Create new flow step that defines local variables

[paulhoule]

Commonly a filename occurs two or three times in a flow because it as used as an output, then used as an input, and then we delete it if we don't need it anymore.

Repeating the code that generates filenames is asking for trouble, so it should be possible to make a step that writes a computed value into a local variable.

An easy way to implement local variables would be to add a Map<String,Object> to the context object, so you could write something like

local['tmpfile']

to access the value.