Add nginx settings conditionally, as at least one of them will be added in devpi-server 6.18.0.

Author: fschulze

tests/conftest.py

@@ -27,8 +27,10 @@ def adjust_nginx_conf_content(content):
         listen = re.search(r'listen \d+;', content).group(0)
         new_content = nginx_path.joinpath('nginx-devpi-lockdown.conf').read_text()
         new_content = new_content.replace('listen 80;', listen)
-        new_content = f"proxy_temp_path tmp;\n{new_content}"
-        new_content = f"client_body_temp_path tmp;\n{new_content}"
+        if "proxy_temp_path" not in new_content:
+            new_content = f"proxy_temp_path tmp;\n{new_content}"
+        if "client_body_temp_path" not in new_content:
+            new_content = f"client_body_temp_path tmp;\n{new_content}"
         return new_content
     return adjust_nginx_conf_content