action.yml

name: 'SSH key generation'
description: 'To generate an SSH key'
inputs:
  comment:
    description: 'A comment to help you to identify the key, e.g. your email etc.'
    required: false
  encryption:
    # dsa | ecdsa | ed25519 | rsa
    description: 'Encryption type'
    required: true
    default: 'rsa'
  bits:
    description: 'Bits'
    required: true
    default: '4096'
runs:
  using: "composite"
  steps:
    - name: Generate the key
      run: |
        comment=${{ inputs.comment }}
        [ -z $comment ] && comment="${GITHUB_REPOSITORY}-$(date +%s)"
        echo $comment
        encryption=${{ inputs.encryption }}
        bits=${{ inputs.bits }}
        ssh-keygen -t $encryption -b $bits -C $comment -f key -N ""
      shell: bash
    - name: Rename key files
      run: |
        mv key private_key.txt
        mv key.pub public_key.txt
      shell: bash
    - name: Store the key files in the repo
      run: |
        # git commit if there's any change
        if test -n "$(git status --porcelain 2>/dev/null)"; then
            git config --local user.email "41898282+github-actions[bot]@users.noreply.github.com"
            git config --local user.name "github-actions[bot]"
            git add .
            git commit -m "Update a new key"
            git push origin ${GITHUB_REF##*/}
        fi
      shell: bash
branding:
  icon: 'lock'
  color: 'green'