% Renders a diagram from an existing PlantUML source file with \plantumlinput,
% analogous to \inputminted (minted) and \lstinputlisting (listings). See #3.
%
% The file is read relative to the current working directory; a path in a
% subdirectory (e.g. diagrams/foo.puml) works too when compiling from the
% project root. The file needs no @startuml/@enduml (PlantUML adds them; see #4).
\documentclass{scrartcl}
\usepackage{plantuml}
\begin{document}
\plantumlinput{example-input-file.puml}
\end{document}