I have 3 drush-aliased sites: @DEV, @STAGE & @PROD
rsync & sql-sync all work between them. At the moment, that's both directions, between any two sites.
I want to limit the sync paths to only allow sync in the following cases:
- (1) @DEV -> @STAGE, files & db
- (2) @STAGE -> @PROD, files & db
- (3) @PROD -> @DEV, db ONLY
How do I limit drush sync to allow only those three cases of sync, preventing all others?