Ability to make groups visible to all users
Need to be able to share with groups without having full read access to the group.
New type of permission link that grants ability to see a group without traversing it
- Config option to make all 'role' groups visible without traversing them
Option 1 would allow us to generalize the annoying special case of read access on users (unlike groups, can_read on a user implies seeing the user but not traversing them).
Option 2 is simpler. It does require introducing a special case to the permission checks.
From discussion on Nov 23:
Consensus to do the easier solution (option 2).
New configuration option
When enabled, all Users are permitted to see role groups and share things with them.
Default value true, based on feedback, this is how users generally expect the system to work. Does not prevent us from supporting the a complex multi-tenant case (using option 1) in the future -- config option can be turned off.
Will be implemented by adding making role groups a special case within
Must have at least one non-anonymous, active user in the list of users passed to