* Documented new nix-env options.
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Eelco Dolstra
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@ -109,7 +109,12 @@ linkend="sec-common-options" />.</para>
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<option>--rollback</option> operations, this flag will cause
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<command>nix-env</command> to print what
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<emphasis>would</emphasis> be done if this flag had not been
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specified, without actually doing it.</para></listitem>
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specified, without actually doing it.</para>
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<para><option>--dry-run</option> also prints out which paths will
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be <link linkend="gloss-substitute">substituted</link> (i.e.,
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downloaded) and which paths will be built from source (because no
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substitute is available).</para></listitem>
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</varlistentry>
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@ -205,6 +210,14 @@ number of possible ways:
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<option>--preserve-installed</option> is
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specified.</para></listitem>
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<listitem><para>If <link
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linkend='opt-attr'><option>--attr</option></link>
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(<option>-A</option>) is specified, the arguments are
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<emphasis>attribute paths</emphasis> that select attributes from the
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top-level Nix expression. This is faster than using derivation
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names and unambiguous. To find out the attribute paths of available
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packages, use <literal>nix-env -qaA '*'</literal>.</para></listitem>
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<listitem><para>If <option>--from-profile</option>
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<replaceable>path</replaceable> is given,
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<replaceable>args</replaceable> is a set of names denoting installed
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@ -280,6 +293,14 @@ installing `gcc-3.3.2'</screen>
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</para>
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<para>To install using a specific attribute:
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<screen>
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$ nix-env -i -A gcc40mips
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$ nix-env -i -A xorg.xorgserver</screen>
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</para>
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<para>To install all derivations in the Nix expression <filename>foo.nix</filename>:
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<screen>
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@ -322,6 +343,25 @@ selecting the <literal>subversionWithJava</literal> attribute from the
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attribute set returned by calling the function defined in
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<filename>./foo.nix</filename>.</para>
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<para>A dry-run tells you which paths will be downloaded or built from
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source:
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<screen>
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$ nix-env -f pkgs/top-level/all-packages.nix -i f-spot --dry-run
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(dry run; not doing anything)
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installing `f-spot-0.0.10'
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the following derivations will be built:
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/nix/store/0g63jv9aagwbgci4nnzs2dkxqz84kdja-libgnomeprintui-2.12.1.tar.bz2.drv
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/nix/store/0gfarvxq6sannsdw8a1ir40j1ys2mqb4-ORBit2-2.14.2.tar.bz2.drv
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/nix/store/0i9gs5zc04668qiy60ga2rc16abkj7g8-sqlite-2.8.17.drv
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<replaceable>...</replaceable>
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the following paths will be substituted:
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/nix/store/8zbipvm4gp9jfqh9nnk1n3bary1a37gs-perl-XML-Parser-2.34
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/nix/store/b8a2bg7gnyvvvjjibp4axg9x1hzkw36c-mono-1.1.4
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<replaceable>...</replaceable></screen>
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</para>
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</refsection>
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</refsection>
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@ -343,6 +383,7 @@ attribute set returned by calling the function defined in
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<group choice='opt'>
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<arg choice='plain'><option>--lt</option></arg>
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<arg choice='plain'><option>--leq</option></arg>
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<arg choice='plain'><option>--eq</option></arg>
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<arg choice='plain'><option>--always</option></arg>
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</group>
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<arg choice='plain' rep='repeat'><replaceable>args</replaceable></arg>
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@ -391,6 +432,17 @@ installed.</para>
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</varlistentry>
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<varlistentry><term><option>--eq</option></term>
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<listitem><para><emphasis>Only</emphasis> “upgrade” to derivations
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that have the same version. This may not seem very useful, but it
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actually is, e.g., when there is a new release of Nixpkgs and you
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want to replace installed applications with the same versions
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built against newer dependencies (to reduce the number of
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dependencies floating around on your system).</para></listitem>
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</varlistentry>
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<varlistentry><term><option>--always</option></term>
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<listitem><para>In addition to upgrading to newer versions, also
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@ -523,21 +575,37 @@ $ nix-env -e '*' <lineannotation>(remove everything)</lineannotation></screen>
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<arg choice='plain'><option>--query</option></arg>
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<arg choice='plain'><option>-q</option></arg>
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</group>
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<arg><option>--xml</option></arg>
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<group choice='opt'>
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<arg choice='plain'><option>--installed</option></arg>
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<arg choice='plain'><option>--available</option></arg>
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<arg choice='plain'><option>-a</option></arg>
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</group>
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<sbr />
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<arg>
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<group choice='req'>
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<arg choice='plain'><option>--status</option></arg>
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<arg choice='plain'><option>-s</option></arg>
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<arg choice='plain'><option>--no-name</option></arg>
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</group>
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</arg>
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<arg>
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<group choice='req'>
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<arg choice='plain'><option>--attr</option></arg>
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<arg choice='plain'><option>-A</option></arg>
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</group>
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</arg>
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<arg><option>--no-name</option></arg>
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<arg>
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<group choice='req'>
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<arg choice='plain'><option>--compare-versions</option></arg>
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<arg choice='plain'><option>-c</option></arg>
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<arg choice='plain'><option>--system</option></arg>
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<arg choice='plain'><option>--drv-path</option></arg>
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<arg choice='plain'><option>--out-path</option></arg>
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</group>
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</arg>
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<arg><option>--system</option></arg>
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<arg><option>--drv-path</option></arg>
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<arg><option>--out-path</option></arg>
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<arg><option>--description</option></arg>
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<arg choice='plain' rep='repeat'><replaceable>names</replaceable></arg>
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</cmdsynopsis>
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</refsection>
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@ -549,7 +617,10 @@ $ nix-env -e '*' <lineannotation>(remove everything)</lineannotation></screen>
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paths that are installed in the current generation of the active
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profile (<option>--installed</option>), or the derivations that are
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available for installation in the active Nix expression
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(<option>--available</option>).</para>
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(<option>--available</option>). It only prints information about
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derivations whose symbolic name matches one of
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<replaceable>names</replaceable>. The wildcard <literal>*</literal>
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shows all derivations.</para>
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<para>The derivations are sorted by their <literal>name</literal>
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attributes.</para>
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@ -598,6 +669,18 @@ user environment elements, etc. -->
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<variablelist>
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<varlistentry><term><option>--xml</option></term>
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<listitem><para>Print the result in an XML representation suitable
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for automatic processing by other tools. The root element is
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called <literal>items</literal>, which contains a
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<literal>item</literal> element for each available or installed
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derivation. The fields discussed below are all stored in
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attributes of the <literal>item</literal>
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elements.</para></listitem>
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</varlistentry>
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<varlistentry><term><option>--status</option></term>
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<term><option>-s</option></term>
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@ -617,6 +700,17 @@ user environment elements, etc. -->
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</varlistentry>
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<varlistentry><term><option>--attr</option></term>
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<term><option>-a</option></term>
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<listitem><para>Print the <emphasis>attribute path</emphasis> of
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the derivation, which can be used to unambiguously select it using
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the <link linkend="opt-attr"><option>--attr</option> option</link>
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available in commands that install derivations like
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<literal>nix-env --install</literal>.</para></listitem>
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</varlistentry>
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<varlistentry><term><option>--no-name</option></term>
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<listitem><para>Suppress printing of the <literal>name</literal>
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@ -690,6 +784,15 @@ user environment elements, etc. -->
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</varlistentry>
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<varlistentry><term><option>--description</option></term>
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<listitem><para>Print a short (one-line) description of the
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derivation, if available. The description is taken from the
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<literal>meta.description</literal> attribute of the
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derivation.</para></listitem>
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</varlistentry>
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</variablelist>
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</refsection>
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@ -698,7 +801,7 @@ user environment elements, etc. -->
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<refsection><title>Examples</title>
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<screen>
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$ nix-env -q <lineannotation>(show installed derivations)</lineannotation>
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$ nix-env -q '*' <lineannotation>(show installed derivations)</lineannotation>
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bison-1.875c
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docbook-xml-4.2
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firefox-1.0.4
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@ -706,30 +809,39 @@ MPlayer-1.0pre7
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ORBit2-2.8.3
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...
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$ nix-env -qa <lineannotation>(show available derivations)</lineannotation>
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$ nix-env -qa '*' <lineannotation>(show available derivations)</lineannotation>
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firefox-1.0.7
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GConf-2.4.0.1
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MPlayer-1.0pre7
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ORBit2-2.8.3
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...
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$ nix-env -qas <lineannotation>(show status of available derivations)</lineannotation>
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$ nix-env -qas '*' <lineannotation>(show status of available derivations)</lineannotation>
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-P- firefox-1.0.7 <lineannotation>(not installed but present)</lineannotation>
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--S GConf-2.4.0.1 <lineannotation>(not present, but there is a substitute for fast installation)</lineannotation>
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--S MPlayer-1.0pre3 <lineannotation>(i.e., this is not the installed MPlayer, even though the version is the same!)</lineannotation>
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IP- ORBit2-2.8.3 <lineannotation>(installed and by definition present)</lineannotation>
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...
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$ nix-env -f ./foo.nix -qa <lineannotation>(show available derivations in the Nix expression <!-- !!! <filename>-->foo.nix<!-- </filename> -->)</lineannotation>
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<lineannotation>(show available derivations in the Nix expression <!-- !!! <filename>-->foo.nix<!-- </filename> -->)</lineannotation>
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$ nix-env -f ./foo.nix -qa '*'
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foo-1.2.3
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$ nix-env -qc <lineannotation>(compare installed versions to what’s available)</lineannotation>
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$ nix-env -qc '*' <lineannotation>(compare installed versions to what’s available)</lineannotation>
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<replaceable>...</replaceable>
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acrobat-reader-7.0 - ? <lineannotation>(package is not available at all)</lineannotation>
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autoconf-2.59 = 2.59 <lineannotation>(same version)</lineannotation>
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firefox-1.0.4 < 1.0.7 <lineannotation>(a more recent version is available)</lineannotation>
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<replaceable>...</replaceable>
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</screen>
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<lineannotation>(show info about a specific package, in XML)</lineannotation>
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$ nix-env -qa --xml --description firefox
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<![CDATA[<?xml version='1.0' encoding='utf-8'?>
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<items>
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<item attrPath="0.0.firefoxWrapper"
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description="Mozilla Firefox - the browser, reloaded (with various plugins)"
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name="firefox-1.5.0.7" system="i686-linux" />
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</items>]]></screen>
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</refsection>
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