AssertionError: Egg-link […] does not match installed location when symlinks added to venv path

[schlichtanders]

pip-19.2.2

I am opening a new ticket, because I cannot add remarks to any of the following related old issues (#640, #640)

To repeat, the problem is that pip install --upgrade ... or pip uninstall ... have a check for the path in *.egg-link files which does not handle relative files.

To add, setuptools explains that relative egg-files are valid https://setuptools.readthedocs.io/en/latest/formats.html#egg-links

As of setuptools 0.6c6, the path may be specified as a platform-independent (i.e. /-separated) 
relative path from the directory containing the .egg-link file

Here a recent error which I still get after updating pip to pip-19.2.2

ERROR: Exception:
Traceback (most recent call last):
  File "/home/NQ10014537/tmp/pdi_products/virtualenv/lib64/python3.6/site-packages/pip/_internal/cli/base_command.py", line 188, in main
    status = self.run(options, args)
  File "/home/NQ10014537/tmp/pdi_products/virtualenv/lib64/python3.6/site-packages/pip/_internal/commands/install.py", line 407, in run
    use_user_site=options.use_user_site,
  File "/home/NQ10014537/tmp/pdi_products/virtualenv/lib64/python3.6/site-packages/pip/_internal/req/__init__.py", line 51, in install_given_reqs
    auto_confirm=True
  File "/home/NQ10014537/tmp/pdi_products/virtualenv/lib64/python3.6/site-packages/pip/_internal/req/req_install.py", line 830, in uninstall
    uninstalled_pathset = UninstallPathSet.from_dist(dist)
  File "/home/NQ10014537/tmp/pdi_products/virtualenv/lib64/python3.6/site-packages/pip/_internal/req/req_uninstall.py", line 538, in from_dist
    '(at %s)' % (link_pointer, dist.project_name, dist.location)
AssertionError: Egg-link ../../../src/MYPACKAGENAME does not match installed location of MYPACKAGENAME (at /absolute/path/to/MYPACKAGENAME)

[pradyunsg]

Is this with a relocatable virtualenv?

[schlichtanders]

this is with python -m venv plus manual rewriting of absolute paths to relative ones

[pradyunsg]

Could you provide a set of reproducible steps that expose this issue? Also, could you also state which check in the un-installation logic is the check-that-does-not-handle-relative-files is?

[coyoteecd]

For what is worth, I got the same problem on Windows after running pip install -e for an open source package (cfn-python-lint) with the code checked out in a mapped/subst-ed drive.

I have drive K: subst-ed to C:\Code, and I installed with pip install -e from K:\sws\cfn-python-lint.
When I try to uninstall, I get:

ERROR: Exception:
Traceback (most recent call last):
  File "c:\program files (x86)\python38-32\lib\site-packages\pip\_internal\cli\base_command.py", line 188, in main
    status = self.run(options, args)
  File "c:\program files (x86)\python38-32\lib\site-packages\pip\_internal\commands\uninstall.py", line 74, in run
    uninstall_pathset = req.uninstall(
  File "c:\program files (x86)\python38-32\lib\site-packages\pip\_internal\req\req_install.py", line 830, in uninstall
    uninstalled_pathset = UninstallPathSet.from_dist(dist)
  File "c:\program files (x86)\python38-32\lib\site-packages\pip\_internal\req\req_uninstall.py", line 536, in from_dist
    assert (link_pointer == dist.location), (
AssertionError: Egg-link k:\sws\cfn-python-lint\src does not match installed location of cfn-lint (at c:\code\sws\cfn-python-lint\src)

[no-response]

This issue has been automatically closed because there has been no response to our request for more information from the original author. With only the information that is currently in the issue, we don't have enough information to take action. Please reach out if you have or find the answers we need so that we can investigate further.