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<!-- doc/src/sgml/sourcerepo.sgml -->
<appendix id="sourcerepo">
<title>The Source Code Repository</title>
<para>
The <productname>PostgreSQL</productname> source code is stored and managed
using the <productname>Git</productname> version control system. A public
mirror of the master repository is available; it is updated within a minute
of any change to the master repository.
</para>
<para>
Our wiki, <ulink
url="https://wiki.postgresql.org/wiki/Working_with_Git"></ulink>,
has some discussion on working with Git.
</para>
<para>
Note that building <productname>PostgreSQL</productname> from the source
repository requires reasonably up-to-date versions of <application>bison</application>,
<application>flex</application>, and <application>Perl</application>. These tools are not needed
to build from a distribution tarball, because the files that these tools
are used to build are included in the tarball. Other tool requirements
are the same as shown in <xref linkend="install-requirements"/>.
</para>
<sect1 id="git">
<title>Getting the Source via <productname>Git</productname></title>
<para>
With <productname>Git</productname> you will make a copy of the entire code repository
on your local machine, so you will have access to all history and branches
offline. This is the fastest and most flexible way to develop or test
patches.
</para>
<procedure>
<title>Git</title>
<step>
<para>
You will need an installed version of <productname>Git</productname>, which you can
get from <ulink url="https://git-scm.com"></ulink>. Many systems already
have a recent version of <application>Git</application> installed by default, or
available in their package distribution system.
</para>
</step>
<step>
<para>
To begin using the Git repository, make a clone of the official mirror:
<programlisting>
git clone https://git.postgresql.org/git/postgresql.git
</programlisting>
This will copy the full repository to your local machine, so it may take
a while to complete, especially if you have a slow Internet connection.
The files will be placed in a new subdirectory <filename>postgresql</filename> of
your current directory.
</para>
<para>
The Git mirror can also be reached via the Git protocol. Just change the URL
prefix to <literal>git</literal>, as in:
<programlisting>
git clone git://git.postgresql.org/git/postgresql.git
</programlisting>
</para>
</step>
<step>
<para>
Whenever you want to get the latest updates in the system, <command>cd</command>
into the repository, and run:
<programlisting>
git fetch
</programlisting>
</para>
</step>
</procedure>
<para>
<productname>Git</productname> can do a lot more things than just fetch the source. For
more information, consult the <productname>Git</productname> man pages, or see the
website at <ulink url="https://git-scm.com"></ulink>.
</para>
</sect1>
</appendix>
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