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1.2. Apache Subversion (SVN)
Apache Subversion, commonly abbreviated as SVN, is a centralized version control system with a client-server architecture. It is a successor to the older Concurrent Versions System (CVS), preserves the same development model, and addresses problems often encountered with CVS.
1.2.1. Installing and Configuring Subversion
Installing the subversion Package
In Red Hat Enterprise Linux 6, Subversion is provided by the subversion package. To install the subversion package and all its dependencies on your system, type the following at a shell prompt as
root:
yuminstallsubversion
This installs a command line Subversion client, a Subversion server, and other related tools to the system.
Setting Up the Default Editor
When using Subversion on the command line, certain commands such as
svn import or svn commit require the user to write a short log message. To determine which text editor to start, the svn client application first reads the contents of the environment variable $SVN_EDITOR, then reads more general environment variables $VISUAL and $EDITOR, and if none of these is set, it reports an error.
To persistently change the value of the
$SVN_EDITOR environment variable, run the following command:
echo"exportSVN_EDITOR=command" >>~/.bashrc
This adds the
export SVN_EDITOR=command line to your ~/.bashrc file. Replace command with a command that runs the editor of your choice (for example, emacs). Note that for this change to take effect in the current shell session, you must execute the commands in ~/.bashrc by typing the following at a shell prompt:
.~/.bashrc
Example 1.3. Setting up the default text editor
To configure the Subversion client to use Emacs as a text editor, type:
~]$echo "export SVN_EDITOR=emacs" >> ~/.bashrc~]$. ~/.bashrc
