Revert "Convert IPv6 addresses to lowercase in apply-patch (#2299)" (#2758)

This reverts commit 28b6ba5.


There are some issues when GCU tries to remove the interface IP in some tests, such as add rack test.

In the initial config, the INTERFACE's IPv6 was all loaded in uppercase by default.

    "INTERFACE": {
        "Ethernet68": {},
        "Ethernet68|10.0.0.34/31": {},
        "Ethernet68|FC00::45/126": {},
        "Ethernet72": {},
        "Ethernet72|10.0.0.36/31": {},
        "Ethernet72|FC00::49/126": {},
GCU will never be able to remove that IP because IPv6 was always translated to lowercase due to #2299 . It reported the error can't remove a non-existent object, thus making GCU fail.

#2299  is to deal with this issue: sonic-net/sonic-buildimage#11622.

Although config CLI always translates uppercase to lowercase when adding an IP, the user can have two choices to remove that IP: One is to use config CLI to remove that IP no matter uppercase or lowercase. Another way is to use GCU. In order to use GCU, the user has to check the IP format saved in ConfigDB because GCU operation does differentiate between uppercase and lowercase.
#### What I did
Revert #2299

Author: wen587

config/main.py

@@ -1362,20 +1362,6 @@ def apply_patch(ctx, patch_file_path, format, dry_run, ignore_non_yang_tables, i
             patch_as_json = json.loads(text)
             patch = jsonpatch.JsonPatch(patch_as_json)
 
-        # convert IPv6 addresses to lowercase
-        for patch_line in patch:
-            if 'remove' == patch_line['op']:
-                match = re.search(r"(?P<prefix>/INTERFACE/\w+\|)(?P<ipv6_address>([a-fA-F0-9]{0,4}[:~]|::){1,7}[a-fA-F0-9]{0,4})"
-                                    "(?P<suffix>.*)", str.format(patch_line['path']))
-                if match:
-                    prefix = match.group('prefix')
-                    ipv6_address_str = match.group('ipv6_address')
-                    suffix = match.group('suffix')
-                    ipv6_address_str = ipv6_address_str.lower()
-                    click.secho("converted ipv6 address to lowercase {} with prefix {} in value: {}"
-                                .format(ipv6_address_str, prefix, patch_line['path']))
-                    patch_line['path'] = prefix + ipv6_address_str + suffix
-
         config_format = ConfigFormat[format.upper()]
         GenericUpdater().apply_patch(patch, config_format, verbose, dry_run, ignore_non_yang_tables, ignore_path)
 

tests/ip_config_input/patch_ipv6.test

@@ -1,5 +1,3 @@
-import json
-import jsonpatch
 import os
 import traceback
 from unittest import mock
@@ -14,9 +12,6 @@
 from utilities_common.db import Db
 import utilities_common.bgp_util as bgp_util
 
-test_path = os.path.dirname(os.path.abspath(__file__))
-ip_config_input_path = os.path.join(test_path, "ip_config_input")
-
 ERROR_MSG = "Error: IP address is not valid"
 
 INVALID_VRF_MSG ="""\
@@ -243,21 +238,6 @@ def test_add_del_interface_shortened_ipv6_with_leading_zeros(self):
         assert result.exit_code != 0
         assert ('Ethernet68', '3000::1/64') not in db.cfgdb.get_table('INTERFACE')
 
-    def test_remove_interface_case_sensitive_mock_ipv6_w_apply_patch(self):
-        runner = CliRunner()
-        any_patch_as_json = [{"op": "remove", "path": "/INTERFACE/Ethernet12|FC00::1~1126"}]
-        any_patch = jsonpatch.JsonPatch(any_patch_as_json)
-        any_patch_as_text = json.dumps(any_patch_as_json)
-        ipv6_patch_file = os.path.join(ip_config_input_path, 'patch_ipv6.test')
-
-        # config apply-patch patch
-        mock_generic_updater = mock.Mock()
-        with mock.patch('config.main.GenericUpdater', return_value=mock_generic_updater):
-            with mock.patch('builtins.open', mock.mock_open(read_data=any_patch_as_text)):
-                result = runner.invoke(config.config.commands["apply-patch"], [ipv6_patch_file], catch_exceptions=False)
-        print(result.exit_code, result.output)
-        assert "converted ipv6 address to lowercase fc00::1~1126 with prefix /INTERFACE/Ethernet12| in value: /INTERFACE/Ethernet12|FC00::1~1126" in result.output
-
     def test_intf_vrf_bind_unbind(self):
         runner = CliRunner()
         db = Db()