File Extension test doesn't match with default on check-modified-files-only

[Matticusau]

I have been using this config:

name: Check Markdown links

on:
  pull_request

jobs:
  markdown-link-check:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@master
    - uses: gaurav-nelson/github-action-markdown-link-check@v1
      with:
        use-quiet-mode: 'no'
        use-verbose-mode: 'yes'
        config-file: './.github/mlc_config.json'
        check-modified-files-only: 'yes'

While my own tests work locally with the command line tool, the action workflow never checks any file.

I forked the repo and added a bit of echo logging so i could test exactly what was going on. The extension test fails as it strips the leading . off the extension of the modified file as shown in this screen shot.

I cannot share the run log as it is from a private repo.

When I update the workflow yaml config with the file_extension: md this works around the issue:

Here's some of the solution options I am think about:

• Update the default parameter value?
• Update the documentation?
• Update the if [ "${i##*.}" = "${FILE_EXTENSION}" ]; then code to ensure it includes the leading .

Thoughts? I'm happy to contribute once I know the direction you would like to take it.

[gaurav-nelson]

Thanks @Matticusau for reporting and debugging. I've fixed it with #64, will publish soon.