core: pkgrepo: support arbitrarily named pmaports directories

There was an oversight when this API was originally created and it implicitly assumed that the pmaports repository was always named "pmaports". This unfortunately broke some peoples workflows.

Introduce a new "pkgrepo_name()" function and adjust the codebase to use it, as well as adjusting pkgrepo internally to special case the "pmaports" repo so that it's always named pmaports no matter what the directory itself is named.

This is probably more complexity than we should be dealing with here, we should probably create a new type to encode this behaviour.

---

In addition, fix calling pmbootstrap init with --work which would half-work before, but you'd need to enter the new workdir a second time.

Fixes: #2412 (closed) Fixes: #2386 (closed)

pmb/core/pkgrepo.py

@@ -50,7 +50,7 @@ def pkgrepo_name(path: Path) -> str:
     MUST be used instead of "path.name" as we need special handling
     for the pmaports repository.
     """
-    if path == pkgrepo_paths()[-1]:
+    if path == get_context().config.aports[-1]:
         return "pmaports"
 
     return path.name
@@ -62,7 +62,7 @@ def pkgrepo_path(name: str) -> Path:
     """
     # The pmaports repo is always last, and we hardcode the name.
     if name == "pmaports":
-        return pkgrepo_paths()[-1]
+        return get_context().config.aports[-1]
 
     for aports in pkgrepo_paths():
         if aports.name == name: