handle more cases of undefined in ListObjects replies

deploy.ts

@@ -45,7 +45,7 @@ async function getFileMd5(file: string): Promise<string> {
 }
 
 async function getBucketFiles(client: S3Client, Bucket: string):
-  Promise<Map<string, { size: number }>>
+  Promise<Map<string, { size: number | null }>>
 {
   const files = new Map();
   let done = false;
@@ -58,8 +58,12 @@ async function getBucketFiles(client: S3Client, Bucket: string):
       process.exit(1)
     }
 
-    for (const item of resp.Contents!) {
-      files.set(item.Key!, { size: item.Size! })
+    if (resp.Contents) {
+      for (const item of resp.Contents) {
+        if (item.Key) {
+          files.set(item.Key, { size: item.Size })
+        }
+      }
     }
 
     if (resp.NextContinuationToken) {
@@ -125,14 +129,16 @@ async function needsUpdate(
   localMd5: string,
   Bucket: string,
   Key: string,
-  remoteSize: number,
+  remoteSize: number | null,
 ): Promise<boolean> {
-  const localSize = (await fs.promises.stat(localFile)).size;
-  if (
-    localSize == 0 /* stat can return 0 in case of error */
-    || localSize != remoteSize
-  ) {
-     return true
+  if (remoteSize) {
+    const localSize = (await fs.promises.stat(localFile)).size;
+    if (
+      localSize == 0 /* stat can return 0 in case of error */
+      || localSize != remoteSize
+    ) {
+      return true
+    }
   }
 
   // fetch metadata for the object and see if we previously stored its md5