deploy-dev.yml

name: Deploy to Dev

on:
  workflow_dispatch:
    inputs:
      image-tag:
        type: string
        description: "The tag of the docker images to deploy (default: pr-<number> of branch or latest)"

jobs:
  check-if-image-exists:
    runs-on: ubuntu-latest
    steps:
      - name: Retrieve Image Tag
        id: retrieve-image-tag
        run: |
          if [ -n "${{ inputs.image-tag }}" ]; then
            echo "image-tag=${{ inputs.image-tag }}" >> $GITHUB_OUTPUT
            exit 0
          fi

          REF=$(echo "${{ github.event.ref }}" | sed -n 's#^refs/heads/##p')
          # If ref = main
          if [ "$REF" = "main" ]; then
            echo "image-tag=latest" >> $GITHUB_OUTPUT
          fi

          PULLS=$(curl -s -H "Authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" "https://api.github.com/repos/${{ github.repository }}/pulls?head=${{ github.repository_owner }}:${REF}")
          PR_NUMBER=$(echo "$PULLS" | jq -r '.[0].number')

          if [ -z "$PR_NUMBER" ]; then
            echo "No PR found for branch $REF."
            exit 1
          else
            echo "PR #$PR_NUMBER found for branch $REF."
            echo "image-tag=pr-$PR_NUMBER" >> $GITHUB_OUTPUT
          fi

      - name: Check if image exists
        run: |
          IMAGE_NAME=ls1intum/apollon_standalone
          IMAGE_TAG="${{ steps.retrieve-image-tag.outputs.image-tag }}"

          ENCODED_TOKEN=$(echo -n "${{ secrets.GITHUB_TOKEN }}" | base64)
          TAG_EXISTS=$(curl -s -H "Authorization: Bearer ${ENCODED_TOKEN}" \
            https://ghcr.io/v2/${IMAGE_NAME}/tags/list \
            | jq -r --arg TAG "${IMAGE_TAG}" '.tags[] | select(. == $TAG)')
          
          if [ -z "$TAG_EXISTS" ]; then
            echo "Image ${IMAGE_NAME}:${IMAGE_TAG} does not exist."
            exit 1
          else
            echo "Image ${IMAGE_NAME}:${IMAGE_TAG} exists."
          fi

  deploy:
    needs: check-if-image-exists
    # TODO: uses: ls1intum/.github/.github/workflows/deploy-docker-compose.yml@main
    uses: ./.github/workflows/deploy-docker-compose-shared.yml
    with:
      environment: Dev
      docker-compose-file: "./docker-compose.prod.yml"
      image-tag: ${{ needs.retrieve-image-tag.outputs.image-tag }}
      env-vars: |
        DEPLOYMENT_URL=${{ vars.DEPLOYMENT_URL }}
        APOLLON_REDIS_DIAGRAM_TTL=${{ vars.APOLLON_REDIS_DIAGRAM_TTL }}
    secrets: inherit