Line number parser doesn't utilize @ava/typescript's compilation output

[novemberborn]

Line number selection doesn't use the @ava/typescript provider to resolve the compiled JS file. This means it's parsing the actual TypeScript file which is not supported:

ava/lib/worker/base.js

Lines 42 to 51 in ac0d75d

	let checkSelectedByLineNumbers;
	try {
	checkSelectedByLineNumbers = lineNumberSelection({
	file: options.file,
	lineNumbers: options.lineNumbers,
	});
	} catch (error) {
	channel.send({type: 'line-number-selection-error', err: serializeError('Line number selection error', false, error, options.file)});
	checkSelectedByLineNumbers = () => false;
	}

We'd need to amend the worker interface to make the file resolver available:

https://github.com/avajs/typescript/blob/34da7bf008bd94e4844562ed86f5446faae6c087/index.js#L152-L168

This requires a new protocol identifier, and the file resolver should only be called if available to retain compatibility with the current @ava/typescript version. I can explain more when we get to this point:

ava/lib/provider-manager.js

Lines 12 to 14 in ac0d75d

	const levelsByProtocol = {
	'ava-3.2': levels.levelIntegersAreCurrentlyUnused,
	};

We can then install the providers earlier:

ava/lib/worker/base.js

Lines 123 to 132 in ac0d75d

	// Install before processing options.require, so if helpers are added to the
	// require configuration the *compiled* helper will be loaded.
	const {projectDir, providerStates = []} = options;
	const providers = [];
	await Promise.all(providerStates.map(async ({type, state}) => {
	if (type === 'typescript') {
	const provider = await providerManager.typescript(projectDir);
	providers.push(provider.worker({extensionsToLoadAsModules, state}));
	}
	}));