Github Comment Reporter - marker not unique, message is overwritten in monorepo context

[ancosma]

Describe the bug
When used in the context of monorepo and a single PR, we run same workflow multiple time. Each time the working directory we pass to megalinter is a different one. Because megalinter uses only GITHUB_WORKFLOW and GITHUB_JOB it will overwrite the message created by previous run of the megalinter for other directories.

To Reproduce
Steps to reproduce the behavior:

1. Create a PR
2. (which) Run a workflow which start same reusable megalinter workflow invoked with 2 different directories

Expected behavior
Because we run same workflow but on different folders, we expect to get 2 comments each reporting for the folder in which megalinter ran.

P.S.:
In order to make the marker unique, it should include the directory in which megalinter ran.
In case you agree with the change, I can create a PR which fixes the issue. Should it be a breaking change or first try to identify the message using the old marker (without directory included) and then try with the marker which uses the directory?

[nvuillam]

@ancosma i'd be delighted to validate such PR, thanks for your offer :)

[Kurt-von-Laven]

@ancosma, we have historically preferred introducing a fallback option to introducing a breaking change. Can you explain why the fallback option would be needed to avoid a breaking change in this case though?

[nvuillam]

If the directory is root, the marker value must remain the same, to avoid a breaking change
Extended marker should happen only if the linting root has been overridden :)

[Kurt-von-Laven]

Oh, I see; I was taking that for granted. Yes, that seems like the correct path to me.

[github-actions]

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