Adds the possiblity to pull over HTTP (useful for private repos)

pwm

@@ -168,7 +168,7 @@ def get_projects(token: str, id: str, source: str = 'group') -> List:
     return projects
 
 
-def clone_all(token: str, id: str, directory: str, until_date: Optional[str], source: str = 'group'):
+def clone_all(token: str, id: str, directory: str, until_date: Optional[str], source: str = 'group', use_http: bool = True):
     """
     Clone all repositories (from a group or "forks of") from id (group or
     project id) in directory (created in function).
@@ -206,8 +206,14 @@ def clone_all(token: str, id: str, directory: str, until_date: Optional[str], so
         print('Web url: ' + web_url)
         print('Cloning in "' + directory + '/' + repo_local_name + '"')
 
-        subprocess.run(["git", "clone", "-q", ssh_url_to_repo,
-                        directory + '/' + repo_local_name])
+        if use_http:
+            subprocess.run(["git", "clone", "-q", ssh_url_to_repo,
+                            directory + '/' + repo_local_name])
+        else:
+            url = "{}:{}@{}".format("gitlab-ci-token", token, BASE_URL)
+            subprocess.run(["git", "clone", "-q", web_url.replace(BASE_URL, url),
+                            directory + '/' + repo_local_name])
+
         if until_date:
             commit_id = subprocess.check_output([
                 "git", "rev-list", "-n", "1", "--before=\"" + until_date + "\"",
@@ -298,9 +304,9 @@ def command_clone_all(args):
     """
     if args.forks:
         clone_all(args.token, args.id, args.directory,
-                  args.until_date, 'forks')
+                  args.until_date, 'forks', args.use_http)
     else:
-        clone_all(args.token, args.id, args.directory, args.until_date)
+        clone_all(args.token, args.id, args.directory, args.until_date, args.use_http)
 
 
 def command_list(args):
@@ -415,6 +421,7 @@ if __name__ == '__main__':
         "directory", metavar="DIRECTORY", help="Local directory where clone all repositories.")
     parser_clone.add_argument(
         "-u", "--until_date", help="Do a git checkout for all repositories at given date, format \"YYYY-MM-DD hh:mm\" (optional).")
+    parser_clone.add_argument("--use_http", help="Use the HTTP client instead of SSH. False by default.", action='store_true')
     parser_clone.set_defaults(func=command_clone_all)
 
     parser_list = subparsers.add_parser(