fix: relax any type validation (#142)

src/core/validateGeneratedTypes.ts

@@ -6,6 +6,7 @@ import {
 import ts from "typescript";
 import { join } from "path";
 import { resolveDefaultProperties } from "../utils/resolveDefaultProperties";
+import { fixOptionalAny } from "../utils/fixOptionalAny";
 interface File {
   sourceText: string;
   relativePath: string;
@@ -37,12 +38,13 @@ export function validateGeneratedTypes({
     target: compilerOptions.target,
   });
   const projectRoot = process.cwd();
-  fsMap.set(
-    getPath(sourceTypes),
+  const src = fixOptionalAny(
     skipParseJSDoc
       ? sourceTypes.sourceText
       : resolveDefaultProperties(sourceTypes.sourceText)
   );
+
+  fsMap.set(getPath(sourceTypes), src);
   fsMap.set(getPath(zodSchemas), zodSchemas.sourceText);
   fsMap.set(getPath(integrationTests), integrationTests.sourceText);
 

src/utils/fixOptionalAny.ts

@@ -0,0 +1,41 @@
+import ts, { factory as f } from "typescript";
+
+/**
+ * Add optional property to `any` to workaround comparaison issue.
+ *
+ * ref: https://github.com/fabien0102/ts-to-zod/issues/140
+ */
+export function fixOptionalAny(sourceText: string) {
+  const sourceFile = ts.createSourceFile(
+    "index.ts",
+    sourceText,
+    ts.ScriptTarget.Latest
+  );
+  const printer = ts.createPrinter({ newLine: ts.NewLineKind.LineFeed });
+
+  const markAnyAsOptional: ts.TransformerFactory<ts.SourceFile> = (context) => {
+    const visit: ts.Visitor = (node) => {
+      node = ts.visitEachChild(node, visit, context);
+
+      if (
+        ts.isPropertySignature(node) &&
+        node.type?.kind === ts.SyntaxKind.AnyKeyword
+      ) {
+        return ts.factory.createPropertySignature(
+          node.modifiers,
+          node.name,
+          f.createToken(ts.SyntaxKind.QuestionToken), // Add `questionToken`
+          node.type
+        );
+      }
+
+      return node;
+    };
+
+    return (node) => ts.visitNode(node, visit);
+  };
+
+  const outputFile = ts.transform(sourceFile, [markAnyAsOptional]);
+
+  return printer.printFile(outputFile.transformed[0]);
+}