Add a shortlink for projects (#3165)

To make it easier for people who want to type project URLs, this will
redirect all requests for `/p/<project>/` to `/project/<project>/`.

Closes #3143

Signed-off-by: Andy Dirnberger <[email protected]>

Author: dirn

tests/unit/test_routes.py

@@ -269,6 +269,7 @@ def add_policy(name, filename):
     ]
 
     assert config.add_redirect.calls == [
+        pretend.call("/p/{name}/", "/project/{name}/", domain=warehouse),
         pretend.call("/pypi/{name}/", "/project/{name}/", domain=warehouse),
         pretend.call(
             "/pypi/{name}/{version}/",

warehouse/routes.py

@@ -178,6 +178,7 @@ def includeme(config):
     )
 
     # Packaging
+    config.add_redirect('/p/{name}/', '/project/{name}/', domain=warehouse)
     config.add_route(
         "packaging.project",
         "/project/{name}/",