patch.js•2.6 kB
#!/usr/bin/env node
/**
* This script fixes the MCP SDK issue with pkce-challenge ES Module
* It replaces the static require with a dynamic import in the auth.js file
*/
const fs = require("fs");
const path = require("path");
// Path to the file that needs patching
const authFilePath = path.resolve(
__dirname,
"node_modules",
"@modelcontextprotocol",
"sdk",
"dist",
"cjs",
"client",
"auth.js"
);
console.log("Checking if MCP SDK patch is needed...");
// Check if the file exists
if (!fs.existsSync(authFilePath)) {
console.error(`Error: File not found at ${authFilePath}`);
console.log(
"Make sure you have installed @modelcontextprotocol/sdk package"
);
process.exit(1);
}
// Read the file content
const fileContent = fs.readFileSync(authFilePath, "utf8");
// Check if the file already contains our patch
if (fileContent.includes("loadPkceChallenge")) {
console.log("MCP SDK is already patched!");
process.exit(0);
}
// Check if the file contains the problematic require
if (!fileContent.includes('require("pkce-challenge")')) {
console.log(
"The MCP SDK file does not contain the expected require statement."
);
console.log("This patch may not be needed or the SDK has been updated.");
process.exit(0);
}
console.log("Applying patch to MCP SDK...");
// The code to replace the problematic require
const requireLine =
'const pkce_challenge_1 = __importDefault(require("pkce-challenge"));';
const replacementCode = `let pkce_challenge_1 = { default: null };
async function loadPkceChallenge() {
if (!pkce_challenge_1.default) {
const mod = await import("pkce-challenge");
pkce_challenge_1.default = mod.default;
}
}`;
// Replace the require line
let patchedContent = fileContent.replace(requireLine, replacementCode);
// Replace the function call to add the loading step
const challengeCall =
"const challenge = await (0, pkce_challenge_1.default)();";
const replacementCall =
"await loadPkceChallenge();\n const challenge = await pkce_challenge_1.default();";
patchedContent = patchedContent.replace(challengeCall, replacementCall);
// Write the patched content back to the file
fs.writeFileSync(authFilePath, patchedContent, "utf8");
console.log("✅ MCP SDK patched successfully!");
console.log("The patch changes:");
console.log(
"1. Replaced static require with dynamic import for pkce-challenge"
);
console.log("2. Added async loading function to handle the import");
console.log(
"\nYou should now be able to run the application without ESM errors."
);
