feat: add self-validating workflow gate jobs #1290

	name: PR Build
	on:
	workflow_dispatch:
	pull_request:
	branches:
	- main

	jobs:
	build:
	name: Gradle Build
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- uses: actions/setup-java@v4
	with:
	java-version: 11
	distribution: corretto

	- name: Setup Gradle
	uses: gradle/actions/setup-gradle@v3

	- name: Build with Gradle
	run: ./gradlew build

	all-pr-checks-pass:
	runs-on: ubuntu-latest
	needs: [build]
	if: always()
	steps:
	- name: Checkout to get workflow file
	uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 #5.0.0

	- name: Check all jobs succeeded and none missing
	run: \|
	# Check if all needed jobs succeeded
	results='${{ toJSON(needs) }}'
	if echo "$results" \| jq -r '.[] \| .result' \| grep -v success; then
	echo "Some jobs failed"
	exit 1
	fi

	# Extract all job names from workflow (excluding this gate job)
	all_jobs=$(yq eval '.jobs \| keys \| .[]' .github/workflows/pr-build.yml \| grep -v "all-pr-checks-pass" \| sort)

	# Extract job names from needs array
	needed_jobs='${{ toJSON(needs) }}'
	needs_list=$(echo "$needed_jobs" \| jq -r 'keys[]' \| sort)

	# Check if any jobs are missing from needs
	missing_jobs=$(comm -23 <(echo "$all_jobs") <(echo "$needs_list"))
	if [ -n "$missing_jobs" ]; then
	echo "ERROR: Jobs missing from needs array in all-pr-checks-pass:"
	echo "$missing_jobs"
	echo "Please add these jobs to the needs array of all-pr-checks-pass"
	exit 1
	fi

	echo "All checks passed and no jobs missing from gate!"

Provide feedback