name: SSH 준비
description: SSH 키를 설정하고 호스트를 known_hosts에 추가하는 스크립트

inputs:
  ssh-key:
    required: true
  host:
    required: true
  port:
    required: false
    default: "22"
  key-path:
    required: false
    default: ~/.ssh/deploy_key

runs:
  using: composite
  steps:
    - shell: bash
      run: |
        set -eu

        SUDO=""
        [ "$(id -u)" -ne 0 ] && SUDO="sudo"

        if ! command -v ssh-keyscan >/dev/null 2>&1; then
          if command -v apt-get >/dev/null 2>&1; then
            $SUDO apt-get update
            $SUDO apt-get install -y --no-install-recommends openssh-client
          else
            echo "ssh-keyscan이 없습니다. openssh-client를 설치한 러너가 필요합니다."
            exit 1
          fi
        fi

        mkdir -p ~/.ssh
        chmod 700 ~/.ssh

        KEY_PATH="${{ inputs.key-path }}"
        case "$KEY_PATH" in
          "~/"*) KEY_PATH="$HOME/${KEY_PATH#\~/}" ;;
        esac
        mkdir -p "$(dirname "$KEY_PATH")"

        printf '%s\n' "${{ inputs.ssh-key }}" > "$KEY_PATH"
        chmod 600 "$KEY_PATH"

        ssh-keyscan -p ${{ inputs.port }} -H "${{ inputs.host }}" >> ~/.ssh/known_hosts