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Lint

Fix Python 3.8/3.9 jobs on Ubuntu 26.04, pin actions, and add zizmor #2274

	name: Lint

	on:
	push:
	branches: [main]
	pull_request:
	workflow_dispatch:

	permissions:
	contents: read

	jobs:
	lint:
	runs-on: ubuntu-slim

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

	- uses: actions/setup-python@6d4fd22b20465ccc0f7354476588e8df7c9ca0e0 # v7.1.0
	with:
	python-version: "3.x"

	- uses: pre-commit/action@2c7b3805fd2a0fd8c1884dcaebf91fc102a13ecd # v3.0.1

	# Check that all `actions/checkout` in CI jobs have `persist-credentials: false`.
	check-no-persist-credentials:
	runs-on: ubuntu-slim

	env:
	GLOB: .github/workflows/*.@(yaml\|yml)

	steps:
	- uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
	with:
	persist-credentials: false
	sparse-checkout: ".github/workflows"
	- name: List workflows to be scanned
	run: \|
	shopt -s extglob
	printf '%s\n' $GLOB # Pathname expansion in $GLOB intended.
	- name: Scan workflows
	run: \|
	shopt -s extglob
	yq '.jobs.*.steps[]
	\| select(.uses == "actions/checkout@*" and .with.["persist-credentials"]? != false)
	\| {"file": filename, "line": line, "name": (.name // .uses)}
	\| .file + ":" + (.line \| tostring) + ": " + .name
	' -- $GLOB >query-output.txt # Pathname expansion in $GLOB intended.
	cat query-output.txt
	test -z "$(<query-output.txt)" # Report failure if we found anything.