build.yml

name: Build image

on:
  push:
    tags:
      - "*"

  workflow_dispatch:

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v3
        with:
          fetch-depth: 1

      - name: Create docker tag if trigger event is 'push'
        if: ${{ github.event_name == 'push' }}
        shell: bash
        run: echo "DOCKER_TAG=$GITHUB_REF_NAME" >> $GITHUB_ENV

      - name: Create docker tag if trigger event is 'workflow_dispatch'
        if: ${{ github.event_name == 'workflow_dispatch' }}
        shell: bash
        run: |
          if [[ ${{ github.ref_type == 'tag' }} ]]; then
            echo "DOCKER_TAG=$GITHUB_REF_NAME" >> $GITHUB_ENV
          else
            git fetch origin $GITHUB_REF_NAME
            echo "DOCKER_TAG=$(git rev-parse '$GITHUB_REF_NAME^{commit}')" >> $GITHUB_ENV
          fi