We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
Replace links in the challenge copying command
People might use full url links in the page HTML, use a regex to replace the links using the new challenge short name.

--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `app/grandchallenge/challenges/management/commands/copy_challenge.py`
Content:
```
1 from django.core.management import BaseCommand, CommandError
2 
3 from grandchallenge.challenges.models import Challenge
4 from grandchallenge.pages.models import Page
5 
6 
7 class Command(BaseCommand):
8     help = "Creates a copy of a challenge"
9 
10     challenge_fields = [
11         "creator",
12         "description",
13         "educational",
14         "disclaimer",
15         "require_participant_review",
16         "use_registration_page",
17         "registration_page_text",
18         "use_evaluation",
19         "logo",
20         "banner",
21     ]
22 
23     challenge_m2m_fields = [
24         "task_types",
25         "modalities",
26         "structures",
27     ]
28 
29     config_fields = [
30         "use_teams",
31         "score_title",
32         "score_jsonpath",
33         "score_error_jsonpath",
34         "score_default_sort",
35         "score_decimal_places",
36         "extra_results_columns",
37         "scoring_method_choice",
38         "result_display_choice",
39         "allow_submission_comments",
40         "display_submission_comments",
41         "supplementary_file_choice",
42         "supplementary_file_label",
43         "supplementary_file_help_text",
44         "show_supplementary_file_link",
45         "publication_url_choice",
46         "show_publication_url",
47         "daily_submission_limit",
48         "submission_page_html",
49         "auto_publish_new_results",
50         "display_all_metrics",
51         "submission_join_key",
52     ]
53 
54     page_fields = [
55         "title",
56         "permission_lvl",
57         "order",
58         "display_title",
59         "hidden",
60         "html",
61     ]
62 
63     def add_arguments(self, parser):
64         parser.add_argument("source", type=str)
65         parser.add_argument("dest", type=str)
66 
67     def handle(self, *args, **options):
68         src_name = options.pop("source")
69         dest_name = options.pop("dest")
70 
71         if src_name.lower() == dest_name.lower():
72             raise CommandError("Source and dest names must be different")
73 
74         src_challenge = Challenge.objects.get(short_name__iexact=src_name)
75         dest_challenge = self._create_new_challenge(
76             src_challenge=src_challenge, dest_name=dest_name
77         )
78 
79         self._copy_m2m_fields(
80             src_challenge=src_challenge, dest_challenge=dest_challenge
81         )
82         self._copy_evaluation_config(
83             src_challenge=src_challenge, dest_challenge=dest_challenge
84         )
85         self._copy_pages(
86             src_challenge=src_challenge, dest_challenge=dest_challenge
87         )
88         self._copy_admins(
89             src_challenge=src_challenge, dest_challenge=dest_challenge
90         )
91 
92     def _create_new_challenge(self, *, src_challenge, dest_name):
93         new_challenge = Challenge(
94             short_name=dest_name,
95             **{f: getattr(src_challenge, f) for f in self.challenge_fields},
96         )
97         new_challenge.full_clean()
98         new_challenge.save()
99         return new_challenge
100 
101     def _copy_m2m_fields(self, *, src_challenge, dest_challenge):
102         for f in self.challenge_m2m_fields:
103             src_m2m = getattr(src_challenge, f)
104             dest_m2m = getattr(dest_challenge, f)
105             dest_m2m.set(src_m2m.all())
106 
107     def _copy_evaluation_config(self, *, src_challenge, dest_challenge):
108         src_config = src_challenge.evaluation_config
109         dest_config = dest_challenge.evaluation_config
110 
111         for attr in self.config_fields:
112             setattr(dest_config, attr, getattr(src_config, attr))
113 
114         dest_config.save()
115 
116     def _copy_pages(self, *, src_challenge, dest_challenge):
117         src_pages = src_challenge.page_set.all()
118 
119         for src_page in src_pages:
120             Page.objects.create(
121                 challenge=dest_challenge,
122                 **{f: getattr(src_page, f) for f in self.page_fields},
123             )
124 
125     def _copy_admins(self, *, src_challenge, dest_challenge):
126         for u in src_challenge.get_admins():
127             dest_challenge.add_admin(u)
128
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/app/grandchallenge/challenges/management/commands/copy_challenge.py b/app/grandchallenge/challenges/management/commands/copy_challenge.py
--- a/app/grandchallenge/challenges/management/commands/copy_challenge.py
+++ b/app/grandchallenge/challenges/management/commands/copy_challenge.py
@@ -1,3 +1,6 @@
+import re
+
+from django.contrib.sites.models import Site
 from django.core.management import BaseCommand, CommandError
 
 from grandchallenge.challenges.models import Challenge
@@ -57,7 +60,6 @@
         "order",
         "display_title",
         "hidden",
-        "html",
     ]
 
     def add_arguments(self, parser):
@@ -113,12 +115,24 @@
 
         dest_config.save()
 
+    def _substitute_urls(self, html, domain, old, new):
+        quote_replace = r"href='([^']*)'"
+        regex = fr'href="[^/]*//{old}.{domain}([^""]*)"'
+        html = re.sub(quote_replace, r'href="\1"', html)
+        return re.sub(regex, fr'href="https://{new}.{domain}\1"', html,)
+
     def _copy_pages(self, *, src_challenge, dest_challenge):
         src_pages = src_challenge.page_set.all()
 
+        site = Site.objects.get_current()
+        domain = site.domain
+        old = src_challenge.short_name
+        new = dest_challenge.short_name
+
         for src_page in src_pages:
             Page.objects.create(
                 challenge=dest_challenge,
+                html=self._substitute_urls(src_page.html, domain, old, new),
                 **{f: getattr(src_page, f) for f in self.page_fields},
             )

{"golden_diff": "diff --git a/app/grandchallenge/challenges/management/commands/copy_challenge.py b/app/grandchallenge/challenges/management/commands/copy_challenge.py\n--- a/app/grandchallenge/challenges/management/commands/copy_challenge.py\n+++ b/app/grandchallenge/challenges/management/commands/copy_challenge.py\n@@ -1,3 +1,6 @@\n+import re\n+\n+from django.contrib.sites.models import Site\n from django.core.management import BaseCommand, CommandError\n \n from grandchallenge.challenges.models import Challenge\n@@ -57,7 +60,6 @@\n         \"order\",\n         \"display_title\",\n         \"hidden\",\n-        \"html\",\n     ]\n \n     def add_arguments(self, parser):\n@@ -113,12 +115,24 @@\n \n         dest_config.save()\n \n+    def _substitute_urls(self, html, domain, old, new):\n+        quote_replace = r\"href='([^']*)'\"\n+        regex = fr'href=\"[^/]*//{old}.{domain}([^\"\"]*)\"'\n+        html = re.sub(quote_replace, r'href=\"\\1\"', html)\n+        return re.sub(regex, fr'href=\"https://{new}.{domain}\\1\"', html,)\n+\n     def _copy_pages(self, *, src_challenge, dest_challenge):\n         src_pages = src_challenge.page_set.all()\n \n+        site = Site.objects.get_current()\n+        domain = site.domain\n+        old = src_challenge.short_name\n+        new = dest_challenge.short_name\n+\n         for src_page in src_pages:\n             Page.objects.create(\n                 challenge=dest_challenge,\n+                html=self._substitute_urls(src_page.html, domain, old, new),\n                 **{f: getattr(src_page, f) for f in self.page_fields},\n             )\n", "issue": "Replace links in the challenge copying command\nPeople might use full url links in the page HTML, use a regex to replace the links using the new challenge short name.\n", "before_files": [{"content": "from django.core.management import BaseCommand, CommandError\n\nfrom grandchallenge.challenges.models import Challenge\nfrom grandchallenge.pages.models import Page\n\n\nclass Command(BaseCommand):\n    help = \"Creates a copy of a challenge\"\n\n    challenge_fields = [\n        \"creator\",\n        \"description\",\n        \"educational\",\n        \"disclaimer\",\n        \"require_participant_review\",\n        \"use_registration_page\",\n        \"registration_page_text\",\n        \"use_evaluation\",\n        \"logo\",\n        \"banner\",\n    ]\n\n    challenge_m2m_fields = [\n        \"task_types\",\n        \"modalities\",\n        \"structures\",\n    ]\n\n    config_fields = [\n        \"use_teams\",\n        \"score_title\",\n        \"score_jsonpath\",\n        \"score_error_jsonpath\",\n        \"score_default_sort\",\n        \"score_decimal_places\",\n        \"extra_results_columns\",\n        \"scoring_method_choice\",\n        \"result_display_choice\",\n        \"allow_submission_comments\",\n        \"display_submission_comments\",\n        \"supplementary_file_choice\",\n        \"supplementary_file_label\",\n        \"supplementary_file_help_text\",\n        \"show_supplementary_file_link\",\n        \"publication_url_choice\",\n        \"show_publication_url\",\n        \"daily_submission_limit\",\n        \"submission_page_html\",\n        \"auto_publish_new_results\",\n        \"display_all_metrics\",\n        \"submission_join_key\",\n    ]\n\n    page_fields = [\n        \"title\",\n        \"permission_lvl\",\n        \"order\",\n        \"display_title\",\n        \"hidden\",\n        \"html\",\n    ]\n\n    def add_arguments(self, parser):\n        parser.add_argument(\"source\", type=str)\n        parser.add_argument(\"dest\", type=str)\n\n    def handle(self, *args, **options):\n        src_name = options.pop(\"source\")\n        dest_name = options.pop(\"dest\")\n\n        if src_name.lower() == dest_name.lower():\n            raise CommandError(\"Source and dest names must be different\")\n\n        src_challenge = Challenge.objects.get(short_name__iexact=src_name)\n        dest_challenge = self._create_new_challenge(\n            src_challenge=src_challenge, dest_name=dest_name\n        )\n\n        self._copy_m2m_fields(\n            src_challenge=src_challenge, dest_challenge=dest_challenge\n        )\n        self._copy_evaluation_config(\n            src_challenge=src_challenge, dest_challenge=dest_challenge\n        )\n        self._copy_pages(\n            src_challenge=src_challenge, dest_challenge=dest_challenge\n        )\n        self._copy_admins(\n            src_challenge=src_challenge, dest_challenge=dest_challenge\n        )\n\n    def _create_new_challenge(self, *, src_challenge, dest_name):\n        new_challenge = Challenge(\n            short_name=dest_name,\n            **{f: getattr(src_challenge, f) for f in self.challenge_fields},\n        )\n        new_challenge.full_clean()\n        new_challenge.save()\n        return new_challenge\n\n    def _copy_m2m_fields(self, *, src_challenge, dest_challenge):\n        for f in self.challenge_m2m_fields:\n            src_m2m = getattr(src_challenge, f)\n            dest_m2m = getattr(dest_challenge, f)\n            dest_m2m.set(src_m2m.all())\n\n    def _copy_evaluation_config(self, *, src_challenge, dest_challenge):\n        src_config = src_challenge.evaluation_config\n        dest_config = dest_challenge.evaluation_config\n\n        for attr in self.config_fields:\n            setattr(dest_config, attr, getattr(src_config, attr))\n\n        dest_config.save()\n\n    def _copy_pages(self, *, src_challenge, dest_challenge):\n        src_pages = src_challenge.page_set.all()\n\n        for src_page in src_pages:\n            Page.objects.create(\n                challenge=dest_challenge,\n                **{f: getattr(src_page, f) for f in self.page_fields},\n            )\n\n    def _copy_admins(self, *, src_challenge, dest_challenge):\n        for u in src_challenge.get_admins():\n            dest_challenge.add_admin(u)\n", "path": "app/grandchallenge/challenges/management/commands/copy_challenge.py"}], "after_files": [{"content": "import re\n\nfrom django.contrib.sites.models import Site\nfrom django.core.management import BaseCommand, CommandError\n\nfrom grandchallenge.challenges.models import Challenge\nfrom grandchallenge.pages.models import Page\n\n\nclass Command(BaseCommand):\n    help = \"Creates a copy of a challenge\"\n\n    challenge_fields = [\n        \"creator\",\n        \"description\",\n        \"educational\",\n        \"disclaimer\",\n        \"require_participant_review\",\n        \"use_registration_page\",\n        \"registration_page_text\",\n        \"use_evaluation\",\n        \"logo\",\n        \"banner\",\n    ]\n\n    challenge_m2m_fields = [\n        \"task_types\",\n        \"modalities\",\n        \"structures\",\n    ]\n\n    config_fields = [\n        \"use_teams\",\n        \"score_title\",\n        \"score_jsonpath\",\n        \"score_error_jsonpath\",\n        \"score_default_sort\",\n        \"score_decimal_places\",\n        \"extra_results_columns\",\n        \"scoring_method_choice\",\n        \"result_display_choice\",\n        \"allow_submission_comments\",\n        \"display_submission_comments\",\n        \"supplementary_file_choice\",\n        \"supplementary_file_label\",\n        \"supplementary_file_help_text\",\n        \"show_supplementary_file_link\",\n        \"publication_url_choice\",\n        \"show_publication_url\",\n        \"daily_submission_limit\",\n        \"submission_page_html\",\n        \"auto_publish_new_results\",\n        \"display_all_metrics\",\n        \"submission_join_key\",\n    ]\n\n    page_fields = [\n        \"title\",\n        \"permission_lvl\",\n        \"order\",\n        \"display_title\",\n        \"hidden\",\n    ]\n\n    def add_arguments(self, parser):\n        parser.add_argument(\"source\", type=str)\n        parser.add_argument(\"dest\", type=str)\n\n    def handle(self, *args, **options):\n        src_name = options.pop(\"source\")\n        dest_name = options.pop(\"dest\")\n\n        if src_name.lower() == dest_name.lower():\n            raise CommandError(\"Source and dest names must be different\")\n\n        src_challenge = Challenge.objects.get(short_name__iexact=src_name)\n        dest_challenge = self._create_new_challenge(\n            src_challenge=src_challenge, dest_name=dest_name\n        )\n\n        self._copy_m2m_fields(\n            src_challenge=src_challenge, dest_challenge=dest_challenge\n        )\n        self._copy_evaluation_config(\n            src_challenge=src_challenge, dest_challenge=dest_challenge\n        )\n        self._copy_pages(\n            src_challenge=src_challenge, dest_challenge=dest_challenge\n        )\n        self._copy_admins(\n            src_challenge=src_challenge, dest_challenge=dest_challenge\n        )\n\n    def _create_new_challenge(self, *, src_challenge, dest_name):\n        new_challenge = Challenge(\n            short_name=dest_name,\n            **{f: getattr(src_challenge, f) for f in self.challenge_fields},\n        )\n        new_challenge.full_clean()\n        new_challenge.save()\n        return new_challenge\n\n    def _copy_m2m_fields(self, *, src_challenge, dest_challenge):\n        for f in self.challenge_m2m_fields:\n            src_m2m = getattr(src_challenge, f)\n            dest_m2m = getattr(dest_challenge, f)\n            dest_m2m.set(src_m2m.all())\n\n    def _copy_evaluation_config(self, *, src_challenge, dest_challenge):\n        src_config = src_challenge.evaluation_config\n        dest_config = dest_challenge.evaluation_config\n\n        for attr in self.config_fields:\n            setattr(dest_config, attr, getattr(src_config, attr))\n\n        dest_config.save()\n\n    def _substitute_urls(self, html, domain, old, new):\n        quote_replace = r\"href='([^']*)'\"\n        regex = fr'href=\"[^/]*//{old}.{domain}([^\"\"]*)\"'\n        html = re.sub(quote_replace, r'href=\"\\1\"', html)\n        return re.sub(regex, fr'href=\"https://{new}.{domain}\\1\"', html,)\n\n    def _copy_pages(self, *, src_challenge, dest_challenge):\n        src_pages = src_challenge.page_set.all()\n\n        site = Site.objects.get_current()\n        domain = site.domain\n        old = src_challenge.short_name\n        new = dest_challenge.short_name\n\n        for src_page in src_pages:\n            Page.objects.create(\n                challenge=dest_challenge,\n                html=self._substitute_urls(src_page.html, domain, old, new),\n                **{f: getattr(src_page, f) for f in self.page_fields},\n            )\n\n    def _copy_admins(self, *, src_challenge, dest_challenge):\n        for u in src_challenge.get_admins():\n            dest_challenge.add_admin(u)\n", "path": "app/grandchallenge/challenges/management/commands/copy_challenge.py"}]}