Describe the bug
https://github.com/fabasoad/linguist-action/actions?query=workflow%3A%22Security+tests%22

Expected behavior
No security issues.

Actual behavior
There are security issues found in Dockerfile.

Is your feature request related to a problem? Please describe.
Add unit tests to be sure that functionality works as expected.

Describe the solution you'd like
Cover linguist.rb by unite tests. Add unit testing to CI pipeline.

Describe alternatives you've considered
Functional tests for now.

Additional context
N/A

Describe the bug

Linguist-action has stopped outputting data as environment variables, making the data inaccessible to other actions in a workflow.

Steps to Reproduce

1. Run linguist-action in a workflow using the following configuration

      - name: Linguist Action
        uses: fabasoad/[email protected]
        id: linguist
        with:
          path: './'
          percentage: true

2. See error /linguist.rb:15:in 'new': repository path '/github/workspace/' is not owned by current user (Rugged::ConfigError) from /linguist.rb:15:in '<main>'

Expected behavior

The expectation is that linguist-action would output a environment variable that would be accessible to other actions in a workflow.

Actual behavior

There is no environment variable.

Screenshots

There is supposed to be a variable called REPO_LANGS (derived from ${{ steps.linguist.outputs.data }} in the workflow file below) in the with: section of the logs.

Technical information (please complete the following information)

• OS: ubuntu-latest
• linguist-action version 1.0.2
• Full workflow:

name: multigitminder
on:
  push:
    branches: [ main, lang-bug ]
  issues:
    types: [ closed ]

jobs:
  multigitminder:
    runs-on: ubuntu-latest
    name: multigitminder
    steps:
      # Checkout
      - name: Checkout
        uses: actions/checkout@v2
      - name: "TODO to Issue"
        uses: "alstr/[email protected]"
        id: "todo"
        with:
          TOKEN: ${{ secrets.GITHUB_TOKEN }}
          CLOSE_ISSUES: false
      # Linguist
      - name: Linguist Action
        uses: fabasoad/[email protected]
        id: linguist
        with:
          path: './'
          percentage: true
      # multigitminder
      - name: multigitminder
        uses: HaydenMacDonald/[email protected]
        id: multigitminder
        with:
          USERNAME: ${{ secrets.BEEMINDER_USERNAME }}
          AUTH_TOKEN: ${{ secrets.BEEMINDER_AUTH_TOKEN }}
          GOAL: multigitminder
          TARGET_LANGS: Python ## e.g. "['python', 'dockerfile', 'javascript']" or simply Python
          REPO_LANGS: ${{ steps.linguist.outputs.data }}