Finish backlog cleanup for Pi integration

scripts/lib/pi-extension-loader-patch.d.mts

@@ -0,0 +1 @@
+export function patchPiExtensionLoaderSource(source: string): string;

scripts/lib/pi-extension-loader-patch.mjs

@@ -0,0 +1,32 @@
+const PATH_TO_FILE_URL_IMPORT = 'import { fileURLToPath, pathToFileURL } from "node:url";';
+const FILE_URL_TO_PATH_IMPORT = 'import { fileURLToPath } from "node:url";';
+
+const IMPORT_CALL = 'const module = await jiti.import(extensionPath, { default: true });';
+const PATCHED_IMPORT_CALL = [
+	'    const extensionSpecifier = process.platform === "win32" && path.isAbsolute(extensionPath)',
+	'        ? pathToFileURL(extensionPath).href',
+	'        : extensionPath;',
+	'    const module = await jiti.import(extensionSpecifier, { default: true });',
+].join("\n");
+
+export function patchPiExtensionLoaderSource(source) {
+	let patched = source;
+
+	if (patched.includes(PATH_TO_FILE_URL_IMPORT) || patched.includes(PATCHED_IMPORT_CALL)) {
+		return patched;
+	}
+
+	if (patched.includes(FILE_URL_TO_PATH_IMPORT)) {
+		patched = patched.replace(FILE_URL_TO_PATH_IMPORT, PATH_TO_FILE_URL_IMPORT);
+	}
+
+	if (!patched.includes(PATH_TO_FILE_URL_IMPORT)) {
+		return source;
+	}
+
+	if (!patched.includes(IMPORT_CALL)) {
+		return source;
+	}
+
+	return patched.replace(IMPORT_CALL, PATCHED_IMPORT_CALL);
+}