Documentation should mention variable expansion works only in [[source]] entries

At least on Windows, in a file string, environment variables are not being expanded.

_python-ldap = {platform_system = "== 'Windows'", file = "%USERPROFILE%/Downloads/python_ldap-3.1.0-cp36-cp36m-win_amd64.whl"}

WARNING: Invalid requirement, parse error at “‘%USERPRO’” ABORTING INSTALL… You will have to reinstall any packages that failed to install.

The same thing happens for ${USERPROFILE} and $USERPROFILE. Python 3.6.5 Pipenv 2018.05.18

[OrangeDog]

there’s nothing to fix

The documentation should make it clear that they only work in [[source]]. The whole section may even be redundant to the “Injecting credentials into Pipfiles via environment variables” section.

[uranusjr]

The implementation uses expandvars, which (according to the documentation) accepts %...% form on Windows. But yeah ${...} is probably better if you want to do this on multiple platforms.

Reopening (and changing the title) to track the doc amendment.