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1 \chapter{A lightning tour of Mercurial}
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2 \label{chap:tour}
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3
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4 \section{Installing Mercurial on your system}
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5 \label{sec:tour:install}
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6
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7 Prebuilt binary packages of Mercurial are available for every popular
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8 operating system. These make it easy to start using Mercurial on your
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9 computer immediately.
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10
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11 \subsection{Linux}
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12
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13 Because each Linux distribution has its own packaging tools, policies,
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14 and rate of development, it's difficult to give a comprehensive set of
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15 instructions on how to install Mercurial binaries. The version of
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16 Mercurial that you will end up with can vary depending on how active
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17 the person is who maintains the package for your distribution.
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18
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19 To keep things simple, I will focus on installing Mercurial from the
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20 command line under the most popular Linux distributions. Most of
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21 these distributions provide graphical package managers that will let
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22 you install Mercurial with a single click; the package name to look
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23 for is \texttt{mercurial}.
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24
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25 \begin{itemize}
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26 \item[Debian]
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27 \begin{codesample4}
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28 apt-get install mercurial
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29 \end{codesample4}
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30
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31 \item[Fedora Core]
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32 \begin{codesample4}
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33 yum install mercurial
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34 \end{codesample4}
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35
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36 \item[Gentoo]
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37 \begin{codesample4}
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38 emerge mercurial
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39 \end{codesample4}
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40
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41 \item[OpenSUSE]
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42 \begin{codesample4}
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43 yum install mercurial
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44 \end{codesample4}
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45
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46 \item[Ubuntu] Ubuntu's Mercurial package is particularly old, and you
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47 should not use it. If you know how, you can rebuild and install the
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48 Debian package. It's probably easier to build Mercurial from source
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49 and simply run that; see section~\ref{sec:srcinstall:unixlike} for
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50 details.
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51 \end{itemize}
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52
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53 \subsection{Mac OS X}
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54
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55 Lee Cantey publishes an installer of Mercurial for Mac OS~X at
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56 \url{http://mercurial.berkwood.com}. This package works on both
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57 Intel-~and Power-based Macs. Before you can use it, you must install
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58 a compatible version of Universal MacPython~\cite{web:macpython}. This
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59 is easy to do; simply follow the instructions on Lee's site.
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60
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61 \subsection{Solaris}
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62
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63 XXX.
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64
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65 \subsection{Windows}
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66
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67 Lee Cantey publishes an installer of Mercurial for Windows at
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68 \url{http://mercurial.berkwood.com}. This package has no external
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69 dependencies; it ``just works''.
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70
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71 \begin{note}
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72 The Windows version of Mercurial does not automatically convert line
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73 endings between Windows and Unix styles. If you want to share work
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74 with Unix users, you must do a little additional configuration
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75 work. XXX Flesh this out.
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76 \end{note}
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77
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78 \section{Getting started}
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79
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80 To begin, we'll use the \hgcmd{version} command to find out whether
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81 Mercurial is actually installed properly. The actual version
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82 information that it prints isn't so important; it's whether it prints
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83 anything at all that we care about.
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84 \interaction{tour.version}
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85
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86 \subsection{Built-in help}
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87
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88 Mercurial provides a built-in help system. This invaluable for those
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89 times when you find yourself stuck trying to remember how to run a
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90 command. If you are completely stuck, simply run \hgcmd{help}; it
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91 will print a brief list of commands, along with a description of what
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92 each does. If you ask for help on a specific command (as below), it
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93 prints more detailed information.
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94 \interaction{tour.help}
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95 For a more impressive level of detail (which you won't usually need)
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96 run \hgcmdargs{help}{\hggopt{-v}}. The \hggopt{-v} option is short
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97 for \hggopt{--verbose}, and tells Mercurial to print more information
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98 than it usually would.
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99
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100 \section{Working with a repository}
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101
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102 In Mercurial, everything happens inside a \emph{repository}. The
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103 repository for a project contains all of the files that ``belong to''
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104 that project, along with a historical record of the project's files.
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105
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106 There's nothing particularly magical about a repository; it is simply
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107 a directory tree in your filesystem that Mercurial treats as special.
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108 You can rename delete a repository any time you like, using either the
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109 command line or your file browser.
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110
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111 \subsection{Making a copy of a repository}
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112
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113 \emph{Copying} a repository is just a little bit special. While you
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114 could use a normal file copying command to make a copy of a
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115 repository, it's best to use a built-in command that Mercurial
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116 provides. This command is called \hgcmd{clone}, because it creates an
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117 identical copy of an existing repository.
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118 \interaction{tour.clone}
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119 If our clone succeeded, we should now have a local directory called
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120 \dirname{hello}. This directory will contain some files.
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121 \interaction{tour.ls}
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122 These files have the same contents and history in our repository as
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123 they do in the repository we cloned.
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124
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125 Every Mercurial repository is complete, self-contained, and
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126 independent. It contains its own private copy of a project's files
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127 and history. A cloned repository remembers the location of the
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128 repository it was cloned from, but it does not communicate with that
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129 repository, or any other, unless you tell it to.
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130
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131 What this means for now is that we're free to experiment with our
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132 repository, safe in the knowledge that it's a private ``sandbox'' that
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133 won't affect anyone else.
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134
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135 %%% Local Variables:
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136 %%% mode: latex
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137 %%% TeX-master: "00book"
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138 %%% End:
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