Add PACKAGES files

src/db.js

@@ -1,5 +1,6 @@
 import {MongoClient, GridFSBucket} from 'mongodb';
 import {Readable} from  "node:stream";
+import path from 'node:path';
 import {pkgfields, doc_to_paths} from './tools.js';
 import createError from 'http-errors';
 
@@ -234,18 +235,29 @@ function mongo_universe_files(user, prefix, start_after){
     if(!docs.length) //should not happen because we checked earlier
       throw createError(404, `No packages found in ${universe}`);
     var files = [];
+    var indexes = {};
     docs.forEach(function(doc){
-      doc_to_paths(doc).forEach(function(path){
-        if(!prefix || path.startsWith(prefix)) {
+      doc_to_paths(doc).forEach(function(fpath){
+        if(!prefix || fpath.startsWith(prefix)) {
           files.push({
-            Key: path, 
+            Key: fpath,
             ETag: doc._id,
             LastModified: doc._published.toISOString(),
             Size: doc._filesize
           });
+          var repodir = path.dirname(fpath);
+          if(!(indexes[repodir] > doc._published)){
+            indexes[repodir] = doc._published;
+          }
         }
       });
     });
+
+    for (const [path, date] of Object.entries(indexes)) {
+      files.push({ Key: path + '/PACKAGES', LastModified: date.toISOString()});
+      files.push({ Key: path + '/PACKAGES.gz', LastModified: date.toISOString()});
+    }
+
     if(start_after){
       var index = files.findIndex(x => x.Key == start_after);
       if(index > -1){

views/S3List.pug

@@ -15,5 +15,7 @@ ListBucketResult(xmlns="http://s3.amazonaws.com/doc/2006-03-01/")
     Contents
       Key #{x.Key}
       LastModified #{x.LastModified}
-      ETag "#{x.ETag}"
-      Size #{x.Size}
+      if x.ETag
+        ETag "#{x.ETag}"
+      if x.Size
+        Size #{x.Size}