services:
  gitea:
    image: gitea/gitea:latest
    container_name: gitea
    restart: always
    environment:
      - USER_UID=1000
      - USER_GID=1000
      - GITEA__database__DB_TYPE=postgres
      - GITEA__database__HOST=gitea-db:5432
      - GITEA__database__NAME=gitea
      - GITEA__database__USER=gitea
      - GITEA__database__PASSWD=<CHANGE_ME>
      - GITEA__server__ROOT_URL=https://git.yourdomain.com/
      - GITEA__server__SSH_DOMAIN=git.yourdomain.com
      - GITEA__server__DOMAIN=git.yourdomain.com
      - GITEA__actions__ENABLED=true
    volumes:
      - gitea-data:/data
      - /etc/timezone:/etc/timezone:ro
      - /etc/localtime:/etc/localtime:ro
    ports:
      - "3000:3000"   # Web UI
      - "2222:22"     # SSH (Git over SSH)
    depends_on:
      gitea-db:
        condition: service_healthy

  gitea-db:
    image: postgres:15
    container_name: gitea-db
    restart: always
    environment:
      POSTGRES_DB: gitea
      POSTGRES_USER: gitea
      POSTGRES_PASSWORD: <CHANGE_ME>
    volumes:
      - gitea-db-data:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U gitea"]
      interval: 10s
      timeout: 5s
      retries: 5

  # Gitea Actions runner — executes CI workflows
  gitea-runner:
    image: gitea/act_runner:latest
    container_name: gitea-runner
    restart: always
    environment:
      GITEA_INSTANCE_URL: http://gitea:3000
      GITEA_RUNNER_REGISTRATION_TOKEN: <RUNNER_TOKEN>
      GITEA_RUNNER_NAME: default-runner
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - gitea-runner-data:/data
    depends_on:
      - gitea

volumes:
  gitea-data:
  gitea-db-data:
  gitea-runner-data:
```

!!! warning "Replace placeholders"
    Replace `<CHANGE_ME>` with a strong database password and `<RUNNER_TOKEN>` with the token from step 4.

Start Gitea and the database first:

```bash
docker compose up -d gitea gitea-db
```

Visit `http://your-server-ip:3000` and complete the initial setup wizard.

---

## 3. Reverse Proxy with HTTPS (Nginx + Let's Encrypt)

```bash
sudo apt install -y nginx certbot python3-certbot-nginx
```

Create `/etc/nginx/sites-available/gitea`:

```nginx
server {
    server_name git.yourdomain.com;

    location / {
        proxy_pass http://127.0.0.1:3000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        client_max_body_size 100M;
    }
}
```

Enable and get a certificate:

```bash
sudo ln -s /etc/nginx/sites-available/gitea /etc/nginx/sites-enabled/
sudo certbot --nginx -d git.yourdomain.com
sudo systemctl reload nginx
```

---

## 4. Enable Actions & Register the Runner

1. Go to **Site Administration > Runners** in the Gitea web UI.
2. Click **Create new Runner** and copy the registration token.
3. Paste the token into `docker-compose.yml` as `GITEA_RUNNER_REGISTRATION_TOKEN`.
4. Start the runner:

```bash
docker compose up -d gitea-runner
```

Verify the runner appears as **Online** in the admin panel.

---

## 5. Migrate Your Repository

### Option A: Git push (code only)

```bash
# On your local machine
cd /path/to/letzshop-product-import
git remote add gitea ssh://git@git.yourdomain.com:2222/your-username/letzshop-product-import.git
git push gitea --all
git push gitea --tags
```

### Option B: Gitea built-in migration (code + issues + PRs)

1. In Gitea, click **+** > **New Migration**.
2. Select **GitLab** as the source.
3. Enter your GitLab URL and a Personal Access Token.
4. Gitea will import the repository, issues, labels, milestones, and merge requests.

---

## 6. CI/CD — GitLab vs Gitea Actions

The workflow file lives in `.gitea/workflows/ci.yml` (already created in this repository).

| GitLab CI (`.gitlab-ci.yml`) | Gitea Actions (`.gitea/workflows/ci.yml`) |
|------------------------------|-------------------------------------------|
| `stages:` + `stage:` per job | Jobs run in parallel; use `needs:` for ordering |
| `services:` (top-level on job) | `services:` nested under each job with `options:` |
| `allow_failure: true` | `continue-on-error: true` |
| `rules: - if:` | `on:` triggers + `if:` conditionals per job |
| `artifacts: paths:` | `actions/upload-artifact@v4` |
| `cache: paths:` | `actions/cache@v4` |
| `coverage: '/regex/'` | Use coverage action or parse in step |
| CI/CD Variables (UI) | Repository **Settings > Secrets** |

---

## 7. CI/CD Secrets

Configure these in your Gitea repository under **Settings > Actions > Secrets**:

| Secret | Description | Used by |
|--------|-------------|---------|
| `SSH_PRIVATE_KEY` | Private key for deployment server | Deploy job (if added) |
| `SERVER_HOST` | Production server IP/hostname | Deploy job |
| `SERVER_USER` | SSH user on production server | Deploy job |
| `SERVER_PATH` | App directory on server | Deploy job |

---

## 8. Pipeline Overview

The CI pipeline (`.gitea/workflows/ci.yml`) runs:

```
push/PR to master
├── ruff          (lint)
├── pytest        (tests + PostgreSQL service)
├── architecture  (architecture validation)
├── dependency-scanning  (pip-audit, non-blocking)
├── audit         (custom audit, non-blocking)
└── docs          (mkdocs build, master-only, after lint+test pass)
```

All jobs run in parallel except `docs`, which waits for `ruff`, `pytest`, and `architecture` to pass.

---

## 9. Adding a Deploy Job (Optional)

To add automated deployment via SSH (similar to the GitLab deploy stage), add this job to `.gitea/workflows/ci.yml`:

```yaml
  deploy:
    runs-on: ubuntu-latest
    if: github.event_name == 'push' && github.ref == 'refs/heads/master'
    needs: [ruff, pytest, architecture]
    steps:
      - uses: actions/checkout@v4

      - name: Deploy via SSH
        uses: appleboy/ssh-action@v1
        with:
          host: ${{ secrets.SERVER_HOST }}
          username: ${{ secrets.SERVER_USER }}
          key: ${{ secrets.SSH_PRIVATE_KEY }}
          script: |
            cd ${{ secrets.SERVER_PATH }}
            git pull origin master
            source .venv/bin/activate
            uv sync --frozen
            python -m alembic upgrade head
            sudo systemctl restart wizamart
```

---

## 10. Firewall Configuration

```bash
sudo ufw allow OpenSSH
sudo ufw allow 'Nginx Full'
sudo ufw enable
```

---

## 11. Maintenance

```bash
# View Gitea logs
docker compose -f ~/gitea/docker-compose.yml logs -f gitea

# View runner logs
docker compose -f ~/gitea/docker-compose.yml logs -f gitea-runner

# Update Gitea
cd ~/gitea
docker compose pull
docker compose up -d

# Backup Gitea data
docker run --rm -v gitea-data:/data -v $(pwd):/backup alpine \
    tar czf /backup/gitea-backup-$(date +%Y%m%d).tar.gz /data
```

---

## 12. Removing GitLab (After Migration)

Once you have verified everything works on Gitea:

1. Update your local git remote:
    ```bash
    git remote set-url origin ssh://git@git.yourdomain.com:2222/your-username/letzshop-product-import.git
    ```
2. The `.gitlab-ci.yml` file can be removed from the repository.
3. Archive or delete the GitLab project.