# Composite action for logging into Docker registries (GHCR and/or DockerHub).
# Centralizes the login pattern used across multiple Docker workflows.

name: 'Docker Registry Login'
description: 'Login to GitHub Container Registry and/or DockerHub'

inputs:
  login-ghcr:
    description: 'Login to GitHub Container Registry'
    required: false
    default: 'true'
  login-dockerhub:
    description: 'Login to DockerHub'
    required: false
    default: 'false'
  login-dhi:
    description: 'Login to Docker Hardened Images registry (dhi.io)'
    required: false
    default: 'false'
  dockerhub-username:
    description: 'DockerHub username (required if login-dockerhub or login-dhi is true)'
    required: false
  dockerhub-password:
    description: 'DockerHub password (required if login-dockerhub or login-dhi is true)'
    required: false

runs:
  using: 'composite'
  steps:
    - name: Login to GitHub Container Registry
      if: inputs.login-ghcr == 'true'
      uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
      with:
        registry: ghcr.io
        username: ${{ github.actor }}
        password: ${{ github.token }}

    - name: Login to DockerHub
      if: inputs.login-dockerhub == 'true'
      uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
      with:
        username: ${{ inputs.dockerhub-username }}
        password: ${{ inputs.dockerhub-password }}

    - name: Login to DHI Registry
      if: inputs.login-dhi == 'true'
      uses: docker/login-action@5e57cd118135c172c3672efd75eb46360885c0ef # v3.6.0
      with:
        registry: dhi.io
        username: ${{ inputs.dockerhub-username }}
        password: ${{ inputs.dockerhub-password }}