Add executable generation #9

	name: WeasyPrint’s exe generation
	on: [push]

	jobs:
	generate:
	name: ${{ matrix.os }}
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: ['ubuntu-20.04', 'macos-11', 'windows-2019']
	steps:
	- uses: actions/checkout@v3
	- uses: actions/setup-python@v4
	with:
	python-version: '3.11'
	- name: Use absolute imports
	if: matrix.os == 'ubuntu-20.04'
	run: \|
	sed -i 's/^from \. /from weasyprint /' weasyprint/__main__.py
	sed -i 's/^from \./from weasyprint\./' weasyprint/__main__.py
	- name: Use absolute imports and install Pango (MacOS)
	if: matrix.os == 'macos-11'
	run: \|
	sed -i '' 's/^from \. /from weasyprint /' weasyprint/__main__.py
	sed -i '' 's/^from \./from weasyprint\./' weasyprint/__main__.py
	rm /usr/local/bin/2to3
	brew install pango
	- name: Use absolute imports and install Pango (Windows)
	if: matrix.os == 'windows-2019'
	run: \|
	(Get-Content weasyprint/__main__.py).replace('^from \. ', 'from weasyprint ').replace('^from \.', 'from weasyprint\.') \| Set-Content weasyprint/__main__.py
	C:\msys64\usr\bin\bash -lc 'pacman -S mingw-w64-x86_64-pango --noconfirm'
	rm C:\msys64\mingw64\bin\python.exe
	- name: Install requirements
	run: python -m pip install . pyinstaller
	- name: Generate executable
	run: python -m PyInstaller weasyprint/__main__.py -n weasyprint -F
	- name: Test executable
	run: dist/weasyprint --help
	- name: Store executable
	uses: actions/upload-artifact@v3
	with:
	name: weasyprint
	path: \|
	dist/weasyprint
	README.rst
	LICENSE

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