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Peter Simons 2011-12-01 08:02:37 +00:00
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doc/manual/nix-env.xml
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@ -2,7 +2,7 @@
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xi="http://www.w3.org/2001/XInclude"
xml:id="sec-nix-env">
<refmeta>
<refentrytitle>nix-env</refentrytitle>
<manvolnum>1</manvolnum>
@ -60,7 +60,7 @@ environments.</para>
<para><command>nix-env</command> takes exactly one
<emphasis>operation</emphasis> flag which indicates the subcommand to
be performed. These are documented below.</para>
</refsection>
@ -78,19 +78,19 @@ linkend="sec-common-options" />.</para>
<varlistentry><term><option>--file</option></term>
<term><option>-f</option></term>
<listitem><para>Specifies the Nix expression (designated below as
the <emphasis>active Nix expression</emphasis>) used by the
<option>--install</option>, <option>--upgrade</option>, and
<option>--query --available</option> operations to obtain
derivations. The default is
<filename>~/.nix-defexpr</filename>.</para></listitem>
</varlistentry>
<varlistentry><term><option>--profile</option></term>
<term><option>-p</option></term>
<listitem><para>Specifies the profile to be used by those
operations that operate on a profile (designated below as the
<emphasis>active profile</emphasis>). A profile is sequence of
@ -98,11 +98,11 @@ linkend="sec-common-options" />.</para>
which is the <emphasis>current generation</emphasis>. The default
profile is the target of the symbolic link
<filename>~/.nix-profile</filename> (see below).</para></listitem>
</varlistentry>
<varlistentry><term><option>--dry-run</option></term>
<listitem><para>For the <option>--install</option>,
<option>--upgrade</option>, <option>--uninstall</option>,
<option>--switch-generation</option> and
@ -117,23 +117,23 @@ linkend="sec-common-options" />.</para>
substitute is available).</para></listitem>
</varlistentry>
<varlistentry><term><option>--system-filter</option> <replaceable>system</replaceable></term>
<listitem><para>By default, operations such as <option>--query
--available</option> only include derivations matching the current
platform. This option allows you to use derivations for the
specified platform <replaceable>system</replaceable>. The special
value <literal>*</literal> causes derivations for any platform to
be included.</para></listitem>
</varlistentry>
</variablelist>
</refsection>
<!--######################################################################-->
@ -170,25 +170,25 @@ linkend="sec-common-options" />.</para>
this directory.</para>
</listitem>
</varlistentry>
<varlistentry><term><filename>~/.nix-profile</filename></term>
<listitem><para>A symbolic link to the user's current profile. By
default, this symlink points to
<filename><replaceable>prefix</replaceable>/var/nix/profiles/default</filename>.
The <envar>PATH</envar> environment variable should include
<filename>~/.nix-profile/bin</filename> for the user environment
to be visible to the user.</para></listitem>
</varlistentry>
</variablelist>
</refsection>
<!--######################################################################-->
@ -214,7 +214,7 @@ linkend="sec-common-options" />.</para>
<refsection><title>Description</title>
<para>The install operation creates a new user environment, based on
the current generation of the active profile, to which a set of store
paths described by <replaceable>args</replaceable> is added. The
@ -306,20 +306,20 @@ number of possible ways:
<varlistentry><term><option>--preserve-installed</option></term>
<term><option>-P</option></term>
<listitem><para>Do not remove derivations with a name matching one
of the derivations being installed. Usually, trying to have two
versions of the same package installed in the same generation of a
profile will lead to an error in building the generation, due to
file name clashes between the two versions. However, this is not
the case for all packages.</para></listitem>
</varlistentry>
</variablelist>
</refsection>
<refsection xml:id='refsec-nix-env-install-examples'><title>Examples</title>
@ -327,7 +327,7 @@ number of possible ways:
active Nix expression:
<screen>
$ nix-env --install gcc-3.3.2
$ nix-env --install gcc-3.3.2
installing `gcc-3.3.2'
uninstalling `gcc-3.1'</screen>
@ -408,15 +408,15 @@ the following paths will be substituted:
/nix/store/8zbipvm4gp9jfqh9nnk1n3bary1a37gs-perl-XML-Parser-2.34
/nix/store/b8a2bg7gnyvvvjjibp4axg9x1hzkw36c-mono-1.1.4
<replaceable>...</replaceable></screen>
</para>
</refsection>
</refsection>
<!--######################################################################-->
<refsection xml:id="rsec-nix-env-upgrade"><title>Operation <option>--upgrade</option></title>
@ -442,7 +442,7 @@ the following paths will be substituted:
</refsection>
<refsection><title>Description</title>
<para>The upgrade operation creates a new user environment, based on
the current generation of the active profile, in which all store paths
are replaced for which there are newer versions in the set of paths
@ -459,47 +459,47 @@ the same symbolic name, only the one with the highest version is
installed.</para>
</refsection>
<refsection><title>Flags</title>
<variablelist>
<varlistentry><term><option>--lt</option></term>
<listitem><para>Only upgrade a derivation to newer versions. This
is the default.</para></listitem>
</varlistentry>
<varlistentry><term><option>--leq</option></term>
<listitem><para>In addition to upgrading to newer versions, also
“upgrade” to derivations that have the same version. Version are
not a unique identification of a derivation, so there may be many
derivations that have the same version. This flag may be useful
to force “synchronisation” between the installed and available
derivations.</para></listitem>
</varlistentry>
<varlistentry><term><option>--eq</option></term>
<listitem><para><emphasis>Only</emphasis> “upgrade” to derivations
that have the same version. This may not seem very useful, but it
actually is, e.g., when there is a new release of Nixpkgs and you
want to replace installed applications with the same versions
built against newer dependencies (to reduce the number of
dependencies floating around on your system).</para></listitem>
</varlistentry>
<varlistentry><term><option>--always</option></term>
<listitem><para>In addition to upgrading to newer versions, also
“upgrade” to derivations that have the same or a lower version.
I.e., derivations may actually be downgraded depending on what is
available in the active Nix expression.</para></listitem>
</varlistentry>
</variablelist>
@ -523,10 +523,10 @@ $ nix-env --upgrade pan
$ nix-env -u '*' <lineannotation>(try to upgrade everything)</lineannotation>
upgrading `hello-2.1.2' to `hello-2.1.3'
upgrading `mozilla-1.2' to `mozilla-1.4'</screen>
upgrading `mozilla-1.2' to `mozilla-1.4'</screen>
</refsection>
<refsection xml:id="ssec-version-comparisons"><title>Versions</title>
<para>The upgrade operation determines whether a derivation
@ -570,14 +570,14 @@ lexicographically (i.e., using case-sensitive string comparison).</para>
2.3a &lt; 2.3c
2.3pre1 &lt; 2.3c
2.3pre1 &lt; 2.3q</screen>
</para>
</refsection>
</refsection>
<!--######################################################################-->
@ -596,14 +596,14 @@ lexicographically (i.e., using case-sensitive string comparison).</para>
</refsection>
<refsection><title>Description</title>
<para>The uninstall operation creates a new user environment, based on
the current generation of the active profile, from which the store
paths designated by the symbolic names
<replaceable>names</replaceable> are removed.</para>
</refsection>
<refsection><title>Examples</title>
<screen>
@ -611,11 +611,11 @@ $ nix-env --uninstall gcc
$ nix-env -e '*' <lineannotation>(remove everything)</lineannotation></screen>
</refsection>
</refsection>
<!--######################################################################-->
<refsection xml:id="rsec-nix-env-set-flag"><title>Operation <option>--set-flag</option></title>
@ -632,7 +632,7 @@ $ nix-env -e '*' <lineannotation>(remove everything)</lineannotation></screen>
</refsection>
<refsection><title>Description</title>
<para>The <option>--set-flag</option> operation allows meta attributes
of installed packages to be modified. There are several attributes
that can be usefully modified, because they affect the behaviour of
@ -670,7 +670,7 @@ script:
</para>
</refsection>
<refsection><title>Examples</title>
<para>To prevent the currently installed Firefox from being upgraded:
@ -716,13 +716,13 @@ $ nix-env --set-flag priority 10 gcc</screen>
</para>
</refsection>
</refsection>
<!--######################################################################-->
<refsection><title>Operation <option>--query</option></title>
<refsection><title>Synopsis</title>
@ -738,9 +738,9 @@ $ nix-env --set-flag priority 10 gcc</screen>
<arg choice='plain'><option>--available</option></arg>
<arg choice='plain'><option>-a</option></arg>
</group>
<sbr />
<arg>
<group choice='req'>
<arg choice='plain'><option>--status</option></arg>
@ -785,7 +785,7 @@ $ nix-env --set-flag priority 10 gcc</screen>
</arg>
<sbr />
<arg choice='plain' rep='repeat'><replaceable>names</replaceable></arg>
</cmdsynopsis>
@ -793,7 +793,7 @@ $ nix-env --set-flag priority 10 gcc</screen>
<refsection><title>Description</title>
<para>The query operation displays information about either the store
paths that are installed in the current generation of the active
profile (<option>--installed</option>), or the derivations that are
@ -817,23 +817,23 @@ operates.</para>
<variablelist>
<varlistentry><term><option>--installed</option></term>
<listitem><para>The query operates on the store paths that are
installed in the current generation of the active profile. This
is the default.</para></listitem>
</varlistentry>
<varlistentry><term><option>--available</option></term>
<term><option>-a</option></term>
<listitem><para>The query operates on the derivations that are
available in the active Nix expression.</para></listitem>
</varlistentry>
</variablelist>
</refsection>
@ -874,7 +874,7 @@ user environment elements, etc. -->
<varlistentry><term><option>--status</option></term>
<term><option>-s</option></term>
<listitem><para>Print the <emphasis>status</emphasis> of the
derivation. The status consists of three characters. The first
is <literal>I</literal> or <literal>-</literal>, indicating
@ -888,7 +888,7 @@ user environment elements, etc. -->
third is <literal>S</literal> or <literal>-</literal>, indicating
whether a substitute is available for the
derivation.</para></listitem>
</varlistentry>
<varlistentry><term><option>--attr-path</option></term>
@ -901,17 +901,17 @@ user environment elements, etc. -->
<literal>nix-env --install</literal>.</para></listitem>
</varlistentry>
<varlistentry><term><option>--no-name</option></term>
<listitem><para>Suppress printing of the <literal>name</literal>
attribute of each derivation.</para></listitem>
</varlistentry>
<varlistentry><term><option>--compare-versions</option> /
<option>-c</option></term>
<listitem><para>Compare installed versions to available versions,
or vice versa (if <option>--available</option> is given). This is
useful for quickly seeing whether upgrades for installed
@ -926,21 +926,21 @@ user environment elements, etc. -->
or installed.</para></listitem>
</varlistentry>
<varlistentry><term><literal>=</literal> <replaceable>version</replaceable></term>
<listitem><para>At most the same version of the package is
available or installed.</para></listitem>
</varlistentry>
<varlistentry><term><literal>></literal> <replaceable>version</replaceable></term>
<listitem><para>Only older versions of the package are
available or installed.</para></listitem>
</varlistentry>
<varlistentry><term><literal>- ?</literal></term>
<listitem><para>No version of the package is available or
@ -951,45 +951,45 @@ user environment elements, etc. -->
</variablelist>
</para></listitem>
</varlistentry>
<varlistentry><term><option>--system</option></term>
<listitem><para>Print the <literal>system</literal> attribute of
the derivation.</para></listitem>
</varlistentry>
<varlistentry><term><option>--drv-path</option></term>
<listitem><para>Print the path of the store
derivation.</para></listitem>
</varlistentry>
<varlistentry><term><option>--out-path</option></term>
<listitem><para>Print the output path of the
derivation.</para></listitem>
</varlistentry>
<varlistentry><term><option>--description</option></term>
<listitem><para>Print a short (one-line) description of the
derivation, if available. The description is taken from the
<literal>meta.description</literal> attribute of the
derivation.</para></listitem>
</varlistentry>
<varlistentry><term><option>--meta</option></term>
<listitem><para>Print all of the meta-attributes of the
derivation. This option is only available with
<option>--xml</option>.</para></listitem>
</varlistentry>
</variablelist>
@ -1023,7 +1023,7 @@ IP- ORBit2-2.8.3 <lineannotation>(installed and by definition present)</linea
...
<lineannotation>(show available derivations in the Nix expression <!-- !!! <filename>-->foo.nix<!-- </filename> -->)</lineannotation>
$ nix-env -f ./foo.nix -qa '*'
$ nix-env -f ./foo.nix -qa '*'
foo-1.2.3
$ nix-env -qc '*' <lineannotation>(compare installed versions to what’s available)</lineannotation>
@ -1034,7 +1034,7 @@ firefox-1.0.4 &lt; 1.0.7 <lineannotation>(a more recent version is availab
<replaceable>...</replaceable>
<lineannotation>(show info about a specific package, in XML)</lineannotation>
$ nix-env -qa --xml --description firefox
$ nix-env -qa --xml --description firefox
<![CDATA[<?xml version='1.0' encoding='utf-8'?>
<items>
<item attrPath="0.0.firefoxWrapper"
@ -1045,8 +1045,8 @@ $ nix-env -qa --xml --description firefox
</refsection>
</refsection>
<!--######################################################################-->
@ -1067,25 +1067,25 @@ $ nix-env -qa --xml --description firefox
<refsection><title>Description</title>
<para>This operation makes <replaceable>path</replaceable> the current
profile for the user. That is, the symlink
<filename>~/.nix-profile</filename> is made to point to
<replaceable>path</replaceable>.</para>
</refsection>
<refsection><title>Examples</title>
<screen>
$ nix-env -S ~/my-profile</screen>
</refsection>
</refsection>
<!--######################################################################-->
<refsection><title>Operation <option>--list-generations</option></title>
@ -1101,7 +1101,7 @@ $ nix-env -S ~/my-profile</screen>
<refsection><title>Description</title>
<para>This operation print a list of all the currently existing
generations for the active profile. These may be switched to using
the <option>--switch-generation</option> operation. It also prints
@ -1121,11 +1121,11 @@ $ nix-env --list-generations
98 2004-02-06 16:24:33 (current)</screen>
</refsection>
</refsection>
<!--######################################################################-->
<refsection><title>Operation <option>--delete-generations</option></title>
@ -1142,7 +1142,7 @@ $ nix-env --list-generations
<refsection><title>Description</title>
<para>This operation deletes the specified generations of the current
profile. The generations can be a list of generation numbers, or the
special value <literal>old</literal> to delete all non-current
@ -1150,7 +1150,7 @@ generations. Periodically deleting old generations is important to
make garbage collection effective.</para>
</refsection>
<refsection><title>Examples</title>
<screen>
@ -1159,11 +1159,11 @@ $ nix-env --delete-generations 3 4 8
$ nix-env -p other_profile --delete-generations old</screen>
</refsection>
</refsection>
<!--######################################################################-->
<refsection><title>Operation <option>--switch-generation</option></title>
@ -1183,7 +1183,7 @@ $ nix-env -p other_profile --delete-generations old</screen>
<refsection><title>Description</title>
<para>This operation makes generation number
<replaceable>generation</replaceable> the current generation of the
active profile. That is, if the
@ -1207,11 +1207,11 @@ $ nix-env -G 42
switching from generation 50 to 42</screen>
</refsection>
</refsection>
<!--######################################################################-->
<refsection><title>Operation <option>--rollback</option></title>
@ -1226,7 +1226,7 @@ switching from generation 50 to 42</screen>
</refsection>
<refsection><title>Description</title>
<para>This operation switches to the “previous” generation of the
active profile, that is, the highest numbered generation lower than
the current generation, if it exists. It is just a convenience
@ -1246,9 +1246,9 @@ $ nix-env --rolback
error: no generation older than the current (91) exists</screen>
</refsection>
</refsection>
</refentry>