How to get complete parent directories tree via SVN Path Based Authorization

Question

I have following folders in SVN repository marketing:

/marketing/event1/pictures
/marketing/event2/pictures
...
/marketing/eventn/pictures

I have authorization configurations:

[groups]
head = user1, user2
visuals = user3, user4
[/]
* =
[marketing:/]
@head = rw
[marketing:/marketing/event1/pictures]
@visuals = rw
[marketing:/marketing/event2/pictures]
@visuals = rw
...

It is working in case the visuals group to checkout all pictures folders one by one. It is annoying if the sub folders become more.

The ideal solution is to let visuals group checking out /marketing/ once, get all sub folders tree excluding the files that visuals group has no right to read from. But there is authorization mistake while visuals checkout the /marketing/ from SVN.

Answer 1

Really "Ideal Solution" (tm) will be

1. Read about SVN extenals
2. Build a) additional b) self-maintained tree of "Data for Visuals"

because your solution is possible even now, but expect (will require) something like

[/]
* =
[marketing:/]
@head = rw
@visuals = r
[marketing:/file1]
@visuals =
[marketing:/file2]
@visuals =
[marketing:/file3]
@visuals =
...

for each and every file inside "restricted" tree, whereas the use of externals will produce "one added line in property per added folder"