Deploy without Building

[corinz]

Is it possible to fass-cli deploy without building first? I'm failing to see why the build dir is necessary for the deploy function. Especially if the container has already been pushed, all we really need is the function metadata and the image url, no?

Expected Behaviour

fass-cli deploy should execute with stack.yml alone -- with no guarantees

Current Behaviour

fass-cli deploy requires a build directory

Can't separate the deploy of the function from the build of the functions.