mirror of
https://github.com/privatevoid-net/nix-super.git
synced 2024-11-27 00:06:16 +02:00
444 lines
12 KiB
XML
444 lines
12 KiB
XML
<refentry>
|
|
<refnamediv>
|
|
<refname>nix</refname>
|
|
<refpurpose>manipulate or query the Nix store</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<cmdsynopsis>
|
|
<command>nix</command>
|
|
<group choice='opt'>
|
|
<arg><option>--path</option></arg>
|
|
<arg><option>-p</option></arg>
|
|
</group>
|
|
<group choice='opt' rep='repeat'>
|
|
<arg><option>--verbose</option></arg>
|
|
<arg><option>-v</option></arg>
|
|
</group>
|
|
<group choice='opt' rep='repeat'>
|
|
<arg><option>--keep-failed</option></arg>
|
|
<arg><option>-K</option></arg>
|
|
</group>
|
|
<arg choice='plain'><replaceable>operation</replaceable></arg>
|
|
<arg rep='repeat'><replaceable>options</replaceable></arg>
|
|
<arg rep='repeat'><replaceable>arguments</replaceable></arg>
|
|
</cmdsynopsis>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para>
|
|
The command <command>nix</command> provides access to the Nix store. This
|
|
is the (set of) path(s) where Nix expressions and the file system objects
|
|
built by them are stored.
|
|
</para>
|
|
|
|
<para>
|
|
<command>nix</command> has many subcommands called
|
|
<emphasis>operations</emphasis>. These are individually documented
|
|
below. Exactly one operation must always be provided.
|
|
</para>
|
|
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Common Options</title>
|
|
|
|
<para>
|
|
In this section the options that are common to all Nix operations are
|
|
listed. These options are allowed for every subcommand (although they
|
|
may not always have an effect).
|
|
</para>
|
|
|
|
<variablelist>
|
|
|
|
<varlistentry>
|
|
<term><option>--path</option></term>
|
|
<listitem>
|
|
<para>
|
|
Indicates that any identifier arguments to the operation are paths
|
|
in the store rather than identifiers.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--verbose</option></term>
|
|
<listitem>
|
|
<para>
|
|
Increases the level of verbosity of diagnostic messages printed on
|
|
standard error. For each Nix operation, the information printed on
|
|
standard output is well-defined and specified below in the
|
|
respective sections. Any diagnostic information is printed on
|
|
standard error, never on standard output.
|
|
</para>
|
|
|
|
<para>
|
|
This option may be specified repeatedly. Currently, the following
|
|
verbosity levels exist:
|
|
</para>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term>0</term>
|
|
<listitem>
|
|
<para>
|
|
Print error messages only.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>1</term>
|
|
<listitem>
|
|
<para>
|
|
Print informational messages.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>2</term>
|
|
<listitem>
|
|
<para>
|
|
Print even more informational messages.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>3</term>
|
|
<listitem>
|
|
<para>
|
|
Print messages that should only be useful for debugging.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term>4</term>
|
|
<listitem>
|
|
<para>
|
|
<quote>Vomit mode</quote>: print vast amounts of debug
|
|
information.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--keep-failed</option></term>
|
|
<listitem>
|
|
<para>
|
|
Specifies that in case of a build failure, the temporary directory
|
|
(usually in <filename>/tmp</filename>) in which the build takes
|
|
place should not be deleted. The path of the build directory is
|
|
printed as an informational message.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
</variablelist>
|
|
|
|
</refsect1>
|
|
|
|
|
|
<!--######################################################################-->
|
|
|
|
<refsect1>
|
|
<title>Operation <option>--install</option></title>
|
|
|
|
<refsect2>
|
|
<title>Synopsis</title>
|
|
<cmdsynopsis>
|
|
<command>nix</command>
|
|
<group>
|
|
<arg><option>--install</option></arg>
|
|
<arg><option>-i</option></arg>
|
|
</group>
|
|
<arg choice='plain' rep='repeat'><replaceable>ids</replaceable></arg>
|
|
</cmdsynopsis>
|
|
</refsect2>
|
|
|
|
<refsect2>
|
|
<title>Description</title>
|
|
|
|
<para>
|
|
The operation <option>--install</option> realises the Nix expressions
|
|
identified by <replaceable>ids</replaceable> in the file system. If
|
|
these expressions are derivation expressions, they are first
|
|
normalised. That is, their target paths are are built, unless a normal
|
|
form is already known.
|
|
</para>
|
|
|
|
<para>
|
|
The identifiers of the normal forms of the given Nix expressions are
|
|
printed on standard output.
|
|
</para>
|
|
|
|
</refsect2>
|
|
|
|
</refsect1>
|
|
|
|
|
|
<!--######################################################################-->
|
|
|
|
<refsect1>
|
|
<title>Operation <option>--delete</option></title>
|
|
|
|
<refsect2>
|
|
<title>Synopsis</title>
|
|
<cmdsynopsis>
|
|
<command>nix</command>
|
|
<group>
|
|
<arg><option>--delete</option></arg>
|
|
<arg><option>-d</option></arg>
|
|
</group>
|
|
<arg choice='plain' rep='repeat'><replaceable>paths</replaceable></arg>
|
|
</cmdsynopsis>
|
|
</refsect2>
|
|
|
|
<refsect2>
|
|
<title>Description</title>
|
|
|
|
<para>
|
|
The operation <option>--delete</option> unconditionally deletes the
|
|
paths <replaceable>paths</replaceable> from the Nix store. It is an
|
|
error to attempt to delete paths outside of the store.
|
|
</para>
|
|
|
|
<warning>
|
|
<para>
|
|
This operation should almost never be called directly, since no
|
|
attempt is made to verify that no references exist to the paths to
|
|
be deleted. Therefore, careless deletion can result in an
|
|
inconsistent system. Deletion of paths in the store is done by the
|
|
garbage collector (which uses <option>--delete</option> to delete
|
|
unreferenced paths).
|
|
|
|
</para>
|
|
</warning>
|
|
|
|
</refsect2>
|
|
|
|
</refsect1>
|
|
|
|
|
|
<!--######################################################################-->
|
|
|
|
<refsect1>
|
|
<title>Operation <option>--query</option></title>
|
|
|
|
<refsect2>
|
|
<title>Synopsis</title>
|
|
<cmdsynopsis>
|
|
<command>nix</command>
|
|
<group>
|
|
<arg><option>--query</option></arg>
|
|
<arg><option>-q</option></arg>
|
|
</group>
|
|
<group>
|
|
<group>
|
|
<arg><option>--list</option></arg>
|
|
<arg><option>-l</option></arg>
|
|
</group>
|
|
<group>
|
|
<arg><option>--requisites</option></arg>
|
|
<arg><option>-r</option></arg>
|
|
</group>
|
|
<group>
|
|
<arg><option>--expansion</option></arg>
|
|
<arg><option>-e</option></arg>
|
|
</group>
|
|
<group>
|
|
<arg><option>--graph</option></arg>
|
|
<arg><option>-g</option></arg>
|
|
</group>
|
|
</group>
|
|
<arg choice='plain' rep='repeat'><replaceable>args</replaceable></arg>
|
|
</cmdsynopsis>
|
|
</refsect2>
|
|
|
|
<refsect2>
|
|
<title>Description</title>
|
|
|
|
<para>
|
|
The operation <option>--query</option> displays various bits of
|
|
information about Nix expressions or paths in the store. The queries
|
|
are described in <xref linkend='nixref-queries' />. At most one query
|
|
can be specified; the default query is <option>--list</option>.
|
|
</para>
|
|
|
|
</refsect2>
|
|
|
|
<refsect2 id='nixref-queries'>
|
|
<title>Queries</title>
|
|
|
|
<variablelist>
|
|
|
|
<varlistentry>
|
|
<term><option>--list</option></term>
|
|
<listitem>
|
|
<para>
|
|
Prints out the target paths of the Nix expressions indicated by
|
|
the identifiers <replaceable>args</replaceable>. In the case of
|
|
a derivation expression, these are the paths that will be
|
|
produced by the builder of the expression. In the case of a
|
|
slice expression, these are the root paths (which are generally
|
|
the paths that were produced by the builder of the derivation
|
|
expression of which the slice is a normal form).
|
|
</para>
|
|
|
|
<para>
|
|
This query has one option:
|
|
</para>
|
|
|
|
<variablelist>
|
|
|
|
<varlistentry>
|
|
<term><option>--normalise</option></term>
|
|
<listitem>
|
|
<para>
|
|
Causes the target paths of the <emphasis>normal
|
|
forms</emphasis> of the expressions to be printed, rather
|
|
than the target paths of the expressions themselves.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
</variablelist>
|
|
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--requisites</option></term>
|
|
<listitem>
|
|
<para>
|
|
Prints out the requisite paths of the Nix expressions indicated
|
|
by the identifiers <replaceable>args</replaceable>. The
|
|
requisite paths of a Nix expression are the paths that need to be
|
|
present in the system to be able to realise the expression. That
|
|
is, they form the <emphasis>closure</emphasis> of the expression
|
|
in the file system (i.e., no path in the set of requisite paths
|
|
points to anything outside the set of requisite paths).
|
|
</para>
|
|
|
|
<para>
|
|
The notion of requisite paths is very useful when one wants to
|
|
distribute Nix expressions. Since they form a closure, they are
|
|
the only paths one needs to distribute to another system to be
|
|
able to realise the expression on the other system.
|
|
</para>
|
|
|
|
<para>
|
|
This query is generally used to implement various kinds of
|
|
distribution. A <emphasis>source distribution</emphasis> is
|
|
obtained by distributing the requisite paths of a derivation
|
|
expression. A <emphasis>binary distribution</emphasis> is
|
|
obtained by distributing the requisite paths of a slice
|
|
expression (i.e., the normal form of a derivation expression; you
|
|
can directly specify the identifier of the slice expression, or
|
|
use <option>--normalise</option> and specify the identifier of a
|
|
derivation expression). A <emphasis>cache
|
|
distribution</emphasis> is obtained by distributing the
|
|
requisite paths of a derivation expression and specifying the
|
|
option <option>--include-successors</option>. This will include
|
|
not just the paths of a source and binary distribution, but also
|
|
all expressions and paths of subterms of the source. This is
|
|
useful if one wants to realise on the target system a Nix
|
|
expression that is similar but not quite the same as the one
|
|
being distributed, since any common subterms will be reused.
|
|
</para>
|
|
|
|
<para>
|
|
This query has a number of options:
|
|
</para>
|
|
|
|
<variablelist>
|
|
|
|
<varlistentry>
|
|
<term><option>--normalise</option></term>
|
|
<listitem>
|
|
<para>
|
|
Causes the requisite paths of the <emphasis>normal
|
|
forms</emphasis> of the expressions to be printed, rather
|
|
than the requisite paths of the expressions themselves.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--exclude-exprs</option></term>
|
|
<listitem>
|
|
<para>
|
|
Excludes the paths of Nix expressions. This causes the
|
|
closure property to be lost, that is, the resulting set of
|
|
paths is not enough to ensure realisibility.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--include-successors</option></term>
|
|
<listitem>
|
|
<para>
|
|
Also include the requisites of successors (normal forms).
|
|
Only the requisites of <emphasis>known</emphasis>
|
|
successors are included, i.e., the normal forms of
|
|
derivation expressions that have never been normalised will
|
|
not be included.
|
|
</para>
|
|
|
|
<para>
|
|
Note that not just the successor of a derivation expression
|
|
will be included, but also the successors of all input
|
|
expressions of that derivation expression. I.e., all
|
|
normal forms of subterms involved in the normalisation of
|
|
the top-level term are included.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
</variablelist>
|
|
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--expansion</option></term>
|
|
<listitem>
|
|
<para>
|
|
For each identifier in <replaceable>args</replaceable>, prints
|
|
all expansions of that identifier, that is, all paths whose
|
|
current content matches the identifier.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><option>--graph</option></term>
|
|
<listitem>
|
|
<para>
|
|
Prints a graph of the closure of the expressions identified by
|
|
<replaceable>args</replaceable> in the format of the
|
|
<command>dot</command> tool of AT&T's GraphViz package.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
</variablelist>
|
|
|
|
</refsect2>
|
|
|
|
</refsect1>
|
|
|
|
|
|
</refentry>
|
|
|
|
|
|
<!--
|
|
local variables:
|
|
sgml-parent-document: ("book.xml" "refentry")
|
|
end:
|
|
-->
|