codegen.yaml

on:
  schedule:
  # Runs at 12:30, 1:30 and 2:30.
  - cron: '30 0-2 * * *'
  workflow_dispatch:

name: codegen
jobs:
  discovery:
    # As of November 2023, it returns 269 service names.
    uses: googleapis/discovery-artifact-manager/.github/workflows/list-services.yml@master
  total_service_size_check:
    runs-on: ubuntu-20.04
    needs: discovery
    steps:
      - uses: actions/github-script@v5
        id: chunk
        with:
          script: |
            console.log('checking size of services')
            const MAX_SERVICE_SIZE = 300 // 00:30 to 02:30 implies 3 batches of size 100
            const services = ${{ needs.discovery.outputs.services }}
            if (services.length > MAX_SERVICE_SIZE) {
              throw new Error(`Total services (${services.length}) exceed limit of ${MAX_SERVICE_SIZE}`)
            }
  batch:
    runs-on: ubuntu-20.04
    needs: discovery
    outputs:
      # As of November 2023, the output of batch job is a 3-element array, which contains a chunk of 100 service names
      # at the index 0, a chunk of other 100 service names at the index 1, and a chunk of remaining 69 service names
      # at the index 2.
      services: ${{ steps.chunk.outputs.result }}
    steps:
      - uses: actions/github-script@v5
        id: chunk
        with:
          script: |
            console.log('splitting service names list into batches')
            const services = ${{ needs.discovery.outputs.services }}
            const excludedServices = ['contentwarehouse']
            const filteredServices = services.filter(service => !excludedServices.includes(service))
            const hour = new Date().getHours()
            const MAX_BATCH_SIZE = 100
            const result = {
              batches: [],
              hour: new Date().getHours(),
            };
            for (let i = 0; i < filteredServices.length; i += MAX_BATCH_SIZE) {
              result.batches.push(filteredServices.slice(i, i + MAX_BATCH_SIZE))
            }
            return result
  generate:
    uses: googleapis/google-api-java-client-services/.github/workflows/generate.yaml@main
    needs: batch
    secrets: inherit
    # The size of the batch is implicitly decided by the hour of the day.
    # For example, a job starting at "1:30" uses the chunk at the index 1 in the array.
    # If you manually invoke the workflow other hours than 0:00 - 2:59 and the array's length is 3,
    # this job is skipped because there's no element at the index in the array.
    if: ${{!!fromJson(needs.batch.outputs.services).batches[fromJson(needs.batch.outputs.services).hour]}}
    with: 
      services: ${{toJson(fromJson(needs.batch.outputs.services).batches[fromJson(needs.batch.outputs.services).hour])}}