Tweak callback evaluation order of eagerness options

[kdeldycke]

Eager parameters are evaluated in the order as they were provided on the command line by the user as explained in: https://click.palletsprojects.com/en/8.0.x/advanced/#callback-evaluation-order

This means a call to:

• --no-color --version will output a plain, uncoloured version string, while
• --version --no-color will output a coloured string.

This is highlighted by a test at:

click-extra/click_extra/tests/test_colorize.py

Lines 318 to 346 in d589907

	@skip_windows_colors
	def test_color_option_precedence(invoke):
	"""--no-color has an effect on --version, if placed in the right order.
	Eager parameters are evaluated in the order as they were provided on the command
	line by the user as expleined in:
	https://click.palletsprojects.com/en/8.0.x/advanced/#callback-evaluation-order
	..todo:
	Maybe have the possibility to tweak CLI callback evaluation order so we can
	let the user to have the NO_COLOR env set to allow for color-less --version output.
	"""
	@click.command()
	@color_option()
	@version_option(version="2.1.9")
	def dummy_cli():
	click.echo(Style(fg="yellow")("It works!"))
	result = invoke(dummy_cli, "--no-color", "--version", "command1", color=True)
	assert result.exit_code == 0
	assert result.output == "dummy-cli, version 2.1.9\n"
	assert not result.stderr
	result = invoke(dummy_cli, "--version", "--no-color", "command1", color=True)
	assert result.exit_code == 0
	assert result.output == "\x1b[97mdummy-cli\x1b[0m, version \x1b[32m2.1.9\x1b[0m\n"
	assert not result.stderr

It could be great to have --no-color (and its NO_COLOR env var) be respected whatever its order.