[Bug 1290847] Re: pyvenv fails due to mising ensurepip module

[Matthias Klose]

we do not want to include all the pre-packaged python modules in the
wheel files, python-pip, setuptools, distlib, python-six, python-
requests, etc ...

so what we want to do:

 - if pyvenv3 is called with --system-site-packages, then don't require ensurepip at all,
   but try to import the system python3-pip and fail with an import error if it fails,
   pointing the user to install python3-pip

- when called without --system-site-packages:
  provide a wheel package/something which is built from the system supplied
  python-pip, setuptools, distlib, ... packages and then used in the venv. Maybe
  use rewheel for this, but in any case build this in a separate source.


** Also affects: python3-defaults (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1290847

Title:
  pyvenv fails due to mising ensurepip module

Status in “python3-defaults” package in Ubuntu:
  Confirmed
Status in “python3.4” package in Ubuntu:
  Confirmed
Status in “python3.4” package in Debian:
  New

Bug description:
  Hello,

  I noticed the following

  # fails
  python3.4 -m venv --clear python-venv
  Error: Command '['.../external/python-venv/bin/python3.4', '-Im', 'ensurepip', '--upgrade', '--default-pip']' returned non-zero exit status 1

  # works, but no pip
  python3.4 -m venv --clear --without-pip python-venv

  Thank you

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