fix(contracts): guard module path resolution without import.meta.url

Author: Ansonhkg

packages/contracts/src/custom-network-signatures.ts

@@ -52,6 +52,30 @@ export interface BuildSignaturesFromContextResult {
   baseDirectory: string;
 }
 
+/**
+ * Resolves the on-disk path of this module in both ESM and CJS bundles.
+ * Falls back to __filename when bundlers strip import.meta.url.
+ */
+function getCurrentModulePath(): string | undefined {
+  const moduleUrl = (
+    import.meta as unknown as { url?: string } | undefined
+  )?.url;
+
+  if (moduleUrl) {
+    try {
+      return fileURLToPath(moduleUrl);
+    } catch (error) {
+      console.warn('Failed to resolve fileURLToPath from import.meta.url:', error);
+    }
+  }
+
+  if (typeof __filename === 'string') {
+    return __filename;
+  }
+
+  return undefined;
+}
+
 /**
  * Gets the base directory for resolving paths
  * @param useScriptDirectory - Whether to use script's directory or current working directory
@@ -75,9 +99,14 @@ function getBaseDirectory(
       return __dirname;
     }
     // When running as module without callerPath
-    const moduleDir = dirname(fileURLToPath(import.meta.url));
-    console.log('Using module directory:', moduleDir);
-    return moduleDir;
+    const modulePath = getCurrentModulePath();
+    if (modulePath) {
+      const moduleDir = dirname(modulePath);
+      console.log('Using module directory:', moduleDir);
+      return moduleDir;
+    }
+    console.log('Using current working directory:', process.cwd());
+    return process.cwd();
   }
   // Use current working directory
   const cwd = process.cwd();
@@ -308,9 +337,12 @@ module.exports = {
 // process.argv[0] is the bun executable
 // process.argv[1] is the script being run
 const mainScriptPath = path.resolve(process.argv[1] || '');
-const currentScriptPath = fileURLToPath(import.meta.url);
+const currentModulePath = getCurrentModulePath();
+const resolvedModulePath = currentModulePath
+  ? path.resolve(currentModulePath)
+  : undefined;
 
-if (mainScriptPath === currentScriptPath) {
+if (resolvedModulePath && mainScriptPath === resolvedModulePath) {
   // This means custom-network-signatures.ts was the script passed to `bun run`
   const jsonFilePath = process.argv[2];
   const networkName = process.argv[3];