Fix regression where package.source_reference is unset

[dan-hipschman]

Change

This fixes an issue that looks like it's a regression on the develop branch.

The problem occurs with packages from private repos:

# Assume private repo called pypi-local exists.
poetry add private-package
Creating virtualenv test1-b4L2acJf-py3.8 in /root/.cache/pypoetry/virtualenvs
Using version ^3.1.6 for private-package

Updating dependencies
Resolving dependencies... (11.5s)

Writing lock file


Package operations: 25 installs, 0 updates, 0 removals

  - Installing blahblah...
    [snip irrelevant text...]
  - Installing private-package (3.1.6)

  ValueError

  Repository "" does not exist.

  at /poetry/poetry/repositories/pool.py:40 in repository
       36|     def repository(self, name):  # type: (str) -> Repository
       37|         if name in self._lookup:
       38|             return self._repositories[self._lookup[name]]
       39|
    >  40|         raise ValueError('Repository "{}" does not exist.'.format(name))
       41|
       42|     def add_repository(
       43|         self, repository, default=False, secondary=False
       44|     ):  # type: (Repository, bool, bool) -> Pool

It's caused by source_reference not being set in the lock file.

In lockfile on master:

[package.source]
reference = "pypi-local"
url = "https://xyz.jfrog.io/xyz/api/pypi/pip/simple"

In lockfile on develop:

[package.source]
reference = ""
url = "https://xyz.jfrog.io/xyz/api/pypi/pip/simple"

It was removed in this change. This PR just adds it back with a test.

Pull Request Check List

Resolves: I didn't file an issue for this because it's only on the develop branch, not master.

• Added tests for changed code.
• Updated documentation for changed code. (bug fix)

[dan-hipschman]

It looks like the bug this PR addresses was fixed by #2484. I'll close this PR.

[github-actions]

This pull request has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.