`{{url}}` helper shows incorrect url when subdirectory equals post slug

Issue Summary

If you create a post called /test/. And you switch to a subdirectory called /test/. Then the post should live at /test/test/, but the {{url}} helper displays /test/.

I am pretty sure it’s caused by the deduplicate sub dir helper function, see.

This bug must exist for a while (since we introduced this function).

To Reproduce

1. Create post with slug “test” (without subdirectory)
2. Switch to subdirectory /test/
3. Serve your blog and see that the post url is /test/

Solution

Write a test to proof this bug. Come up with an idea how to protect against this use case.

Technical details:

• Ghost Version: latest

[allouis]

@kirrg001 pull #9690 looks stale - I’m gonna pick this up 🛩️

[kirrg001]

@tiendq https://docs.ghost.org/docs/config#section-subpath - url configuration in your config file.