release.yml

name: Release
on:
    push:
        tags:
            - "v*"

env:
    IMAGE_NAME: unitystation/central-command
jobs:
    docker:
        runs-on: ubuntu-latest
        steps:
            -   uses: actions/checkout@v4

            -   name: Extract Tag Name
                id: extract_tag
                run: echo "::set-output name=tag::${GITHUB_REF#refs/tags/}"

            -   name: Build docker image with tag
                run: |
                    docker pull $IMAGE_NAME:latest
                    docker build --pull --cache-from $IMAGE_NAME:latest -t $IMAGE_NAME:${{ steps.extract_tag.outputs.tag }} .

            -   name: Tag image as stable
                run: |
                    docker tag $IMAGE_NAME:${{ steps.extract_tag.outputs.tag }} $IMAGE_NAME:stable

            -   name: Log in into Docker Hub
                run: |
                    echo "${{ secrets.DOCKER_PASSWORD }}" | docker login -u ${{ secrets.DOCKER_USERNAME }} --password-stdin

            -   name: Push tagged image to registry
                run: |
                    docker push $IMAGE_NAME:${{ steps.extract_tag.outputs.tag }}

            -   name: Push stable image to registry
                run: |
                    docker push $IMAGE_NAME:stable