bug: poetry lock contains packaging module - pyproject.toml does not

[mjsqu]

https://github.com/meltano/sdk/blame/ba8c43c40957a599374ad32697a391b171610e04/singer_sdk/plugin_base.py#L15

[mjsqu]

A colleague has just been using the latest version of the SDK and installing from the pyproject.toml and then running with meltano fails with packaging not found.

[s7clarke10]

Here is a bit more detail around the issue running with the latest SDK.

meltano --log-level=debug invoke tap-rest-api-msdk--MDR --discover
Traceback (most recent call last):
  File "/home/my_user/meltano-projects/salesforce_pot/.meltano/extractors/tap-rest-api-msdk/venv/bin/tap-rest-api-msdk", line 5, in <module>
    from tap_rest_api_msdk.tap import TapRestApiMsdk
  File "/home/my_user/meltano-projects/salesforce_pot/.meltano/extractors/tap-rest-api-msdk/venv/lib64/python3.8/site-packages/tap_rest_api_msdk/tap.py", line 9, in <module>
    from singer_sdk import Tap
  File "/home/my_user/meltano-projects/salesforce_pot/.meltano/extractors/tap-rest-api-msdk/venv/lib64/python3.8/site-packages/singer_sdk/__init__.py", line 7, in <module>
    from singer_sdk.mapper_base import InlineMapper
  File "/home/my_user/meltano-projects/salesforce_pot/.meltano/extractors/tap-rest-api-msdk/venv/lib64/python3.8/site-packages/singer_sdk/mapper_base.py", line 14, in <module>
    from singer_sdk.plugin_base import PluginBase
  File "/home/my_user/meltano-projects/salesforce_pot/.meltano/extractors/tap-rest-api-msdk/venv/lib64/python3.8/site-packages/singer_sdk/plugin_base.py", line 15, in <module>
    from packaging.specifiers import SpecifierSet
ModuleNotFoundError: No module named 'packaging'

I believe package was just added two day ago here:

sdk/singer_sdk/plugin_base.py

Line 15 in ba8c43c

from packaging.specifiers import SpecifierSet

but has not been added to the pyproject.toml file so Meltano is failing because package is not available in my venv.

[edgarrmondragon]

Thanks for reporting! This merits a patch release right after we fix it.