MapLibreParticleLab/.github/actions/download-workflow-run-artifact/action.yml

name: 'Download workflow_run artifact'
description: 'Downloads and unzips artifact from workflow that triggered workflow_run'
inputs:
  artifact-name:
    description: 'Name of artifact'
    required: true
  expect-files:
    description: 'Check for existence of expected files'
    required: false
runs:
  using: "composite"
  steps:
    # https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#workflow_run
    - name: Download ${{ inputs.artifact-name }} artifact
      uses: actions/github-script@v6
      with:
        script: |
          let allArtifacts = await github.rest.actions.listWorkflowRunArtifacts({
              owner: context.repo.owner,
              repo: context.repo.repo,
              run_id: context.payload.workflow_run.id,
          });
          let matchArtifact = allArtifacts.data.artifacts.filter((artifact) => {
            return artifact.name == "${{ inputs.artifact-name }}"
          })[0];
          if (!matchArtifact) {
            console.log("Could not find artifact '${{ inputs.artifact-name }}'");
            return;
          }
          let download = await github.rest.actions.downloadArtifact({
              owner: context.repo.owner,
              repo: context.repo.repo,
              artifact_id: matchArtifact.id,
              archive_format: 'zip',
          });
          let fs = require('fs');
          fs.writeFileSync(`${process.env.GITHUB_WORKSPACE}/${{ inputs.artifact-name }}.zip`, Buffer.from(download.data));

    - name: "Check .zip file existence"
      id: zip_exists
      uses: andstor/file-existence-action@v2.0.0
      with:
        files: ${{ inputs.artifact-name }}.zip

    - name: Unzip artifact
      shell: bash
      if: steps.zip_exists.outputs.files_exists == 'true'
      run: unzip ${{ inputs.artifact-name }}.zip

    - name: "Check file existence"
      uses: andstor/file-existence-action@v2.0.0
      if: ${{ inputs.expect-files }}
      with:
        fail: true
        files: ${{ inputs.expect-files }}