\begin{frame}[fragile]{Importing a Code Drop}
  Mercurial can help you:
\begin{lstlisting}
$ rm -r lib/libfoo
$ unzip libfoo-2.0.zip -d lib/libfoo
$ hg status
M lib/libfoo/a.txt
! lib/libfoo/b.txt
? lib/libfoo/c.txt
\end{lstlisting}

\pause

Question: has \ext{b.txt} been renamed to \ext{c.txt}?
\begin{lstlisting}
$ hg addremove --similarity 90
removing b.txt
adding c.txt
recording removal of b.txt as rename to c.txt (94% similar)
\end{lstlisting}
\end{frame}