Deploying Wyn Applications

Deploy your Wyn app to any server with one command.

Setup

Add a [deploy] section to your wyn.toml:

[project]
name = "myapp"
version = "1.0.0"
entry = "src/main.wyn"

[deploy.dev]
host = "dev.example.com"
user = "deploy"
key = "~/.ssh/id_ed25519"
path = "/opt/myapp"
os = "linux"
pre = "systemctl stop myapp"
post = "systemctl start myapp"

[deploy.prod]
host = "example.com"
user = "deploy"
key = "~/.ssh/id_ed25519"
path = "/opt/myapp"
os = "linux"
pre = "systemctl stop myapp"
post = "systemctl start myapp"

Deploy

wyn deploy dev              # Deploy to dev
wyn deploy prod             # Deploy to production
wyn deploy dev --dry-run    # Preview without executing

What Happens

1. Cross-compiles your app for the target OS
2. Runs the pre command on the server (e.g., stop the service)
3. Uploads the binary via SCP
4. Runs the post command (e.g., start the service)

Other Commands

wyn ssh dev             # SSH into the dev server
wyn logs dev            # Tail the service logs

Systemd Service

Create /etc/systemd/system/myapp.service on the server:

[Unit]
Description=My Wyn App

[Service]
ExecStart=/opt/myapp/myapp
Restart=always
User=deploy

[Install]
WantedBy=multi-user.target

Then: sudo systemctl enable myapp

Docker Deployment

For containerized deployment, see the Docker Deployment guide. Wyn produces images as small as 5MB using scratch base images.

CI/CD

Automate builds and deployments with GitHub Actions. A typical Wyn CI pipeline runs in under 30 seconds.

See Also

• Docker Deployment - Dockerfiles and container best practices
• GitHub Actions CI/CD - automate builds and deploys
• Cross-Compilation - build for Linux, Windows, and macOS
• Build a Web Server - HTTP server tutorial
• CLI Commands - wyn deploy, wyn build, wyn ssh reference

See Also

• Cross-Compilation - build for other platforms
• CLI Commands - all wyn commands
• Best Practices - production patterns