MRG: improve downsampling behavior on `KmerMinHash`; fix `RevIndex::gather` bug around `scaled`. #5749

	name: "Dev env instructions"
	on:
	pull_request:
	push:
	branches: [latest]
	concurrency:
	group: ${{ github.ref }}
	cancel-in-progress: ${{ github.ref != 'refs/heads/latest' }}
	jobs:
	nix:
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-latest, macos-14]
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: Install Nix
	uses: DeterminateSystems/nix-installer-action@v14
	- name: Run the Magic Nix Cache
	uses: DeterminateSystems/magic-nix-cache-action@v8

	- run: nix run .# -- --version

	- run: nix develop --command bash -c "tox -e py310"

	pixi:
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-latest, macos-14]
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: set up pixi
	uses: prefix-dev/[email protected]
	with:
	pixi-version: v0.26.1
	cache: true
	frozen: true

	- name: run tests for 3.10
	shell: pixi run bash {0}
	run: tox -e py310

	mamba:
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-latest, macos-14]
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: cache conda
	uses: actions/cache@v4
	env:
	CACHE_NUMBER: 0
	with:
	path: ~/conda_pkgs_dir
	key:
	${{ runner.os }}-conda-${{ env.CACHE_NUMBER }}-${{ hashFiles('environment.yml') }}

	- name: setup conda
	uses: conda-incubator/setup-miniconda@a4260408e20b96e80095f42ff7f1a15b27dd94ca
	with:
	python-version: "3.10"
	miniforge-version: latest
	environment-file: dev.yml
	activate-environment: sourmash_dev
	auto-activate-base: false

	- name: run tests for 3.10
	shell: bash -l {0}
	run: tox -e py310

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