rerun-test.yml

name: Test retry

on:
  push:
  workflow_dispatch:
    inputs:
      maxAttempts:
        description: "How many times to rerun the workflow in case of a failure"
        required: true
        type: string
        default: "3"

env:
  # You can hardcode this instead of passing it in from inputs
  maxAttempts: 3

jobs:
  randomly-failing-job:
    runs-on: ubuntu-latest
    outputs:
      nextAttempt: ${{ steps.set_output_variables.outputs.nextAttempt }}
      maxAttempts: ${{ steps.set_output_variables.outputs.maxAttempts }}
    steps:
      # - name: echo
      #   run: echo ${{ github.event.inputs.maxAttempts }}
      - name: Set output variables
        id: set_output_variables
        # if: github.event_name == 'workflow_dispatch'
        shell: pwsh
        run: |
          echo "GITHUB_RUN_ATTEMPT = $env:GITHUB_RUN_ATTEMPT"
          echo "maxAttempts = [int]$env:maxAttempts"
          $attempt = [int]$env:GITHUB_RUN_ATTEMPT
          echo "attempt = $attempt"
          $maxAttempts = [int]$env:maxAttempts
          $nextAttempt = $attempt + 1
          echo "nextAttempt=$nextAttempt"
          echo "maxAttempts=$maxAttempts"
          echo "nextAttempt=$nextAttempt" >> $env:GITHUB_OUTPUT
          echo "maxAttempts=$maxAttempts" >> $env:GITHUB_OUTPUT
      - name: echo
        run: echo ${{ steps.set_output_variables.outputs.nextAttempt }} ${{ steps.set_output_variables.outputs.maxAttempts }}
      - name: echo
        run: echo $GITHUB_OUTPUT
      # - name: Step that fails randomly
      #   run: |
      #     exit $((RANDOM % 2))
      - name: Step that fails always
        run: |
          exit 1

  trigger_rerun:
    name: Trigger rerun of ${{ github.run_id }}
    if: failure() && ( needs.randomly-failing-job.outputs.nextAttempt <= needs.randomly-failing-job.outputs.maxAttempts ) # exeutes job if ancestor job have failed and maxAttempts has not been exceeded
    needs: randomly-failing-job
    runs-on: ubuntu-latest
    env:
      attempt: ${{ needs.randomly-failing-job.outputs.nextAttempt }}
    steps:
      - name: echo
        run: echo ${{ needs.randomly-failing-job.outputs.nextAttempt }} ${{ needs.randomly-failing-job.outputs.maxAttempts }}
      - name: "Trigger attempt ${{ needs.randomly-failing-job.outputs.nextAttempt }} of 'Test retry' workflow"
        shell: pwsh
        env:
          # GITHUB_TOKEN with actions: write will NOT work
          # PAT Token must have workflow scope
          GH_CLI_TOKEN: ${{ secrets.RERUN_TOKEN_CLASSIC }}
        run: |
          echo "Running gh auth login..."
          $env:GH_CLI_TOKEN | gh auth login --with-token
          if(!$?) { exit 1 }
          echo "Triggering attempt ${{ needs.randomly-failing-job.outputs.nextAttempt }} of 'Test retry' workflow"
          echo "
          gh workflow run rerun.yml
            --raw-field runId=$env:GITHUB_RUN_ID
            --repo $env:GITHUB_REPOSITORY
          "
          gh workflow run rerun.yml `
            --raw-field runId=$env:GITHUB_RUN_ID `
            --repo $env:GITHUB_REPOSITORY
          if(!$?) { exit 1 }