[Bug 1626258] Re: [SRU] AttributeError: 'Requirement' object has no attribute 'project_name'

[Louis Bouchard]

** Also affects: python-pip (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Changed in: python-pip (Ubuntu Xenial)
     Assignee: (unassigned) => Felipe Reyes (freyes)

** Changed in: python-pip (Ubuntu)
       Status: New => Invalid

** Changed in: python-pip (Ubuntu Xenial)
       Status: New => In Progress

** Changed in: python-pip (Ubuntu Xenial)
   Importance: Undecided => High

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Title:
  [SRU] AttributeError: 'Requirement' object has no attribute
  'project_name'

Status in python-pip package in Ubuntu:
  Invalid
Status in python-pip source package in Xenial:
  In Progress

Bug description:
  [impact]

  pip 8.1.1 (xenial) tries to access properties that were dropped from
  the Requirement class and when pip's code tries to access
  Requirement.project_name fails, this was fixed in 8.1.2.

  Any user trying to install a package that triggers the
  pkg_resources.VersionConflict exception during will get the error
  "AttributeError: 'Requirement' object has no attribute 'project_name'"

  [Test Case]

  # wget https://pypi.python.org/packages/49/6f/183063f01aae1e025cf0130772b55848750a2f3a89bfa11b385b35d7329d/requests-2.10.0.tar.gz
  # wget https://pypi.python.org/packages/2e/ad/e627446492cc374c284e82381215dcd9a0a87c4f6e90e9789afefe6da0ad/requests-2.11.1.tar.gz
  # pip install requests-2.10.0.tar.gz
  # pip install requests-2.11.1.tar.gz

  Expected result:

  pip installs requests 2.11.1

  Actual result:

  pip fails with the following exception

  root at pip-x:/home/ubuntu# pip install requests-2.11.1.tar.gz
  Processing ./requests-2.11.1.tar.gz
  Exception:
  Traceback (most recent call last):
    File "/usr/lib/python2.7/dist-packages/pip/basecommand.py", line 209, in main
      status = self.run(options, args)
    File "/usr/lib/python2.7/dist-packages/pip/commands/install.py", line 328, in run
      wb.build(autobuilding=True)
    File "/usr/lib/python2.7/dist-packages/pip/wheel.py", line 748, in build
      self.requirement_set.prepare_files(self.finder)
    File "/usr/lib/python2.7/dist-packages/pip/req/req_set.py", line 360, in prepare_files
      ignore_dependencies=self.ignore_dependencies))
    File "/usr/lib/python2.7/dist-packages/pip/req/req_set.py", line 600, in _prepare_file
      req_to_install.check_if_exists()
    File "/usr/lib/python2.7/dist-packages/pip/req/req_install.py", line 1011, in check_if_exists
      self.req.project_name
  AttributeError: 'Requirement' object has no attribute 'project_name'
  You are using pip version 8.1.1, however version 8.1.2 is available.
  You should consider upgrading via the 'pip install --upgrade pip' command.

  [Regression Potential]

  * None, this change is already part of 8.1.2, and most of the change
  is already part of the ubuntu package, there is just one last place
  where the code is accessing Requirement.project_name

  [Other info]

  From 8e236dd6a09bd2f70f9d4fc886da8c354d4c58f2 Mon Sep 17 00:00:00 2001
  From: Donald Stufft <donald at stufft.io>
  Date: Wed, 11 Nov 2015 18:51:46 -0500
  Subject: [PATCH] Update to use the Requirement class from packaging
  https://github.com/pypa/pip/commit/8e236dd6a09bd2f70f9d4fc886da8c354d4c58f2

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