Add default config file location for init action

[GeekMasher]

This pull request includes an update to the src/init-action.ts file to improve the handling of the configuration file in the run function. The most important change is the addition of logic to set a default configuration file location if none is provided.

Improvements to configuration file handling:

• src/init-action.ts: Changed the configFile variable to be mutable and added logic to check for a default configuration file location at .github/codeql/codeql.yml within the GITHUB_WORKSPACE if no configuration file is specified. If the default configuration file exists, it sets configFile to this location and logs the path. Otherwise, it logs that no configuration file was found.

Merge / deployment checklist

• Confirm this change is backwards compatible with existing workflows.
• Confirm the readme has been updated if necessary.
• Confirm the changelog has been updated if necessary.

[Copilot]

Pull Request Overview

This PR improves the configuration file handling in the init action by adding logic to use a default configuration file if none is provided.

• Made the configFile variable mutable
• Added a default config file lookup in GITHUB_WORKSPACE
• Logged appropriate messages based on whether the default file is found

Comments suppressed due to low confidence (1)

src/init-action.ts:302

• Consider checking for both undefined and empty string values for configFile, as getOptionalInput may return an empty string when the input is not provided.

if (configFile === undefined) {

Tip: Copilot only keeps its highest confidence comments to reduce noise and keep you focused. Learn more

[NlightNFotis]

Thank you for the contribution, this looks reasonable to me.

I think we also need a changelog entry for this change, and it also might be something that might need a docs change, but I will let someone else confirm that.

[NlightNFotis]

I'm curious whether it would make sense to add a log message if the default file fails to be found, to warn both the users and us when debugging that something has gone very wrong.

[GeekMasher]

I actually added it in the first commit but thought it would almost always trigger a log that no config was used. I'm okay with either personally

[NlightNFotis]

Hi @GeekMasher , this PR will need the latest main merged in (or rebased) and the just sync instruction to be re-run.

If you're busy with other stuff, please do let us know and we can shepherd this in for you.

[GeekMasher]

@NlightNFotis Great, I have pulled in and updated the lib now. Let me know if you need anything else

[GeekMasher]

Removing for now until we have a better pattern to support this