Backport PR #28818 on branch v3.9.x (Resolve configdir so that it's not a symlink when is_dir() is called) #24859

	---
	name: Linting
	on: [pull_request]

	permissions:
	contents: read
	checks: write
	pull-requests: write

	jobs:
	flake8:
	name: flake8
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: Set up Python 3
	uses: actions/setup-python@v5
	with:
	python-version: 3.9

	- name: Install flake8
	run: pip3 install -r requirements/testing/flake8.txt

	- name: Set up reviewdog
	uses: reviewdog/action-setup@v1

	- name: Run flake8
	env:
	REVIEWDOG_GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	run: \|
	set -o pipefail
	flake8 --docstring-convention=all \| \
	reviewdog -f=pep8 -name=flake8 \
	-tee -reporter=github-check -filter-mode nofilter
	mypy:
	name: mypy
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: Set up Python 3
	uses: actions/setup-python@v5
	with:
	python-version: 3.9

	- name: Install mypy
	run: pip3 install -r requirements/testing/mypy.txt -r requirements/testing/all.txt

	- name: Set up reviewdog
	uses: reviewdog/action-setup@v1

	- name: Run mypy
	env:
	REVIEWDOG_GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}
	run: \|
	set -o pipefail
	mypy --config pyproject.toml \| \
	reviewdog -f=mypy -name=mypy \
	-tee -reporter=github-check -filter-mode nofilter


	eslint:
	name: eslint
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: eslint
	uses: reviewdog/action-eslint@v1
	with:
	filter_mode: nofilter
	github_token: ${{ secrets.GITHUB_TOKEN }}
	reporter: github-check
	workdir: 'lib/matplotlib/backends/web_backend/'

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