Docker image missing /usr/bin/shellcheck

[stephenbmfj]

The megalinter/megalinter:v5 docker image is missing /usr/bin/shellcheck, which is needed by at least one linter (i.e.: actionlint).

To reproduce:

1. Create .github/workflows/test.yml

2. docker run -v /var/run/docker.sock:/var/run/docker.sock:rw -v $PWD:/tmp/lint:rw -e ENABLE_LINTERS=ACTION_ACTIONLINT

3. See error

    fatal error while checking tmp/lint/.github/workflows/test.yml: `/usr/bin/shellcheck ...
   

[nvuillam]

Do you have the same issue with megalinter/megalinter:beta ?

Is it related to rhysd/actionlint#98 ? If the problem is from actionlint, I can't do a lot
But if you need spellcheck as an option dependency, you may define a PRE_COMMAND in your .mega-linter.yml to install it

What is this spellcheck app ? there are a lot in github / google, I don't know which one your refer to :/

Example:

PRE_COMMANDS:
  - command: npm install eslint-plugin-whatever
    cwd: "root"        # Will be run at the root of MegaLinter docker image

[stephenbmfj]

I misread shellcheck as spellcheck. There is a bug, but I think it is completely inside actionlint.