pip-grep does not match local packages

[chadwhitacre]

Reticketing from gratipay/inside.gratipay.com#612 (comment) ...

Steps

1. cd vendor/pip-pop/
2. echo ./foo.zip > requirements.txt
3. ./pip-grep requirements.txt foo

Expected

"Package foo found!"

Actual

"Not found."

(Well, the actual actual is #298. ;-)

[kennethreitz]

This is an intentional design decision. You can't tell anything about something like a zip-file without opening and inspecting it.

[chadwhitacre]

What does pip-grep do with non-zip-files? Does it hit the network to get more information about them? If it's willing to hit the network, why isn't it willing to peak inside local files?

Barring that, any suggested workarounds short of forking the buildpack?

[kennethreitz]

Hmm, I'm not sure. I feel like zipfiles (and any local files, actually) is outside the scope of (automatic installation of system sub-deps / uninstallation of no-longer-listed packages). This is intended for augmenting pip's management of pypi-index-style package distributions.