[Distutils] [Python-Dev] At least one package management tool for 2.7

[Carl Meyer]

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Hi Darren,

Darren Dale wrote:
> Amusing. Seriously though, how does pip determine the dependencies if
> it is calling setup.py with arguments that prevent Setuptools from
> resolving the dependencies? pip --help doesn't indicate a --no-deps
> option, it sounds like pip is passing that option to setup.py under
> the hood.

Pip asks setuptools not to install dependencies because pip has already
handled them. (Pip does some things differently from easy_install; for
instance it downloads all dependencies and runs "setup.py egg_info" on
each before actually installing any of them, to reduce the chances that
a broken dependency leaves your system in an inconsistent state). Pip
only shells out to setuptools for the actual installation of each
individual package, once it has already resolved dependencies and
downloaded all of them.

Carl
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