How to add additional cfc-lint module?

[keironlowe-edriving]

Hi, I'm trying to implement this with the additional Serverless Rules module but it doesn't work. It fails with the following error...

2023-03-28 14:49:11,320 - cfnlint - ERROR - Tried to append rules but got an error: No module named 'cfn_lint_serverless'

Not 100% familiar with Python, but could it be that you're setting up a virtual python env? So when I do pip install cfn-lint-serverless it's not being installed into the correct env? If so, could a possible solution be to add the path to the virtual env as an output for the step?

Below is my workflow file...

name: CI

on:
  pull_request:

jobs:
  cfn_lint:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v3
        with:
          fetch-depth: 0

      - name: Setup Cloud Formation Linter with Latest Version
        uses: scottbrenner/cfn-lint-action@v2

      - run: pip install cfn-lint-serverless

      - name: Print the Cloud Formation Linter Version & run Linter.
        run: |
          cfn-lint --version
          cfn-lint -t template.yaml -a cfn_lint_serverless.rules

[keironlowe-edriving]

Worked around it by using the following steps, to find the virtual env python executable and install the module using that, but obviously not an ideal solution.

- name: Find Python Virtual Env
  run: echo "VIRTUAL_ENV=\"$(find /tmp/setup-cfn-lint-*/.venv/bin/python -name 'python' -maxdepth 1)\"" >> $GITHUB_ENV

- name: Install Serverless Rules
  run: ${{ env.VIRTUAL_ENV }} -m pip install cfn-lint-serverless