2006-08-21 16:05:11 +00:00
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<refentry xmlns="http://docbook.org/ns/docbook"
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xmlns:xlink="http://www.w3.org/1999/xlink">
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2005-04-09 17:16:00 +00:00
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<refnamediv>
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<refname>nix-channel</refname>
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<refpurpose>manage Nix channels</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>nix-channel</command>
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<group choice='req'>
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<arg choice='plain'><option>--add</option> <replaceable>url</replaceable></arg>
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<arg choice='plain'><option>--remove</option> <replaceable>url</replaceable></arg>
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<arg choice='plain'><option>--list</option></arg>
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<arg choice='plain'><option>--update</option></arg>
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</group>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsection><title>Description</title>
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<para>A Nix channel is mechanism that allows you to automatically stay
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up-to-date with a set of pre-built Nix expressions. A Nix channel is
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just a URL that points to a place that contains a set of Nix
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expressions, as well as a <command>nix-push</command> manifest. See
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also <xref linkend="sec-channels" />.</para>
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<para>This command has the following operations:
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<variablelist>
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<varlistentry><term><option>--add</option> <replaceable>url</replaceable></term>
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<listitem><para>Adds <replaceable>url</replaceable> to the list of
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subscribed channels.</para></listitem>
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</varlistentry>
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<varlistentry><term><option>--remove</option> <replaceable>url</replaceable></term>
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<listitem><para>Removes <replaceable>url</replaceable> from the
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list of subscribed channels.</para></listitem>
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</varlistentry>
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<varlistentry><term><option>--list</option></term>
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<listitem><para>Prints the URLs of all subscribed channels on
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standard output.</para></listitem>
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</varlistentry>
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<varlistentry><term><option>--update</option></term>
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<listitem><para>Downloads the Nix expressions of all subscribed
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channels, makes the conjunction of these the default for
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<command>nix-env</command> operations (by calling <command>nix-env
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-I</command>), and performs a <command>nix-pull</command> on the
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manifests of all channels to make pre-built binaries
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available.</para></listitem>
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</varlistentry>
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</variablelist>
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</para>
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<para>Note that <option>--add</option> and <option>--remove</option>
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do not automatically perform an update.</para>
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<para>The list of subscribed channels is stored in
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<filename>~/.nix-channels</filename>.</para>
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<para>A channel consists of two elements: a bzipped Tar archive
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containing the Nix expressions, and a manifest created by
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<command>nix-push</command>. These must be stored under
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<literal><replaceable>url</replaceable>/nixexprs.tar.bz2</literal> and
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<literal><replaceable>url</replaceable>/MANIFEST</literal>,
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respectively.</para>
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</refsection>
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</refentry>
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