---
# SPDX-FileCopyrightText: 2026 The Linux Foundation
# SPDX-License-Identifier: Apache-2.0

name: Docker Publish
description: "Build and push Docker images tagged with branch name and git tags"

inputs:
  docker-registry:
    description: "Docker registry URL"
    required: false
    default: "docker.io"
  docker-repository:
    description: "Docker repository prefix"
    required: true
  image-name:
    description: "Name of the Docker image"
    required: true
  branch-tag:
    description: "Branch name to use as a Docker image tag"
    required: true
  extra-environment-vars:
    description: "Extra environment variables for make commands"
    required: false
    default: ""
  docker-username:
    description: "Docker registry username"
    required: true
  docker-password:
    description: "Docker registry password"
    required: true

runs:
  using: "composite"
  steps:
    - name: Log in to Docker registry
      uses: docker/login-action@v3
      with:
        registry: ${{ inputs.docker-registry }}
        username: ${{ inputs.docker-username }}
        password: ${{ inputs.docker-password }}

    - name: Get git tags on HEAD
      id: git-tags
      shell: bash
      run: |
        set -eu -o pipefail
        TAGS=$(git tag --points-at HEAD || true)
        echo "tags<<EOF" >> "$GITHUB_OUTPUT"
        echo "$TAGS" >> "$GITHUB_OUTPUT"
        echo "EOF" >> "$GITHUB_OUTPUT"

    - name: Build Docker image with branch tag
      shell: bash
      run: |
        set -eu -o pipefail
        DOCKER_REGISTRY="${{ inputs.docker-registry }}"
        DOCKER_REPOSITORY="${{ inputs.docker-repository }}"
        IMAGE_NAME="${{ inputs.image-name }}"
        BRANCH_NAME="${{ inputs.branch-tag }}"

        echo "Building image with branch tag: ${BRANCH_NAME}"
        ${{ inputs.extra-environment-vars }} \
        DOCKER_TAG="${BRANCH_NAME}" \
        DOCKER_REGISTRY="${DOCKER_REGISTRY}" \
        DOCKER_REPOSITORY="${DOCKER_REPOSITORY}" \
        IMAGE_NAME="${IMAGE_NAME}" \
          make docker-build

    - name: Build Docker images for git tags
      shell: bash
      run: |
        set -eu -o pipefail
        DOCKER_REGISTRY="${{ inputs.docker-registry }}"
        DOCKER_REPOSITORY="${{ inputs.docker-repository }}"
        IMAGE_NAME="${{ inputs.image-name }}"

        TAGS='${{ steps.git-tags.outputs.tags }}'
        if [ -z "$TAGS" ]; then
          echo "No git tags on HEAD, skipping tag builds"
          exit 0
        fi

        while IFS= read -r tag; do
          [ -z "$tag" ] && continue
          # Strip leading 'v' from golang-style version tags
          DOCKER_TAG="${tag#v}"
          echo "Building image with tag: ${DOCKER_TAG}"
          ${{ inputs.extra-environment-vars }} \
          DOCKER_TAG="${DOCKER_TAG}" \
          DOCKER_REGISTRY="${DOCKER_REGISTRY}" \
          DOCKER_REPOSITORY="${DOCKER_REPOSITORY}" \
          IMAGE_NAME="${IMAGE_NAME}" \
            make docker-build
        done <<< "$TAGS"

    - name: Push Docker image with branch tag
      shell: bash
      run: |
        set -eu -o pipefail
        DOCKER_REGISTRY="${{ inputs.docker-registry }}"
        DOCKER_REPOSITORY="${{ inputs.docker-repository }}"
        IMAGE_NAME="${{ inputs.image-name }}"
        BRANCH_NAME="${{ inputs.branch-tag }}"

        echo "Pushing image with branch tag: ${BRANCH_NAME}"
        ${{ inputs.extra-environment-vars }} \
        DOCKER_TAG="${BRANCH_NAME}" \
        DOCKER_REGISTRY="${DOCKER_REGISTRY}" \
        DOCKER_REPOSITORY="${DOCKER_REPOSITORY}" \
        IMAGE_NAME="${IMAGE_NAME}" \
          make docker-push

    - name: Push Docker images for git tags
      shell: bash
      run: |
        set -eu -o pipefail
        DOCKER_REGISTRY="${{ inputs.docker-registry }}"
        DOCKER_REPOSITORY="${{ inputs.docker-repository }}"
        IMAGE_NAME="${{ inputs.image-name }}"

        TAGS='${{ steps.git-tags.outputs.tags }}'
        if [ -z "$TAGS" ]; then
          echo "No git tags on HEAD, skipping tag pushes"
          exit 0
        fi

        while IFS= read -r tag; do
          [ -z "$tag" ] && continue
          # Strip leading 'v' from golang-style version tags
          DOCKER_TAG="${tag#v}"
          echo "Pushing image with tag: ${DOCKER_TAG}"
          ${{ inputs.extra-environment-vars }} \
          DOCKER_TAG="${DOCKER_TAG}" \
          DOCKER_REGISTRY="${DOCKER_REGISTRY}" \
          DOCKER_REPOSITORY="${DOCKER_REPOSITORY}" \
          IMAGE_NAME="${IMAGE_NAME}" \
            make docker-push
        done <<< "$TAGS"

    - name: Log out of Docker registry
      if: always()
      shell: bash
      run: docker logout "${{ inputs.docker-registry }}"