the command line or environment or pants.ini files

but

--source

by itslef isn't an option, right?

but wait,

--source-source-roots

seems to be?

./pants options | grep -i source

can sometimes be a useful way to find the option you want

i alternately do things like

rg -F '--source-roots'

in the pants repo because all pants options are registered with

register('--source-roots', ...)

(did you figure this out?)

as far as I can tell right now, with this set of debug prints: https://github.com/pantsbuild/pants/pull/8045/commits/eeb1ce5159f07e516d749f6dc54cfb39db22e2d0

when I run

/pants test tests/python/pants_test/backend/graph_info/tasks:root

(my new test), there is an options type being passed to

SourceRootConfig

of type

OptionValueContainer

, and it's trying to insert the go source roots

'src/go/src': ('go',), 'src/main/go/src': ('go',)}

whereas if I run

./pants test tests/python/pants_test/core_tasks:roots

(the old test)

the constructor of

SourceRootConfig

gets an options value of

_FakeOptionValues

(I'm printing the same variable each time)

and that correctly adds the source root

{'fakeroot': ('lang1', 'lang2')}

, which is what the test should be mocking

I cannot figure out 1) why my new test is getting a different options type than my old test or 2) how I sould be correclty instantiating the source root in the new version of the test

options are computed from an OptionsBootsrapper