Only test bundled CA certs on macOS

bypy/init_env.py

@@ -30,6 +30,7 @@ def initialize_constants():
     kitty_constants['appname'] = re.search(
             r'appname: str\s+=\s+(u{0,1})[\'"]([^\'"]+)[\'"]', src
     ).group(2)
+    kitty_constants['cacerts_url'] = 'https://curl.haxx.se/ca/cacert.pem'
     return kitty_constants
 
 

bypy/macos/__main__.py

@@ -185,8 +185,7 @@ class Freeze(object):
     def add_ca_certs(self):
         print('\nDownloading CA certs...')
         from urllib.request import urlopen
-        ca_certs_url = 'https://curl.haxx.se/ca/cacert.pem'
-        certs = urlopen(ca_certs_url).read()
+        certs = urlopen(kitty_constants['cacerts_url']).read()
         dest = os.path.join(self.contents_dir, 'Resources', 'cacert.pem')
         with open(dest, 'wb') as f:
             f.write(certs)