• [ x] I am on the latest Poetry version.
• [ x] I have searched the issues of this repo and believe that this is not a duplicate.
• [x ] If an exception occurs when executing a command, I executed it again in debug mode (-vvv option).

• OS version and name: MacOs 10.15
• Poetry version: 1.1a3/b2

Issue

This issues was found trying to validate the change set presented in #2327. In 1.0.9 where the PR was inititated, the

Back tracking this issue, lead me to the InstalledRepository load method,

I have a test test up where my only dependency is a test git repo, I added the following to try and diagnose the problem.

        for entry in reversed(env.sys_path):
            print(entry, list(metadata.distributions(path=[entry])))
            for distribution in sorted(
                metadata.distributions(path=[entry]), key=lambda d: str(d._path),
            ):

The output is:

/Users/cahurst/code/test2/.venv/src/test-abc/src []
/Users/cahurst/code/test2/.venv/lib/python3.8/site-packages [<importlib.metadata.PathDistribution object at 0x109a84af0>, <importlib.metadata.PathDistribution object at 0x109a84a90>, <importlib.metadata.PathDistribution object at 0x109a84c70>, <importlib.metadata.PathDistribution object at 0x109a84dc0>, <importlib.metadata.PathDistribution object at 0x109a84c40>]
/Users/cahurst/.pyenv/versions/3.8.0/lib/python3.8/lib-dynload []
/Users/cahurst/.pyenv/versions/3.8.0/lib/python3.8 []
/Users/cahurst/.pyenv/versions/3.8.0/lib/python38.zip []
 []

My test repo is not returning any metadata distributions and during the next loop, the dist-info file is being detected and the package is being treated as a standard package and things try and get updated based on that.

Forcibly adding the following if condition to see if they is the root cause resolves the issue and pkg.source_type is being properly populated.

            for distribution in sorted(
                metadata.distributions(path=[entry]), key=lambda d: str(d._path),
            ):
                name = distribution.metadata["name"]
                path = Path(str(distribution._path))
                if name == "test-abc":
                    path = Path("/Users/cahurst/code/test2/.venv/src/test-abc/src")

Unfortunately, metadata.distributions is out of my knowledge base and I am unsure what should be changed here as I looked to try and see if something further in the chain might be wrong as well but this following gate fails unless that first entry is passed in and set.