pip-compile reveals default --config=pyproject.toml option in header

[atugushev]

There is a bug with pip 6.14.0. I just use pip-compile --allow-unsafe --generate-hashes --output-file=requirements/test.txt --resolver=backtracking --strip-extras requirements/test.in
but now it adds --config=pyproject.toml even there is no configuration in pyproject.toml
When running pip-compile click context has no src_files, so select_config_file returns pyproject.toml, but after compiling click context has src_files as requirements/test.in, so select_config_file returns None and so pyproject.toml != None

Making --config is_eager=False works

Originally posted by @q0w in #1893 (comment)

[q0w]

#1902 i've added steps to replicate.
So src_files is resolved after --config. Maybe src_files should be resolved first

[atugushev]

I think we could update this:

pip-tools/piptools/utils.py

Lines 365 to 368 in 4b9cc32

	if option_long_name == "--config":
	default_config = select_config_file(click_ctx.params.get("src_files", ()))
	if value == default_config:
	continue

to something like:

if option_long_name == "--config":
    default_configs = {'pyproject.toml', '.pip-tools.toml'}
    if value in default_config:
        continue

What do you think?

[atugushev]

#1902 i've added steps to replicate.

Ah, sorry. You might close this as duplicate then.

[q0w]

if option_long_name == "--config":
    default_configs = {'pyproject.toml', '.pip-tools.toml'}
    if value in default_config:
        continue

It would not work, value is None here
upd: I guess it works

[q0w]

oh no, it does not work, only with is_eager = False
@atugushev