name: SSH runner
description: run commands on SSH hosts
inputs:
  host:
    description: SSH host
    required: true
  user:
    description: SSH user
    required: true
  key:
    description: SSH private key
    required: true
  script:
    description: commands to run via SSH
    required: true

runs:
  using: "composite"
  steps:
    - name: setup ssh
      shell: bash
      run: |
        mkdir -p ~/.ssh
        echo "${{ inputs.key }}" > ~/.ssh/id_rsa
        chmod 600 ~/.ssh/id_rsa

    - name: add remote host to known_hosts
      shell: bash
      run: ssh-keyscan -H "${{ inputs.host }}" >> ~/.ssh/known_hosts

    - name: run on docker host
      shell: bash
      run: |
        ssh ${{ inputs.user }}@${{ inputs.host }} << 'EOF'
        ${{ inputs.script }}
        EOF