render gv schematic only if Graphviz is not installed

vicelab / cen-sierra-pywr

Code base for modeling the central Sierra Nevada hydropower systems

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Closed drheinheimer closed 3 years ago

drheinheimer commented 3 years ago

The title says it all: if Graphviz is not installed, then only text-based Graphviz files will be created for schematics when running in debug mode.