Objective

A repository at /home/interview/repo contains a multi-component application with infrastructure code in /infra and documentation in /docs. The repository has the upload-artifact action available locally at .github/actions/upload-artifact.

Task

Complete the workflow at .github/workflows/infra-check.yml so it only runs when files under the /infra directory change. The workflow should trigger on push events with a path filter, use the container image node:20-slim, run ./validate-infra.sh, and upload validation-result.txt as an artifact named validation-report using ./.github/actions/upload-artifact.

File Path

• Workflow: /home/interview/repo/.github/workflows/infra-check.yml
• Validation script: /home/interview/repo/validate-infra.sh

name: Infrastructure Validation

on:
  push:
    paths:
      - 'infra/**'

jobs:
  validate:
    runs-on: ubuntu-latest
    container:
      image: node:20-slim

    steps:
      - uses: actions/checkout@v4

      - name: Run infrastructure validation
        run: ./validate-infra.sh

      - name: Upload validation report
        uses: ./.github/actions/upload-artifact
        with:
          name: validation-report
          path: validation-result.txt

Explanation

Step 1: Path Filter

on:
  push:
    paths:
      - 'infra/**'

The paths filter tells GitHub Actions to only run this workflow when files matching the pattern are changed in the push. infra/** matches any file inside the infra directory (including subdirectories). Pushes that only change files in /docs or other directories won't trigger this workflow.

Step 2: Container and Validation

container:
  image: node:20-slim

steps:
  - uses: actions/checkout@v4

  - name: Run infrastructure validation
    run: ./validate-infra.sh

  - name: Upload validation report
    uses: ./.github/actions/upload-artifact
    with:
      name: validation-report
      path: validation-result.txt

The job runs inside a node:20-slim container. After checkout, it runs the validation script which produces validation-result.txt, then uploads it as an artifact for review.