source_type is not assigned, regardless of virtual environment

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

• OS version and name: Fedora 31
• Poetry version: 1.1.0a1

Issue

Summary

Inside of a conda environment or a virtualenv, packages are discovered, but are not assigned a source_type attribute.

To reproduce the issue with conda:

1. Create a new conda environment, for example conda create --name poetry-fail-env python=3.7. Note I’m using the most recent release of conda which is 4.8.3
2. Activate the environment, conda activate poetry-fail-env
3. Make the poetry project poetry new poetry-fail-proj
4. Inside poetry-fail-proj run poetry install

Note that already packages are being updated despite being the most recent version:

Updating dependencies
Resolving dependencies... (0.2s)

Writing lock file


Package operations: 0 installs, 11 updates, 0 removals

  - Updating zipp (3.1.0 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 3.1.0)
  - Updating importlib-metadata (1.6.0 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 1.6.0)
  - Updating pyparsing (2.4.7 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 2.4.7)
  - Updating six (1.14.0 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 1.14.0)
  - Updating attrs (19.3.0 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 19.3.0)
  - Updating more-itertools (8.2.0 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 8.2.0)
  - Updating packaging (20.3 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 20.3)
  - Updating pluggy (0.13.1 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 0.13.1)
  - Updating py (1.8.1 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 1.8.1)
  - Updating wcwidth (0.1.9 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 0.1.9)
  - Updating pytest (5.4.1 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 5.4.1)
  - Installing poetry-fail-proj (0.1.0)

1. Run poetry update --dry-run

The packages are still marked for update:

Updating dependencies
Resolving dependencies... (0.2s)


Package operations: 0 installs, 11 updates, 0 removals, 2 skipped

  - Updating zipp (3.1.0 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 3.1.0)
  - Updating importlib-metadata (1.6.0 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 1.6.0)
  - Updating pyparsing (2.4.7 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 2.4.7)
  - Updating six (1.14.0 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 1.14.0)
  - Skipping atomicwrites (1.3.0) Not needed for the current environment
  - Updating attrs (19.3.0 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 19.3.0)
  - Skipping colorama (0.4.3) Not needed for the current environment
  - Updating more-itertools (8.2.0 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 8.2.0)
  - Updating packaging (20.3 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 20.3)
  - Updating pluggy (0.13.1 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 0.13.1)
  - Updating py (1.8.1 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 1.8.1)
  - Updating wcwidth (0.1.9 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 0.1.9)
  - Updating pytest (5.4.1 /home/sean/.conda/envs/poetry-fail/lib/python3.7/site-packages -> 5.4.1)

Poetry debug info:

Poetry
Version: 1.1.0a1
Python:  3.7.6

Virtualenv
Python:         3.7.6
Implementation: CPython
Path:           /home/sean/.conda/envs/poetry-fail
Valid:          True

System
Platform: linux
OS:       posix
Python:   /home/sean/.conda/envs/poetry-fail

To reproduce the issue with virtualenv:

Same process as conda but use virtualenv instead.

1. poetry install

Installing dependencies from lock file


Package operations: 11 installs, 0 updates, 0 removals

  - Installing zipp (3.1.0)
  - Installing importlib-metadata (1.6.0)
  - Installing pyparsing (2.4.7)
  - Installing six (1.14.0)
  - Installing attrs (19.3.0)
  - Installing more-itertools (8.2.0)
  - Installing packaging (20.3)
  - Installing pluggy (0.13.1)
  - Installing py (1.8.1)
  - Installing wcwidth (0.1.9)
  - Installing pytest (5.4.1)
  - Installing poetry-fail-proj (0.1.0)

1. poetry update --dry run

Updating dependencies
Resolving dependencies... (0.6s)


Package operations: 0 installs, 11 updates, 0 removals, 2 skipped

  - Updating zipp (3.1.0 /home/sean/.virtualenvs/poetry-test/lib/python3.7/site-packages -> 3.1.0)
  - Updating importlib-metadata (1.6.0 /home/sean/.virtualenvs/poetry-test/lib/python3.7/site-packages -> 1.6.0)
  - Updating pyparsing (2.4.7 /home/sean/.virtualenvs/poetry-test/lib/python3.7/site-packages -> 2.4.7)
  - Updating six (1.14.0 /home/sean/.virtualenvs/poetry-test/lib/python3.7/site-packages -> 1.14.0)
  - Skipping atomicwrites (1.3.0) Not needed for the current environment
  - Updating attrs (19.3.0 /home/sean/.virtualenvs/poetry-test/lib/python3.7/site-packages -> 19.3.0)
  - Skipping colorama (0.4.3) Not needed for the current environment
  - Updating more-itertools (8.2.0 /home/sean/.virtualenvs/poetry-test/lib/python3.7/site-packages -> 8.2.0)
  - Updating packaging (20.3 /home/sean/.virtualenvs/poetry-test/lib/python3.7/site-packages -> 20.3)
  - Updating pluggy (0.13.1 /home/sean/.virtualenvs/poetry-test/lib/python3.7/site-packages -> 0.13.1)
  - Updating py (1.8.1 /home/sean/.virtualenvs/poetry-test/lib/python3.7/site-packages -> 1.8.1)
  - Updating wcwidth (0.1.9 /home/sean/.virtualenvs/poetry-test/lib/python3.7/site-packages -> 0.1.9)
  - Updating pytest (5.4.1 /home/sean/.virtualenvs/poetry-test/lib/python3.7/site-packages -> 5.4.1)

Poetry debug info:

Poetry
Version: 1.1.0a1
Python:  3.7.6

Virtualenv
Python:         3.7.6
Implementation: CPython
Path:           /home/sean/.virtualenvs/poetry-test
Valid:          True

System
Platform: linux
OS:       posix
Python:   /usr

Investigation

Digging through the code, I found these line was triggering the updates:

                    elif package.source_type != pkg.source_type:
                        operations.append(Update(pkg, package))

where package.source_type is an empty string, but pkg.source_type is directory.

I’m not sure why the solver never assigns a value to source_type, but am happy to debug further asynchronously or via a video chat.

Unlike #1612, reverting to poetry 1.0.0 does not solve this problem.

[Seanny123]

For my own reference, this is not resolved in the 1.0.9

[Seanny123]

Fully resolved in Poetry 1.1.0!