add reruning script, moved dir creation to separated func, sumodule support

contribute.py

@@ -8,7 +8,7 @@
 import sys
 
 
-def main(def_args=sys.argv[1:]):
+def main(def_args=sys.argv[1:]) -> None:
     args = arguments(def_args)
     curr_date = datetime.now()
     directory = 'repository-' + curr_date.strftime('%Y-%m-%d-%H-%M-%S')
@@ -27,9 +27,8 @@ def main(def_args=sys.argv[1:]):
     days_after = args.days_after
     if days_after < 0:
         sys.exit('days_after must not be negative')
-    os.mkdir(directory)
-    os.chdir(directory)
-    run(['git', 'init', '-b', 'main'])
+
+    chdir_to_repo(repository, directory)
 
     if user_name is not None:
         run(['git', 'config', 'user.name', user_name])
@@ -55,23 +54,40 @@ def main(def_args=sys.argv[1:]):
           '\x1b[6;30;42mcompleted successfully\x1b[0m!')
 
 
-def contribute(date):
+def contribute(date) -> None:
     with open(os.path.join(os.getcwd(), 'README.md'), 'a') as file:
         file.write(message(date) + '\n\n')
     run(['git', 'add', '.'])
     run(['git', 'commit', '-m', '"%s"' % message(date),
          '--date', date.strftime('"%Y-%m-%d %H:%M:%S"')])
+
+
+def chdir_to_repo(repository, directory) -> None:
+    git_command = ['git', repository, directory]
+    if ".git" in os.listdir():
+        git_command.insert(1, 'submodule')
+        git_command.insert(2, 'add')
+    else:
+        git_command.insert(1, 'clone')
+    if directory not in os.listdir():
+        try:
+            run(git_command)
+        except Exception as e:
+            print(e)
+            raise Exception('Repository does not exist. Please check if the link is ssh and do your user has access to your ssh keys')
+    os.chdir(directory)
+    run(['git', 'pull'])
 
 
-def run(commands):
+def run(commands) -> None:
     Popen(commands).wait()
 
 
-def message(date):
+def message(date) -> str:
     return date.strftime('Contribution: %Y-%m-%d %H:%M')
 
 
-def contributions_per_day(args):
+def contributions_per_day(args) -> int:
     max_c = args.max_commits
     if max_c > 20:
         max_c = 20
@@ -80,7 +96,7 @@ def contributions_per_day(args):
     return randint(1, max_c)
 
 
-def arguments(argsval):
+def arguments(argsval) -> argparse.Namespace:
     parser = argparse.ArgumentParser()
     parser.add_argument('-nw', '--no_weekends',
                         required=False, action='store_true', default=False,