Detect identical references in `extractAggregateFields` to allow `dis… #39

	name: ci
	on:
	push:
	pull_request:
	schedule:
	- cron: '0 3 * * 6' # 3am Saturday
	jobs:
	test:
	runs-on: ${{ matrix.os }}

	strategy:
	fail-fast: false
	matrix:
	os: [ubuntu-latest]
	ghc: ['9.6', '9.4', '9.2', '9.0', '8.10', '8.8']

	services:
	postgres:
	image: postgres:11
	env:
	POSTGRES_DB: postgres
	POSTGRES_PASSWORD: postgres
	POSTGRES_USER: postgres
	ports:
	- 5432:5432
	# Set health checks to wait until postgres has started
	options: >-
	--health-cmd pg_isready
	--health-interval 10s
	--health-timeout 5s
	--health-retries 5

	steps:
	- run: git config --global core.autocrlf false
	- uses: actions/checkout@v2
	- uses: haskell/actions/setup@v2
	id: setup-haskell
	with:
	ghc-version: ${{ matrix.ghc }}
	- run: cabal v2-freeze --enable-tests
	- uses: actions/cache@v2
	with:
	path: ${{ steps.setup-haskell.outputs.cabal-store }}
	key: ${{ runner.os }}-${{ matrix.ghc }}-${{ hashFiles('cabal.project.freeze') }}
	restore-keys: ${{ runner.os }}-${{ matrix.ghc }}-
	- uses: tomjaguarpaw/neil@tag-ac7e72e
	with:
	github-user: tomjaguarpaw
	branch: tag-ac7e72e
	env:
	POSTGRES_CONNSTRING: "user='postgres' dbname='postgres' password='postgres' host='localhost' port='5432'"

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