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\documentclass[slidestop]{beamer}

\title{Introduction to Version Control}
\providecommand{\myConference}{Git course}
\providecommand{\myDate}{Monday, October 14, 2013}
\author{Jeroen F. J. Laros}
\providecommand{\myGroup}{Leiden Genome Technology Center}
\providecommand{\myDepartment}{Department of Human Genetics}
\providecommand{\myCenter}{Center for Human and Clinical Genetics}
\providecommand{\lastCenterLogo}{
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    \includegraphics[height=1cm]{lgtc_logo}
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\usetheme{lumc}

\begin{document}

% This disables the \pause command, handy in the editing phase.
%\renewcommand{\pause}{}

% Make the title page.
\bodytemplate

% First page of the presentation.
\section{Introduction}
\begin{frame}
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  \frametitle{Version control.}
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  \emph{The management of changes to documents, computer programs, large web
  sites, and other collections of information.} --- Wikipedia.
  \bigskip
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  \pause
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  General features:
  \begin{itemize}
    \item Keeping track of your files in an orderly manner.
    \begin{itemize}
      \item Hiding old versions.
      \item Recording who made changes and when.
    \end{itemize}
    \item Enables collaboration.
  \end{itemize}
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\end{frame}

\begin{frame}
  \frametitle{Why should I use it?}

  For a single user:
  \begin{itemize}
    \item Revert files to a previous state.
    \item Revert the entire project back to a previous state.
    \item Review changes made over time.
    \item Backup.
    \item \ldots
  \end{itemize}
  \bigskip
  \pause

  For multiple users:
  \begin{itemize}
    \item A reliable way to share files between people/computers.
    \item Allow multiple people working on the same project at the same time.
    \item Conflict resolution.
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    \item See who made which changes at which time.
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    \item \ldots
  \end{itemize}
\end{frame}

\begin{frame}
  \frametitle{Why should I not use it?}

  A list of common excuses:
  \begin{itemize}
    \item It is too much work.
    \item I have my own system.
    \item I am the only one working on this project.
    \item This code will not be used by anyone else.
    \item The bugs can be tracked forever.
    \item \ldots
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  \end{itemize}
  \bigskip
  \pause

  Eventually leading to:
  \begin{itemize}
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    \item I'm too busy rewriting the code I accidentally deleted.
  \end{itemize}
\end{frame}

\begin{frame}
  \frametitle{Local repository.}

  \begin{figure}[]
    \begin{center}
      \colorbox{white}{
        \hspace{0.5cm}
        \includegraphics[height=0.8\textheight]{pics/18333fig0101-tn}
        \hspace{0.5cm}
      }
    \end{center}
    \caption{Local version control diagram.}
    \label{}
  \end{figure}
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\end{frame}

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\begin{frame}
  \frametitle{Central repository.}
  
  \begin{figure}[]
    \begin{center}
      \colorbox{white}{
        \hspace{0.5cm}
        \includegraphics[height=0.8\textheight]{pics/18333fig0102-tn}
        \hspace{0.5cm}
      }
    \end{center}
    \caption{Centralised version control diagram.}
    \label{}
  \end{figure}
\end{frame}

\begin{frame}
  \frametitle{Distributed repositories.}

  \begin{figure}[]
    \begin{center}
      \colorbox{white}{
        \hspace{0.5cm}
        \includegraphics[height=0.8\textheight]{pics/18333fig0103-tn}
        \hspace{0.5cm}
      }
    \end{center}
    \caption{Distributed version control diagram.}
    \label{}
  \end{figure}
\end{frame}

\section{Git}
\begin{frame}
  \frametitle{The name.}

  \emph{Git (n): A person who is deemed to be despicable or contemptible.} ---
  WordNet.
  \bigskip
  \pause

  \emph{I'm an egotistical bastard, and I name all my projects after myself.
  First ``Linux'', now ``git''.} --- Linus Torvalds.
  \bigskip
\end{frame}

\begin{frame}
  \frametitle{History.}

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  Designed to replace the commercial package \emph{BitKeeper}.
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  \begin{itemize}
    \item Speed.
    \item Simple design.
    \item Strong support for non-linear development (thousands of parallel
      branches).
    \item Fully distributed.
    \item Able to handle large projects like the Linux kernel efficiently
      (speed and data size).
  \end{itemize}
\end{frame}

\section{Remotes}
\begin{fframe}
  \frametitle{A lot of choices.}

  GitHub.
  \begin{itemize}
    \item Only free for open source projects.
  \end{itemize}
  \bigskip

  SourceForge, BitBucket, Gitorious, \ldots
  \bigskip

  GitLab.
  \begin{itemize}
    \item Issue tracking.
    \item Wiki.
    \item ``Project wall''.
    \item Snippet.
    \item User profiles.
  \end{itemize}

  \vfill
  \permfoot{https://github.com/}
\end{fframe}

\section{Practical}
\begin{fframe}
  \frametitle{Outline.}

  We are going to:
  \begin{itemize}
    \item Create and configure a user account on the GitLab server.
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    \item Upload an \bt{ssh-key} to work with Git.
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  \end{itemize}
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  \bigskip

  Or alternatively, if you can not access the internal network:
  \begin{itemize}
    \item Use \bt{https} to work with GitLab.
  \end{itemize}
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  \vfill
  \permfoot{https://git.lumc.nl/}
\end{fframe}

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\section{Questions?}
\lastpagetemplate
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\begin{fframe}
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  \begin{center}
    Acknowledgements:
    \bigskip
    \bigskip

    Martijn Vermaat

    Zuotian Tatum

  \end{center}
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  \vfill
  \permfoot{https://humgenprojects.lumc.nl/trac/humgenprojects/wiki/git}
\end{fframe}
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\end{document}