cmd/pkgserver: finish search implementation

cmd/pkgserver/search.go

@@ -22,9 +22,13 @@ type searchCacheEntry struct {
 }
 
 func (index *packageIndex) performSearchQuery(limit int, i int, search string, desc bool) (int, []searchResult, error) {
-	entry, ok := index.search[search]
-	if ok {
-		return len(entry.results), entry.results[i:min(i+limit, len(entry.results))], nil
+	query := search
+	if desc {
+		query += ";withDesc"
+	}
+	entry, ok := index.search[query]
+	if ok && len(entry.results) > 0 {
+		return len(entry.results), entry.results[min(i, len(entry.results)-1):min(i+limit, len(entry.results))], nil
 	}
 
 	regex, err := regexp.Compile(search)
@@ -59,7 +63,7 @@ func (index *packageIndex) performSearchQuery(limit int, i int, search string, d
 		results: res,
 		expiry:  expiry,
 	}
-	index.search[search] = entry
+	index.search[query] = entry
 
 	return len(res), res[i:min(i+limit, len(entry.results))], nil
 }