fix: producer must not replace placeholder in source string

yao-pkg · Sep 4, 2024 · f4d254c · f4d254c
1 parent 30af1d8
commit f4d254c
Showing 1 changed file with 12 additions and 1 deletion.
diff --git a/lib/producer.ts b/lib/producer.ts
@@ -37,14 +37,25 @@ function discoverPlaceholder(
   binaryBuffer: Buffer,
   searchString: string,
   padder: string,
+  searchOffset: number = 0,
 ): Placeholder | NotFound {
   const placeholder = Buffer.from(searchString);
-  const position = binaryBuffer.indexOf(placeholder);
+  const position = binaryBuffer.indexOf(placeholder, searchOffset);
 
   if (position === -1) {
     return { notFound: true };
   }
 
+  // reject source code literal if it occurs first in binary
+  if (binaryBuffer[position - 1] === 39 /* ascii for ' APOSTROPHE */) {
+    return discoverPlaceholder(
+      binaryBuffer,
+      searchString,
+      padder,
+      position + placeholder.length,
+    );
+  }
+
   return { position, size: placeholder.length, padder };
 }