Do not override None with empty string #950
Merged
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This is a partial solution to #946; it addresses the IOError.
The cause for the error is described here: #946 (comment)
The edits prevent planemo from passing an empty string as the value of
data_manager_config_file
to the managed galaxy instance as part of kwargs. An empty string was resolved to the current directory and, due to stricter exception handling in galaxy (introduced in galaxyproject/galaxy#921) that caused an error.This should work correctly for both cases, when a path exists (when it's a data manager) and when it doesn't ( when it's a regular tool or a directory).
Ping @jmchilton , @natefoo . (I am not at all sure this is the optimal solution here, but it's my best guess, for now.)