main.yml

# Derived from an example provided by https://blog.benoitblanchon.fr/github-action-run-ssh-commands/
#                                     https://github.blog/2015-06-16-read-only-deploy-keys/
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name: Deploy
on: [push]
jobs:
  deploy:
    name: "Deploy to server"
    runs-on: ubuntu-latest
    steps:
      - name: configure SSH
        run: |
          # These are very useful for debugging
          echo "Repository = ${{ github.repository }}"
          echo "github url = ${{ github.server_url }}"
          echo "Owner =  ${{ github.repository_owner }}"
          echo "Repository name = ${{ github.event.repository.name }}"
          echo "Service name = ${{ vars.service_name }}"
          echo "http port = ${{ vars.http_port }}"
          echo "websocket port = ${{ vars.websocket_port }}"
          echo "version = ${{ github.sha }}"
          # On to the work at hand.
          mkdir -p ~/.ssh/
          echo "${{ secrets.SSH_PRIVATE_KEY }}" > ~/.ssh/production.key
          chmod 600 ~/.ssh/production.key
          cat >>~/.ssh/config <<END
          Host production
            HostName ${{ secrets.SSH_HOST }}
            User ${{ secrets.SSH_USER }}
            IdentityFile ~/.ssh/production.key
            StrictHostKeyChecking no
          END
                         
      - name: get source code and compile
        run: |
          echo "deleting the directory ${{ github.event.repository.name }} "
          ssh production "rm -rf  ${{ github.event.repository.name }}"
          echo "cloning  ${{ github.server_url }}/${{ github.repository }}"
          ssh production "git clone ${{ github.server_url }}/${{ github.repository }}"
          ssh production "cd  ${{ github.event.repository.name }};mvn clean compile package"
        
      - name: create systemd unit file
        run: |
           # without enable-linger, you must be logged in. So, we enable it.
           ssh production "loginctl enable-linger"
           ssh production "mkdir --parents .config/systemd/user"
           ssh production "rm -f .config/systemd/user/${{ vars.service_name }}.service"
           ssh production 'echo "[Unit]" >> .config/systemd/user/${{ vars.service_name }}.service'
           ssh production 'echo "Description=${{ vars.service_name }}" >> .config/systemd/user/${{ vars.service_name }}.service'
           ssh production 'echo "[Service]" >> .config/systemd/user/${{ vars.service_name }}.service'
           ssh production 'echo "Type=simple" >> .config/systemd/user/${{ vars.service_name }}.service'
           ssh production 'echo "Restart=always" >> .config/systemd/user/${{ vars.service_name }}.service'
           ssh production 'echo "RestartSec=5" >> .config/systemd/user/${{ vars.service_name }}.service'
           ssh production 'echo "Environment=VERSION=\"${{ github.sha }}\"" >>.config/systemd/user/${{ vars.service_name }}.service'
           ssh production 'echo "Environment=WEBSOCKET_PORT=${{ vars.websocket_port }}" >>.config/systemd/user/${{ vars.service_name }}.service'
           ssh production 'echo "Environment=HTTP_PORT=${{ vars.http_port }}" >>.config/systemd/user/${{ vars.service_name }}.service'
           ssh production 'echo "ExecStart=mvn exec:java -Dexec.mainClass=uta.cse3310.App" >> .config/systemd/user/${{ vars.service_name }}.service'
           ssh production 'echo "WorkingDirectory=$PWD/${{ github.event.repository.name }}" >> .config/systemd/user/${{ vars.service_name }}.service'
           ssh production 'echo "[Install]" >>.config/systemd/user/${{ vars.service_name }}.service'
           ssh production 'echo "WantedBy=default.target" >>.config/systemd/user/${{ vars.service_name }}.service'
      - name: systemd reload
        run: |
            ssh production "systemctl --user daemon-reload"
           
      - name: restart daemon
        run: |
           ssh production "systemctl --user enable  ${{ vars.service_name }}"
           ssh production "systemctl --user restart ${{ vars.service_name }}"
           ssh production "systemctl --user status  ${{ vars.service_name }}"