build-telemetry-self-monitor-image.yml

name: Telemetry Self Monitor Image Builder

on:
  pull_request_target:
    paths:
      - "dependencies/telemetry-self-monitor/**"
    types: [ opened, edited, synchronize, reopened, ready_for_review ]
  push:
    branches:
      - main
    paths:
      - "dependencies/telemetry-self-monitor/**"
  workflow_dispatch:

jobs:
  envs:
    runs-on: ubuntu-latest
    outputs:
      build-args: ${{ steps.prepare-envs.outputs.build-args }}
      build-tag: ${{ steps.build-tag.outputs.build-tag || '' }}

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Fetch new env file
        run: |
          git fetch origin ${{ github.event.pull_request.head.sha }}
          git checkout ${{ github.event.pull_request.head.sha }} --no-overlay -- dependencies/telemetry-self-monitor/envs
        if: github.event_name == 'pull_request_target'

      - name: Prepare Envs
        id: prepare-envs
        run: |
          {
          # this creates a multiline string with the envs. 
          # Everything between `build-args<<BUILD_ARGS` and BUILD_ARGS will be content of the build-args variable.
          echo 'build-args<<BUILD_ARGS'
          cat dependencies/telemetry-self-monitor/envs
          echo BUILD_ARGS

          } >> "$GITHUB_OUTPUT"

      - name: load envs into output
        id: load-envs
        run: |
          cat dependencies/telemetry-self-monitor/envs >> "$GITHUB_OUTPUT"

      - name: get commit short sha
        id: get-short-sha
        run: echo "short-sha=$(git rev-parse --short $GITHUB_SHA)" >> $GITHUB_OUTPUT

      - name: build image tag
        id: build-tag
        run: echo "build-tag=${{ steps.load-envs.outputs.PROMETHEUS_VERSION }}-${{ steps.get-short-sha.outputs.short-sha }}" >> $GITHUB_OUTPUT
        if: github.event_name == 'push'

  build-image:
    needs: envs
    uses: kyma-project/test-infra/.github/workflows/image-builder.yml@main
    with:
      name: tpi/telemetry-self-monitor
      dockerfile: Dockerfile
      context: dependencies/telemetry-self-monitor
      build-args: ${{ needs.envs.outputs.build-args }}
      tags: ${{ needs.envs.outputs.build-tag }}
  list-images:
    needs: build-image
    runs-on: ubuntu-latest
    steps:
      - name: List images
        run: |
          echo "${{ needs.build-image.outputs.images }}"