install --deps-only

[unhammer]

The workaround to installing deps only seems to be pip install -U -r requirements.txt -e ., but then you still have to pip uninstall -y foo and sed -i '/foo/d' easy-install.pth afterwards.

It'd be nice with an option to install deps only, like pip install --deps-only -U .

[unhammer]

This'd work well in concert with a solution to #536 in order to be able to upgrade-install deps, but ignore-install the current project.

[rbtcollins]

bikeshed --only-dependencies (which cabal uses)

[dstufft]

Closing this, I don't think that the use case as I understand it warrants adding an option to pip. You might try using ```pip-compile`` from pip-tools to manage your dependencies instead.

[pradyunsg]

Adding a cross reference to #11440