github-schema-validation.yml

name: '.github schema check'

on:
  workflow_dispatch:
  push:
    branches:
      - master
    paths:
      - '.github/dependabot.yml'
      - '.github/actions/*/action.yml'
      - '.github/workflows/*.yml'
  pull_request:
    paths:
      - '.github/dependabot.yml'
      - '.github/actions/*/action.yml'
      - '.github/workflows/*.yml'

jobs:
  github-schemas:
    runs-on: ubuntu-24.04
    steps:
      - name: Checkout
        uses: actions/checkout@v4.2.1
        with:
          fetch-depth: 1

      - name: '.github/dependabot.yml'
        if: ${{ hashFiles('.github/dependabot.yml') != '' }}
        uses: cardinalby/schema-validator-action@v3
        with:
          file: '.github/dependabot.yml'
          schema: 'https://json.schemastore.org/dependabot-2.0.json'
          mode: 'lax'  # We really just want allowUnusedKeywords: true

      - name: '.github/actions'
        if: ${{ hashFiles('.github/actions/*/action.yml') != '' }}
        uses: cardinalby/schema-validator-action@v3
        with:
          file: '.github/actions/*/action.yml'
          schema: 'https://json.schemastore.org/github-action.json'

      - name: '.github/workflows'
        if: ${{ hashFiles('.github/workflows/*.yml') != '' }}
        uses: cardinalby/schema-validator-action@v3
        with:
          file: '.github/workflows/*.yml'
          schema: 'https://json.schemastore.org/github-workflow.json'
          mode: 'lax'  # https://github.com/SchemaStore/schemastore/issues/3102