167 lines
4.7 KiB
XML
167 lines
4.7 KiB
XML
<refentry>
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<refnamediv>
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<refname>nix-env</refname>
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<refpurpose>manipulate or query Nix user environments</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>nix-env</command>
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<group choice='opt' rep='repeat'>
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<arg><option>--verbose</option></arg>
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<arg><option>-v</option></arg>
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</group>
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<group choice='opt'>
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<arg><option>--keep-failed</option></arg>
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<arg><option>-K</option></arg>
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</group>
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<arg>
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<group choice='opt'>
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<arg><option>--file</option></arg>
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<arg><option>-f</option></arg>
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</group>
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<replaceable>path</replaceable>
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</arg>
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<arg choice='plain'><replaceable>operation</replaceable></arg>
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<arg rep='repeat'><replaceable>options</replaceable></arg>
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<arg rep='repeat'><replaceable>arguments</replaceable></arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsection>
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<title>Description</title>
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<para>
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The command <command>nix-env</command> is used to manipulate Nix
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user environments. User environments are sets of software
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components available to a user at some point in time. In other
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words, they are a synthesised view of the programs available in
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the Nix store. There may be many user environments: different
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users can have different environments, and individual users can
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switch between different environments.
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</para>
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<!-- <para>
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Environments are manipulated by operations such as the
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installation and removal of components (hereafter called
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<emphasis>derivations</emphasis>). These operations are not
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destructive: rather than overwrite the current environment, they
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create a new environment to which we can then atomically
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<emphasis>switch</emphasis> by flipping a symlink.
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</para> -->
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<para>
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<command>nix-env</command> takes exactly one
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<emphasis>operation</emphasis> flag which indicates the
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subcommand to be performed. These are documented below.
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</para>
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</refsection>
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<!--######################################################################-->
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<refsection>
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<title>Common options</title>
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<para>
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This section lists the options that are common to all
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operations. These options are allowed for every subcommand,
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though they may not always have an effect.
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</para>
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<variablelist>
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&opt-verbose;
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<varlistentry>
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<term><option>--file</option></term>
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<listitem>
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<para>
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Specifies the Nix expression used by the
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<option>--install</option>, <option>--upgrade</option>,
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and <option>--query --available</option> operations to
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obtain derivations. The default is
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<filename>~/.nix-defexpr</filename>.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsection>
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<!--######################################################################-->
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<refsection>
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<title>Files</title>
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<variablelist>
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<varlistentry>
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<term><filename>~/.nix-defexpr</filename></term>
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<listitem>
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<para>
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The default Nix expression used by the
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<option>--install</option>, <option>--upgrade</option>,
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and <option>--query --available</option> operations to
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obtain derivations. It is generally a symbolic link to
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some other location set using the
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<option>--import</option> operation. The
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<option>--file</option> option may be used to override
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this default.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><filename>~/.nix-userenv</filename></term>
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<listitem>
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<para>
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A symbolic link to the user's current user environment.
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By default, it points to
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<filename><replaceable>prefix</replaceable>/var/nix/links/current</filename>.
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The <envar>PATH</envar> environment variable should
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include <filename>~/.nix-userenv</filename> for the use
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environments to be visible to the user.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsection>
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<!--######################################################################-->
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<refsection>
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<title>Operation <option>--install</option></title>
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<refsection>
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<title>Synopsis</title>
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<cmdsynopsis>
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<command>nix-env</command>
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<group>
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<arg><option>--install</option></arg>
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</group>
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</cmdsynopsis>
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</refsection>
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<refsection>
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<title>Description</title>
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<para>
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</para>
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</refsection>
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</refsection>
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</refentry>
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