Function resolveCodeFile

packages/shared/resolve-file.ts:297–368

(
	input: string,
	projectRoot: string,
	baseDir?: string,
)

 * not_found rather than fabricating a match against `foo.ts` somewhere in cwd.
 */
export async function resolveCodeFile(
	input: string,
	projectRoot: string,
	baseDir?: string,
): Promise<ResolveResult> {
	const originalInput = input.trim();
	const unquotedInput = stripWrappingQuotes(originalInput);
	const normalizedInput = normalizeUserPathInput(unquotedInput);
	const searchInput = normalizeSeparators(normalizedInput);

	if (!searchInput) {
		return { kind: "not_found", input: originalInput };
	}

	if (isAbsoluteNormalizedUserPath(normalizedInput)) {
		const absolutePath = resolveAbsolutePath(normalizedInput);
		if (fileExists(absolutePath)) {
			return { kind: "found", path: absolutePath };
		}
		return { kind: "not_found", input: originalInput };
	}

	const fromRoot = resolve(projectRoot, searchInput);
	if (isWithinProjectRoot(fromRoot, projectRoot) && fileExists(fromRoot)) {
		return { kind: "found", path: fromRoot };
	}

	if (baseDir) {
		const fromBase = resolve(baseDir, searchInput);
		if (fileExists(fromBase)) {
			return { kind: "found", path: fromBase };
		}
	}

	const fileList = await warmFileListCache(projectRoot, "code");
	if (fileList === null) {
		return { kind: "unavailable", input: originalInput };
	}

	// Strip leading `./` so suffix matching works on inputs like
	// `./editor/App.tsx` — file list entries never carry that segment.
	// `../` is intentionally NOT stripped: `..` is meaningful (escape parent),
	// not noise. If we can't honor it via baseDir, the input has no
	// suffix-match equivalent in the in-tree file list.
	const cleanedInput = searchInput.replace(/^(?:\.\/)+/, "");
	if (!cleanedInput || cleanedInput.startsWith("../")) {
		return { kind: "not_found", input: originalInput };
	}
	const target = cleanedInput.toLowerCase();
	const isBareFilename = !cleanedInput.includes("/");
	const matches: string[] = [];

	for (const f of fileList) {
		const fl = f.toLowerCase();
		if (isBareFilename) {
			const base = fl.split("/").pop();
			if (base === target) matches.push(resolve(projectRoot, f));
		} else {