Enhancements to path of recovery files

.gitignore

 pymongodump
+recovery
 tests.py
 .mypy_cache
 .recovery*

lib/utils.py

@@ -3,6 +3,7 @@ import pymongo
 import json
 import re
 import time
+import datetime
 import multiprocessing as mp
 from math import ceil
 from typing import List
@@ -43,7 +44,7 @@ def filesystem_writer(
     if recovery_file:
         recovery_file_path = recovery_file
     else:
-        recovery_file_path = ".recovery_" + database + ".csv"
+        recovery_file_path = build_recovery_filepath(database)
         create_recovery_file(
             recovery_file_path, host, port, database, pagesize)
 
@@ -274,6 +275,25 @@ def dump_recovery_file(
         "Generated recovery file at {}".format(recovery_file_path))
 
 
+def build_recovery_filepath(dbname: str) -> str:
+    """
+    Build the path of a recovery file
+
+    :param dbname: name of the database being queried
+    :returns: the path of the recovery file generated in this execution
+    """
+    recovery_dir = "./recovery"
+    if not os.path.isdir(recovery_dir):
+        os.mkdir(recovery_dir)
+    now = datetime.datetime.now()
+    datetime_str = "%04d%02d%02d-%02d%02d%02d" %\
+        (now.year, now.month, now.day, now.hour, now.minute, now.second)
+    recovery_file_path = os.path.join(
+        recovery_dir, "recovery_" + dbname + "_" + datetime_str + ".csv")
+
+    return recovery_file_path
+
+
 def create_recovery_file(
         file_path: str,
         host: str,