pip install on latest ubuntu fails with error

Description: github actions for python 3.8 fails with the following error:

ERROR: Invalid requirement: 'Warning: The lock flag' (from line 2 of requirements.txt)

Action version:

runs-on: ubuntu-latest (python-version: [ '3.8' ])
- name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v2
        with:
          python-version: ${{ matrix.python-version }}

Platform:

• Ubuntu)
• macOS
• Windows

Runner type:

• Hosted
• Self-hosted

Tools version:

Repro steps:
Create a repo with Pipfile, add dependencies and lock the Pipfile. run:

python -m pip install --upgrade pip setuptools pipenv virtualenv PyYAML flake8 pylint nose coverage
pipenv --python '3.8' lock -r > requirements.txt
pip install -r requirements.txt

Expected behavior: pip should install all required packages

Actual behavior: pip fails with thee following error:

ERROR: Invalid requirement: 'Warning: The lock flag' (from line 2 of requirements.txt)

[singhpratyush]

A quick fix is sticking to the immediately previous version

python -m pip install --upgrade pip setuptools pipenv==2022.4.21 virtualenv PyYAML flake8 pylint nose coverage

---

Update:

You should consider using pipenv to install dependencies and not convert them to requirements.txt and install using pip (because this).

A good way of doing so can be pipenv install --system if you don’t want to change how you run commands inside your environment.

[matteius]

@ianyoung There was a deprecation warning around install -r for a number of releases, please use the newer pipenv requirements command.