diff options
Diffstat (limited to 'doc/manual/nix-env.xml')
| -rw-r--r-- | doc/manual/nix-env.xml | 447 |
1 files changed, 442 insertions, 5 deletions
diff --git a/doc/manual/nix-env.xml b/doc/manual/nix-env.xml index bdf35bd32a..874f270816 100644 --- a/doc/manual/nix-env.xml +++ b/doc/manual/nix-env.xml @@ -15,6 +15,14 @@ </group> <replaceable>path</replaceable> </arg> + <arg> + <group choice='req'> + <arg choice='plain'><option>--profile</option></arg> + <arg choice='plain'><option>-p</option></arg> + </group> + <replaceable>path</replaceable> + </arg> + <arg><option>--dry-run</option></arg> <arg choice='plain'><replaceable>operation</replaceable></arg> <arg rep='repeat'><replaceable>options</replaceable></arg> <arg rep='repeat'><replaceable>arguments</replaceable></arg> @@ -72,7 +80,8 @@ <term><option>--file</option> / <option>-f</option></term> <listitem> <para> - Specifies the Nix expression used by the + 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 @@ -81,6 +90,36 @@ </listitem> </varlistentry> + <varlistentry> + <term><option>--profile</option> / <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 user environments called + <emphasis>generations</emphasis>, one of 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> and + <option>--uninstall</option> operations, this flag will + cause <command>nix-env</command> to print what + <emphasis>would</emphasis> be done if this flag had not + been specified, without actually doing it. + </para> + </listitem> + </varlistentry> + </variablelist> </refsection> @@ -114,12 +153,12 @@ <term><filename>~/.nix-profile</filename></term> <listitem> <para> - A symbolic link to the user's current profile. The - default profile is + 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. + include <filename>~/.nix-profile/bin</filename> for the + user environment to be visible to the user. </para> </listitem> </varlistentry> @@ -143,6 +182,55 @@ <arg choice='plain'><option>--install</option></arg> <arg choice='plain'><option>-i</option></arg> </group> + <arg choice='plain' rep='repeat'><replaceable>drvnames</replaceable></arg> + </cmdsynopsis> + </refsection> + + <refsection> + <title>Description</title> + + <para> + The install operation creates a new user environment, based on + the current generation of the active profile, to which the + derivations designated by <replaceable>drvnames</replaceable> + in the active Nix expression are added. + </para> + + </refsection> + + <refsection> + <title>Examples</title> + + <screen> +$ nix-env --install gcc-3.3.2 <lineannotation>(install specific version)</lineannotation> +$ nix-env --install gcc <lineannotation>(just pick any version)</lineannotation> +$ nix-env -f ~/foo.nix -i '*' <lineannotation>(install everything in <filename>foo.nix</filename>)</lineannotation></screen> + + </refsection> + + </refsection> + + + + <!--######################################################################--> + + <refsection> + <title>Operation <option>--upgrade</option></title> + + <refsection> + <title>Synopsis</title> + <cmdsynopsis> + <command>nix-env</command> + <group choice='req'> + <arg choice='plain'><option>--upgrade</option></arg> + <arg choice='plain'><option>-u</option></arg> + </group> + <group choice='opt'> + <arg choice='plain'><option>--lt</option></arg> + <arg choice='plain'><option>--leq</option></arg> + <arg choice='plain'><option>--always</option></arg> + </group> + <arg choice='plain' rep='repeat'><replaceable>drvnames</replaceable></arg> </cmdsynopsis> </refsection> @@ -150,6 +238,141 @@ <title>Description</title> <para> + The upgrade operation creates a new user environment, based on + the current generation of the active profile, in which all + derivations designated by <replaceable>drvnames</replaceable> + for which there are newer versions in the active Nix + expression are replaced by those newer versions. Matching + derivations for which there are no newer versions are left + untouched; this is not an error. It is also not an error if + an element of <replaceable>drvnames</replaceable> matches no + installed derivations. + </para> + + <para> + If multiple derivations in the active Nix expression match an + installed derivation, the one with the highest version is + selected. + </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 + <quote>upgrade</quote> 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 + <quote>synchronisation</quote> between the installed and + available derivations. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>--always</option></term> + <listitem> + <para> + In addition to upgrading to newer versions, also + <quote>upgrade</quote> 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> + + </refsection> + + <refsection> + <title>Examples</title> + + <screen> +$ nix-env --upgrade gcc +upgrading `gcc-3.3.1' to `gcc-3.4' + +$ nix-env --upgrade pan +<lineannotation>(no upgrades available, so nothing happens)</lineannotation> + +$ 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> + + </refsection> + + <refsection> + <title>Versions</title> + + <para> + The upgrade operation determines whether a derivation + <varname>y</varname> is an upgrade of a derivation + <varname>x</varname> by looking at their respective + <literal>name</literal> attributes. The names (e.g., + <literal>gcc-3.3.1</literal> are split into two parts: the + package name (<literal>gcc</literal>), and the version + (<literal>3.3.1</literal>). The version part starts after the + first dash not following by a letter. <varname>x</varname> is + considered an upgrade of <varname>y</varname> if their package + names match, and the version of <varname>y</varname> is higher + that that of <varname>x</varname>. + </para> + + <para> + The versions are compared by splitting them into contiguous + components of numbers and letters. E.g., + <literal>3.3.1pre5</literal> is split into <literal>[3, 3, 1, + "pre", 5]</literal>. These lists are then compared + lexicographically (from left to right). Corresponding + components <varname>a</varname> and <varname>b</varname> are + compared as follows. If they are both numbers, integer + comparison is used. If <varname>a</varname> is an empty + string and <varname>b</varname> is a number, + <varname>a</varname> is considered less than + <varname>b</varname>. The special string component + <literal>pre</literal> (for <emphasis>pre-release</emphasis>) + is considered to be less than other components. String + components are considered less than number components. + Otherwise, they are compared lexicographically (i.e., using + case-sensitive string comparison). + </para> + + <para> + This is illustrated by the following examples: + + <screen> +1.0 < 2.3 +2.1 < 2.3 +2.3 = 2.3 +2.5 > 2.3 +3.1 > 2.3 +2.3.1 > 2.3 +2.3.1 > 2.3a +2.3pre1 < 2.3 +2.3pre3 < 2.3pre12 +2.3a < 2.3c +2.3pre1 < 2.3c +2.3pre1 < 2.3q</screen> + </para> </refsection> @@ -157,4 +380,218 @@ </refsection> + + <!--######################################################################--> + + <refsection> + <title>Operation <option>--uninstall</option></title> + + <refsection> + <title>Synopsis</title> + <cmdsynopsis> + <command>nix-env</command> + <group choice='req'> + <arg choice='plain'><option>--uninstall</option></arg> + <arg choice='plain'><option>-e</option></arg> + </group> + <arg choice='plain' rep='repeat'><replaceable>drvnames</replaceable></arg> + </cmdsynopsis> + </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 + derivations designated by <replaceable>drvnames</replaceable> + are removed. + </para> + + </refsection> + + <refsection> + <title>Examples</title> + + <screen> +$ nix-env --uninstall gcc +$ nix-env -e '*' <lineannotation>(remove everything)</lineannotation></screen> + + </refsection> + + </refsection> + + + + <!--######################################################################--> + + <refsection> + <title>Operation <option>--query</option></title> + + <refsection> + <title>Synopsis</title> + <cmdsynopsis> + <command>nix-env</command> + <group choice='req'> + <arg choice='plain'><option>--query</option></arg> + <arg choice='plain'><option>-q</option></arg> + </group> + <group choice='opt'> + <arg choice='plain'><option>--installed</option></arg> + <arg choice='plain'><option>--available</option></arg> + <arg choice='plain'><option>-a</option></arg> + </group> + <group choice='req'> + <arg choice='plain'><option>--name</option></arg> + <arg choice='plain'><option>--expr</option></arg> + <arg choice='plain'><option>--status</option></arg> + <arg choice='plain'><option>-s</option></arg> + </group> + </cmdsynopsis> + </refsection> + + <refsection> + <title>Description</title> + + <para> + The query operation displays information about either the + derivations that are installed in the current generation of + the active profile (<option>--installed</option>), or the + derivations that are available for installation in the active + Nix expression (<option>--available</option>). + </para> + + <para> + The derivations are sorted by their <literal>name</literal> + attributes. + </para> + + </refsection> + + <refsection> + <title>Source selection</title> + + <para> + The following flags specify the set of derivations on which + the query operates. + </para> + + <variablelist> + + <varlistentry> + <term><option>--installed</option></term> + <listitem> + <para> + The query operates on the derivations that are installed + in the current generation of the active profile. This + is the default + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>--available</option> / <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> + + <refsection> + <title>Queries</title> + + <para> + The following flags specify what information to display about + the selected derivations. Only one type of query may be + specified. + </para> + + <variablelist> + + <varlistentry> + <term><option>--name</option></term> + <listitem> + <para> + Prints the <literal>name</literal> attribute of each + derivation. This is the default. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>--expr</option></term> + <listitem> + <para> + Prints the store expression in the Nix store that + described the derivation. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><option>--status</option> / <option>-s</option></term> + <listitem> + <para> + Prints the <emphasis>status</emphasis> of each + derivation, followed by its <literal>name</literal> + attribute. The status consists of three characters. + The first is <literal>I</literal> or + <literal>-</literal>, indicating whether the derivation + is currently installed in the current generation of the + active profile. This is by definition the case for + <option>--installed</option>, but not for + <option>--available</option>. The second is + <literal>P</literal> or <literal>-</literal>, indicating + whether the derivation is present on the system. This + indicates whether installation of an available + derivation will require the derivation to be built. The + third is <literal>S</literal> or <literal>-</literal>, + indicating whether a substitute is available for the + derivation. + </para> + </listitem> + </varlistentry> + + </variablelist> + + </refsection> + + <refsection> + <title>Examples</title> + + <screen> +$ nix-env -q <lineannotation>(show installed derivations)</lineannotation> +MozillaFirebird-0.7 +bison-1.875c +docbook-xml-4.2 +... + +$ nix-env -qa <lineannotation>(show available derivations)</lineannotation> +GConf-2.4.0.1 +MPlayer-1.0pre3 +MozillaFirebird-0.7 +ORBit2-2.8.3 +... + +$ nix-env -qas <lineannotation>(show status of available derivations)</lineannotation> +-P- GConf-2.4.0.1 <lineannotation>(not installed but present)</lineannotation> +--S MPlayer-1.0pre3 <lineannotation>(not present, but there is a substitute for fast installation)</lineannotation> +--S MozillaFirebird-0.7 <lineannotation>(i.e., this is not the installed Firebird, even though the version is the same!)</lineannotation> +IP- bison-1.875c <lineannotation>(installed and by definition present)</lineannotation> +... + +$ nix-env -f ./foo.nix -qa <lineannotation>(show available derivations in the Nix expression <filename>foo.nix</filename>)</lineannotation> +foo-1.2.3</screen> + + </refsection> + + </refsection> + + </refentry> |