action.yml

name: Setup SSH agent
description: "A composite action to setup and configure the SSH agent for connecting to a remote host."
author: Dr. Kibitz (@drkibitz)

inputs:
  port:
    description: "The port to connect to the SSH server (default: 22)."
    required: false
    default: "22"
  username:
    description: "The username for SSH authentication."
    required: true
  hostname:
    description: "The hostname or IP address of the SSH server."
    required: true
  ssh-private-key:
    description: "The SSH private key used to authenticate with the SSH server."
    required: true

runs:
  using: composite
  steps:
    - name: Setup SSH agent
      run: |
        mkdir -p ~/.ssh/ && touch ~/.ssh/known_hosts
        eval $(ssh-agent -s)
        ssh-keyscan -p ${{ inputs.port }} ${{ inputs.hostname }} >> ~/.ssh/known_hosts 2>/dev/null
        echo "${{ inputs.ssh-private-key }}" | ssh-add -
        ssh -T -n -o BatchMode=yes -p ${{ inputs.port }} ${{ inputs.username }}@${{ inputs.hostname }}
        echo "SSH_AUTH_SOCK=$SSH_AUTH_SOCK" >> "$GITHUB_ENV"
      shell: bash