[Downloader] Add Repo.clean_url and use it in [p]findcog (#3129)

* enhance(downloader): add `Repo.clean_url` and use it in `[p]findcog`

* chore(changelog): add towncrier entries

changelog.d/downloader/3129.enhance.rst

@@ -0,0 +1 @@
+Use sanitized url (without HTTP Basic Auth fragments) in `[p]findcog` command.

changelog.d/downloader/3129.misc.rst

@@ -0,0 +1 @@
+Add `clean_url` property to :class:`redbot.cogs.downloader.repo_manager.Repo` which contains sanitized repo URL (without HTTP Basic Auth).

redbot/cogs/downloader/downloader.py

@@ -1150,7 +1150,7 @@ class Downloader(commands.Cog):
             repo_url = (
                 _("Missing from installed repos")
                 if cog_installable.repo is None
-                else cog_installable.repo.url
+                else cog_installable.repo.clean_url
             )
             cog_name = cog_installable.name
         else:

redbot/cogs/downloader/repo_manager.py

@@ -7,6 +7,7 @@ import pkgutil
 import shlex
 import shutil
 import re
+import yarl
 from concurrent.futures import ThreadPoolExecutor
 from pathlib import Path
 from subprocess import run as sp_run, PIPE, CompletedProcess
@@ -147,6 +148,13 @@ class Repo(RepoJSONMixin):
 
         self._loop = loop if loop is not None else asyncio.get_event_loop()
 
+    @property
+    def clean_url(self):
+        """Sanitized repo URL (with removed HTTP Basic Auth)"""
+        url = yarl.URL(self.url)
+        clean_url = url.with_user(None)
+        return clean_url
+
     @classmethod
     async def convert(cls, ctx: commands.Context, argument: str) -> Repo:
         downloader_cog = ctx.bot.get_cog("Downloader")