fix: raise a clear error for empty inputs in retrieval and answer evaluators #773

	name: CodeQL

	on:
	# Skip runs that do not touch Python code
	push:
	branches: [main]
	paths:
	- "*/.py"
	- ".github/workflows/codeql.yml"
	pull_request:
	branches: [main]
	paths:
	- "*/.py"
	- ".github/workflows/codeql.yml"
	workflow_dispatch:

	permissions:
	contents: read

	# Cancel a superseded run for the same ref (e.g. a force-push to a PR) so we
	# don't burn CI minutes analyzing commits that are already stale.
	concurrency:
	group: codeql-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	analyze:
	name: Analyze (${{ matrix.language }})
	runs-on: ubuntu-latest
	timeout-minutes: 360
	permissions:
	# Required to upload code-scanning results to the Security tab.
	security-events: write
	# Required by codeql-action to read the workflow/CI config.
	actions: read
	contents: read

	strategy:
	fail-fast: false
	matrix:
	include:
	# Haystack is a Python project; Python is interpreted, so no build is
	# needed. Add `javascript-typescript` here if the docs-website JS code
	# should also be scanned.
	- language: python
	build-mode: none

	steps:
	- name: Checkout
	uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
	with:
	persist-credentials: false

	- name: Initialize CodeQL
	uses: github/codeql-action/init@e4fba868fa4b1b91e1fdab776edc8cfbe6e9fb81 # v4.37.3
	with:
	languages: ${{ matrix.language }}
	build-mode: ${{ matrix.build-mode }}

	- name: Perform CodeQL Analysis
	uses: github/codeql-action/analyze@e4fba868fa4b1b91e1fdab776edc8cfbe6e9fb81 # v4.37.3
	with:
	category: "/language:${{ matrix.language }}"

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