ssh-lite.yml

name: Ubuntu Linux SSH - lite

on:
  workflow_dispatch:
    inputs:
      SSH_MAX_TIME:
        description: "SSH session max duration (1–6 hrs)"
        required: true
        default: "2h"
        type: choice
        options:
          - "1h"
          - "2h"
          - "3h"
          - "4h"
          - "5h"
          - "5h45m"
      NGROK_AUTH_TOKEN:
        description: "ngrok API auth token"
        required: false
        default: ""
      SWAP_SIZE:
        description: "add Swap/virtual RAM in GBs"
        required: false
        default: 16
      START_MINISERVE:
        description: "Enable miniserve HTTP file server"
        type: boolean
        default: true
      START_CLEAN_UP:
        description: "Run disk cleanup (~78GB→125GB free, ~4min)"
        type: boolean
        default: false

jobs:
  github-ssh:
    runs-on: ubuntu-latest
    permissions:
      contents: write

    steps:
      - name: Prepare environment
        id: prepare
        env:
          NGROK_TOKEN: ${{ secrets.NGROK_AUTH_TOKEN }}
        run: |
          NGROK_AUTH_TOKEN=$(jq -r '.inputs.NGROK_AUTH_TOKEN' $GITHUB_EVENT_PATH)
          echo ::add-mask::$NGROK_AUTH_TOKEN
          if [ -n "$NGROK_AUTH_TOKEN" ]; then
            NGROK_TOKEN="$NGROK_AUTH_TOKEN"
          fi
          echo NGROK_TOKEN=$NGROK_TOKEN >> $GITHUB_ENV

          if [ -n "$NGROK_TOKEN" ] && [ "$NGROK_TOKEN" != "null" ]; then
            echo "ngrok_token_not_empty=true" >> $GITHUB_OUTPUT
          else
            echo "ngrok_token_not_empty=false" >> $GITHUB_OUTPUT
          fi

          RAW_SLEEP_TIME="${{ github.event.inputs.SSH_MAX_TIME }}"
          case "$RAW_SLEEP_TIME" in
            1h) SLEEP_TIME=$((1 * 3600)) ;;
            2h) SLEEP_TIME=$((2 * 3600)) ;;
            3h) SLEEP_TIME=$((3 * 3600)) ;;
            4h) SLEEP_TIME=$((4 * 3600)) ;;
            5h) SLEEP_TIME=$((5 * 3600)) ;;
            5h45m) SLEEP_TIME=$((5 * 3600 + 45 * 60)) ;;
          esac
          END_TIME=$((START_TIME + SLEEP_TIME))

          echo "RAW_SLEEP_TIME=$RAW_SLEEP_TIME" >> $GITHUB_ENV
          echo "SLEEP_TIME=$SLEEP_TIME" >> $GITHUB_ENV

          mkdir -p /tmp/logs/miniserve/
          mkdir -p /tmp/logs/cloudflared/
          mkdir -p /tmp/logs/ngrok/

          sudo apt update
          sudo apt install -y jq

      - name: Checkout
        uses: actions/checkout@v4

      - name: Clean-up
        if: ${{ github.event.inputs.START_CLEAN_UP == 'true' }}
        uses: rokibhasansagar/slimhub_actions@main
        with:
          retain: "nodejs_npm"

      - name: Swap Setup
        if: ${{ github.event.inputs.SWAP_SIZE > 0 }}
        uses: pierotofy/set-swap-space@master
        with:
          swap-size-gb: ${{ github.event.inputs.SWAP_SIZE }}

      - name: Install ngrok
        continue-on-error: true
        if: ${{ steps.prepare.outputs.ngrok_token_not_empty == 'true' }}
        run: |
          echo "test: $NGROK_TOKEN"
          curl -s https://ngrok-agent.s3.amazonaws.com/ngrok.asc | sudo tee /etc/apt/trusted.gpg.d/ngrok.asc >/dev/null
          echo "deb https://ngrok-agent.s3.amazonaws.com buster main" | sudo tee /etc/apt/sources.list.d/ngrok.list
          sudo apt update && sudo apt install -y ngrok

      - name: Install cloudflared
        continue-on-error: true
        run: |
          sudo mkdir -p --mode=0755 /usr/share/keyrings
          curl -fsSL https://pkg.cloudflare.com/cloudflare-main.gpg | sudo tee /usr/share/keyrings/cloudflare-main.gpg >/dev/null
          echo 'deb [signed-by=/usr/share/keyrings/cloudflare-main.gpg] https://pkg.cloudflare.com/cloudflared noble main' | sudo tee /etc/apt/sources.list.d/cloudflared.list
          sudo apt update && sudo apt install -y cloudflared

      - name: Setup SSH server
        run: |
          sudo apt install -y openssh-server
          sudo mkdir -p /var/run/sshd
          sudo useradd -m -s /bin/bash debuguser
          echo "debuguser:password" | sudo chpasswd
          sudo mkdir -p /home/debuguser/.ssh
          echo "${{ secrets.SSH_PUBLIC_KEY }}" | sudo tee /home/debuguser/.ssh/authorized_keys
          sudo chown -R debuguser:debuguser /home/debuguser/.ssh
          sudo chmod 600 /home/debuguser/.ssh/authorized_keys
          echo "debuguser ALL=(ALL) NOPASSWD:ALL" | sudo tee /etc/sudoers.d/debuguser
          sudo service ssh start

      - name: Start miniserve
        if: ${{ github.event.inputs.START_MINISERVE == 'true' }}
        run: |
          wget -q -nc https://github.com/svenstaro/miniserve/releases/download/v0.33.0/miniserve-0.33.0-x86_64-unknown-linux-gnu
          chmod +x ./miniserve-0.33.0-x86_64-unknown-linux-gnu
          nohup sudo ./miniserve-0.33.0-x86_64-unknown-linux-gnu / \
          -p 8080 \
          -i 0.0.0.0 \
          --hidden \
          --upload-files \
          --mkdir \
          --show-symlink-info \
          --index index.html \
          --header "Access-Control-Allow-Origin: *" \
          --verbose \
          > /tmp/logs/miniserve/latest.log 2>&1 &

      - name: Start ngrok
        if: ${{ steps.prepare.outputs.ngrok_token_not_empty == 'true' }}
        continue-on-error: true
        run: |
          cd $GITHUB_WORKSPACE
          pwd
          chmod +x gen_ngrok_config.sh
          ./gen_ngrok_config.sh "$NGROK_TOKEN"
          nohup ngrok start --all --config=./ngrok.yml > /tmp/logs/ngrok/latest.log &
          sleep 5
          echo "⏳ sleep for 5 seconds"

          ngrok_dashboard_url=$(curl -s localhost:4040/api/tunnels | jq -r '.tunnels[] | select(.name=="dashboard" and .proto=="https") | .public_url')
          ngrok_ssh_url=$(curl -s localhost:4040/api/tunnels | jq -r '.tunnels[] | select(.name=="ssh_server") | .public_url')  
          ngrok_miniserve_url=$(curl -s localhost:4040/api/tunnels | jq -r '.tunnels[] | select(.name=="miniserve" and .proto=="https") | .public_url')
          ngrok_ssh_host=$(echo "$ngrok_ssh_url" | sed -E 's#^tcp://([^:]+):.*#\1#')
          ngrok_ssh_port=$(echo "$ngrok_ssh_url" | sed -E 's#^tcp://[^:]+:(.*)$#\1#')

          echo "🌐 Miniserve available at: $ngrok_miniserve_url"
          echo "🔑 Connect with: ssh debuguser@$ngrok_ssh_host -p $ngrok_ssh_port"
          echo "🔑 Connect with: sshpass -p 'password' ssh -o StrictHostKeyChecking=no debuguser@$ngrok_ssh_host -p $ngrok_ssh_port"
          echo "👤 Default username: debuguser"
          echo "🔑 Default password: password"          
          echo "TUNNEL: $ngrok_ssh_url"

      - name: Start cloudflared
        continue-on-error: true
        run: |
          nohup cloudflared tunnel --url http://localhost:80 2> /tmp/logs/cloudflared/dashboard.log &
          nohup cloudflared tunnel --url http://localhost:8080 2> /tmp/logs/cloudflared/miniserve.log &
          nohup cloudflared tunnel --url ssh://localhost:22 2> /tmp/logs/cloudflared/ssh.log &
          sleep 10
          echo "⏳ sleep for 10 seconds"

          cloudflared_dashboard_url=$(grep -m1 -oE "https?://[a-zA-Z0-9.-]+\.trycloudflare\.com" /tmp/logs/cloudflared/dashboard.log)
          cloudflared_miniserve_url=$(grep -m1 -oE "https?://[a-zA-Z0-9.-]+\.trycloudflare\.com" /tmp/logs/cloudflared/miniserve.log)
          cloudflared_ssh_url=$(grep -m1 -oE "https?://[a-zA-Z0-9.-]+\.trycloudflare\.com" /tmp/logs/cloudflared/ssh.log)
          cloudflared_ssh_host=$(echo "$cloudflared_ssh_url" | sed -E 's#https?://##')

          echo "🌐 Miniserve available at: $cloudflared_miniserve_url"
          echo "🔑 Connect with: ssh -o ProxyCommand=\"cloudflared access ssh --hostname %h\" debuguser@$cloudflared_ssh_host"
          echo "🔑 Connect with: sshpass -p 'password' ssh -o StrictHostKeyChecking=no -o ProxyCommand=\"cloudflared access ssh --hostname %h\" debuguser@$cloudflared_ssh_host"
          echo "👤 Default username: debuguser"          
          echo "🔑 Default password: password"
          echo "TUNNEL: $cloudflared_ssh_url"

      - name: Keep session alive
        run: |
          trap '' SIGINT SIGTERM
          cd $GITHUB_WORKSPACE/backend
          echo "⏳ Keeping SSH session alive for $RAW_TIME ($SLEEP_TIME seconds)"
          echo "🔗 Updates available at: https://github.com/chunix64/github-action-ssh"
          sleep "$SLEEP_TIME" || true