How should Extra-index-url be treated in Pipfile?

[arruda]

Will it be just another entry in [[source]] with a boolean extra=True?
Or pipfile will consider extra-index-url to be just like any other source? if so, anything that uses Pipfile will have to do some try/excepts to see if the current package is present in each of the listed sources (because some of them can be a extra, and contain just some specific listed packages)

[dstufft]

pip doesn't treat --extra-index-url differently from --index-url, the only difference is --index-url overwrites the default and --extra-index-url adds an additional one, but beyond that they are exactly the same. So Pipfile will treat it just like any other source.

[arruda]

Thank @dstufft I was thinking in a solution to a problem in pipenv, but was unsure if this was going to be the correct behavior used in Pipfile. Thanks for the fast response 👍 🎉