\input regression-test.tex
\documentclass{article}
\usepackage{tagdirtree}
\begin{document}
\START

\begin{tagdirtree}
  \dtdir{project}{root directory}{
    \dtdir{empty}{}{}
    \dtdir{src}{}{
      \dtfile{main.py}{entry point}
    }
    \dtarchive{data.zip}{raw data}
    \dtfile{README.md}{}
  }
\end{tagdirtree}

\TYPE{depth after tree: \tagdirtreedepth}
\TYPE{done}
\END