Can not use a list for Conanfile.default_options

To help us debug your issue please explain:

• I’ve read the CONTRIBUTING guide.
• I’ve specified the Conan version, operating system version and any tool that can be relevant.
• I’ve explained the steps to reproduce the error or the motivation/use case of the question/suggestion.

version 1.0.2

from conans import ConanFile, CMake, tools


class FooConan(ConanFile):
    name = "Foo"
    version = "1.0"
    license = "<Put the package license here>"
    url = "<Package recipe repository url here, for issues about the package>"
    description = "<Description of Foo here>"
    settings = "os", "compiler", "build_type", "arch"
    options = {"shared": [True, False]}
    default_options = ["shared=False"]

Results in an error (and not the most helpful of errors, either):

david@balrog:~$ conan install .
ERROR: /home/david/conanfile.py: Error while initializing options. too many values to unpack (expected 2)
david@balrog:~$ 

The problem lies on line 150 of conans/model/options.py where you check if the default options are type tuple but ignore type list. When that if-statement resolves as false, you jump down to the for-loop on line 158 which assumes it is a key-value pair. I would change line 150 to if isinstance(values, tuple) or isinstance(values, list).

[DavidZemon]

Nope, that’ll do it. Thanks for your help again

[memsharded]

Yes, in your case due to the logic of your options, I think that is the cleanest approach.

So I’d say that we could close this issue now, or do you have any further question? Thanks!