Add Ruby as a possible language

[aibaars]

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.

[aeisenberg]

Catch malformed json errors and rethrow with a meaningful message.

Suggested change

	return JSON.parse(output);
	try {
	return JSON.parse(output);
	} catch (e) {
	throw new Error("Something meaningful.);
	}

[aibaars]

Wouldn't that suppress the likely interesting error message of e ? In Java I'd write new Error("Unexpected output from codeql resolve languages", e) . What would be the equivalent in Javascript?

[robertbrignull]

I think just construct the message as a string. So like new Error("Unexpected output from codeql resolve languages: " + e.message) and maybe some type checks to make sure that e.message exists.

[aibaars]

I opted to just write Unexpected output from codeql resolve languages: ${e} . This should include the original error's type and side-steps the problem of a potentially empty message string.

[aeisenberg]

We're populating the changelog now. Since this is a public-facing feature, could you add an entry. And then it's good to merge. Thanks!

[aibaars]

We're populating the changelog now. Since this is a public-facing feature, could you add an entry. And then it's good to merge. Thanks!

There shouldn't be an entry. This is just for internal tests. CodeQL for Ruby is not available yet.