fix(cli): add ability to disable SSL verification

Add a `--no-ssl-verify` option to disable SSL verification

Closes: #2714

gitlab/cli.py

@@ -194,14 +194,25 @@ def _get_base_parser(add_help: bool = True) -> argparse.ArgumentParser:
         required=False,
         default=os.getenv("GITLAB_URL"),
     )
-    parser.add_argument(
+
+    ssl_verify_group = parser.add_mutually_exclusive_group()
+    ssl_verify_group.add_argument(
         "--ssl-verify",
         help=(
-            "Whether SSL certificates should be validated. [env var: GITLAB_SSL_VERIFY]"
+            "Path to a CA_BUNDLE file or directory with certificates of trusted CAs. "
+            "[env var: GITLAB_SSL_VERIFY]"
         ),
         required=False,
         default=os.getenv("GITLAB_SSL_VERIFY"),
     )
+    ssl_verify_group.add_argument(
+        "--no-ssl-verify",
+        help="Disable SSL verification",
+        required=False,
+        dest="ssl_verify",
+        action="store_false",
+    )
+
     parser.add_argument(
         "--timeout",
         help=(

tests/unit/test_cli.py

@@ -106,6 +106,13 @@ def test_base_parser():
     assert args.verbose
     assert args.gitlab == "gl_id"
     assert args.config_file == ["foo.cfg", "bar.cfg"]
+    assert args.ssl_verify is None
+
+
+def test_no_ssl_verify():
+    parser = cli._get_base_parser()
+    args = parser.parse_args(["--no-ssl-verify"])
+    assert args.ssl_verify is False
 
 
 def test_v4_parse_args():