I'm looking for a way to call a single Capistrano task to perform different things to different roles. Is Capistrano able to do this, or do I have write a specific task for each role?
The standard way to do this in Capistrano:
task :whatever, :roles => [:x, :y, :z] do
x_tasks
y_tasks
z_tasks
end
task :x_tasks, :roles => :x do
#...
end
task :y_tasks, :roles => :y do
#...
end
task :z_tasks, :roles => :z do
#...
end
So yes, you do need to write separate tasks, but you can call them from a parent task and they will filter appropriately.