211 lines
7.2 KiB
XML
211 lines
7.2 KiB
XML
<chapter id='chap-installation'>
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<title>Installation</title>
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<sect1>
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<title>Obtaining Nix</title>
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<para>
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The easiest way to obtain Nix is to download a <ulink
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url='http://www.cs.uu.nl/groups/ST/Trace/Nix'>source
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distribution</ulink>. RPMs for SuSE and Red Hat are also
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available. These distributions are generated automatically.
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</para>
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<para>
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Alternatively, the most recent sources of Nix can be obtained from its
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<ulink url='https://svn.cs.uu.nl:12443/repos/trace/nix/trunk'>Subversion
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repository</ulink>. For example, the following command will check out
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the latest revision into a directory called <filename>nix</filename>:
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</para>
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<screen>
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$ svn checkout https://svn.cs.uu.nl:12443/repos/trace/nix/trunk nix</screen>
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<para>
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Likewise, specific releases can be obtained from the <ulink
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url='https://svn.cs.uu.nl:12443/repos/trace/nix/tags'>tags
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directory</ulink> of the repository. If you don't have Subversion, you
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can also download an automatically generated <ulink
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url='https://svn.cs.uu.nl:12443/dist/trace/'>compressed
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tar-file</ulink> of the head revision of the trunk.
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</para>
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</sect1>
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<sect1>
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<title>Prerequisites</title>
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<para>
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The following prerequisites only apply when you build from
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source. Binary releases (e.g., RPMs) have no prerequisites.
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</para>
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<para>
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A fairly recent version of GCC/G++ is required. Version 2.95
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and higher should work.
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</para>
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<para>
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To build this manual and the man-pages you need the
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<command>xmllint</command> and <command>xsltproc</command>
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programs, which are part of the <literal>libxml2</literal> and
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<literal>libxslt</literal> packages, respectively. You also
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need the <ulink
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url='http://docbook.sourceforge.net/projects/xsl/'>DocBook XSL
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stylesheets</ulink> and optionally the <ulink
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url='http://www.oasis-open.org/docbook/xml/4.2/docbook-xml-4.2.zip'>
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DocBook XML 4.2 DTD</ulink>. Note that these are only required
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if you modify the manual sources or when you are building from
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the Subversion repository.
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</para>
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<para>
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To build the parser, very <emphasis>recent</emphasis> versions
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of Bison and Flex are required. (This is because Nix needs GLR
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support in Bison and reentrancy support in Flex.) For Bison,
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you need version 1.875c or higher (1.875 does
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<emphasis>not</emphasis> work), which can be obtained from the
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<ulink url='ftp://alpha.gnu.org/pub/gnu/bison'>GNU FTP
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server</ulink>. For Flex, you need version 2.5.31, which is
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available on <ulink
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url='http://lex.sourceforge.net/'>SourceForge</ulink>. Slightly
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older versions may also work, but ancient versions like the
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ubiquitous 2.5.4a won't. Note that these are only required if
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you modify the parser or when you are building from the
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Subversion repository.
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</para>
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<para>
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Nix uses Sleepycat's Berkeley DB and CWI's ATerm library. These
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are included in the Nix source distribution. If you build from
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the Subversion repository, you must download them yourself and
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place them in the <filename>externals/</filename> directory.
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See <filename>externals/Makefile.am</filename> for the precise
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URLs of these packages.
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</para>
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</sect1>
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<sect1>
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<title>Building Nix from source</title>
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<para>
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After unpacking or checking out the Nix sources, issue the following
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commands:
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</para>
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<screen>
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$ ./configure <replaceable>options...</replaceable>
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$ make
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$ make install</screen>
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<para>
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When building from the Subversion repository, these should be preceded by
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the command:
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</para>
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<screen>
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$ autoreconf -i</screen>
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<para>
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The installation path can be specified by passing the
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<option>--prefix=<replaceable>prefix</replaceable></option> to
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<command>configure</command>. The default installation directory is
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<filename>/nix</filename>. You can change this to any location you like.
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You must have write permission to the <replaceable>prefix</replaceable>
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path.
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</para>
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<warning>
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<para>
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It is advisable <emphasis>not</emphasis> to change the installation
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prefix from its default, since doing so will in all likelihood make it
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impossible to use derivations built on other systems.
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</para>
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</warning>
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<para>
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If you want to rebuilt the documentation, pass the full path to the
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DocBook XML catalog file (<filename>docbook.cat</filename>) and to the
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DocBook XSL stylesheets using the
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<option>--with-docbook-catalog=<replaceable>path</replaceable></option>
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and <option>--with-docbook-xsl=<replaceable>path</replaceable></option>
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options.
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</para>
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</sect1>
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<sect1>
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<title>Installing from RPMs</title>
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<para>
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RPM packages of Nix can be downloaded from <ulink
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url='http://www.cs.uu.nl/groups/ST/Trace/Nix' />. These RPMs
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should work for most fairly recent releases of SuSE and Red Hat
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Linux. They have been known to work work on SuSE Linux 8.1 and
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9.0, and Red Hat 9.0. In fact, it should work on any RPM-based
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Linux distribution based on <literal>glibc</literal> 2.3 or
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later.
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</para>
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<para>
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Once downloaded, the RPMs can be installed or upgraded using
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<command>rpm -U</command>. For example,
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</para>
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<screen>
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rpm -U nix-0.5pre664-1.i386.rpm</screen>
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<para>
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The RPMs install into the directory <filename>/nix</filename>.
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Nix can be uninstalled using <command>rpm -e nix</command>.
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After this it will be necessary to manually remove the Nix store
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and other auxiliary data:
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</para>
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<screen>
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rm -rf /nix/store
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rm -rf /nix/var</screen>
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</sect1>
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<sect1>
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<title>Permissions</title>
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<para>
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All Nix operations must be performed under the user ID that owns
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the Nix store and database
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(<filename><replaceable>prefix</replaceable>/store</filename>
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and
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<filename><replaceable>prefix</replaceable>/var/nix/db</filename>,
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respectively). When installed from the RPM packages, these
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directories are owned by <systemitem
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class='username'>root</systemitem>.
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</para>
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</sect1>
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<sect1>
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<title>Using Nix</title>
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<para>
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To use Nix, some environment variables should be set. In
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particular, <envar>PATH</envar> should contain the directories
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<filename><replaceable>prefix</replaceable>/bin</filename> and
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<filename>~/.nix-userenv/bin</filename>. The first directory
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contains the Nix tools themselves, while
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<filename>~/.nix-userenv</filename> is a symbolic link to the
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current <emphasis>user environment</emphasis> (an automatically
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generated package consisting of symlinks to installed packages).
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The simplest way to set the required environment variables is to
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include the file
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<filename><replaceable>prefix</replaceable>/etc/profile.d/nix.sh</filename>
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in your <filename>~/.bashrc</filename> (or similar), like this:
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</para>
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<screen>
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. <replaceable>prefix</replaceable>/etc/profile.d/nix.sh</screen>
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</sect1>
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</chapter>
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