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Eelco Dolstra 2005-04-05 15:28:30 +00:00
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27
doc/manual/glossary.xml
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@ -3,10 +3,16 @@
<glosslist>
<glossentry><glossterm>derivation</glossterm>
<glossentry id="gloss-derivation"><glossterm>derivation</glossterm>
<glossdef><para>A description of a build action. The result of a
derivation is a store object.</para></glossdef>
derivation is a store object. Derivations are typically specified
in Nix expressions using the <link
linkend="ssec-derivation"><function>derivation</function>
primitive</link>. These are translated into low-level
<emphasis>store derivations</emphasis> (implicitly by
<command>nix-env</command> and <command>nix-build</command>, or
explicitly by <command>nix-instantiate</command>).</para></glossdef>
</glossentry>
@ -73,7 +79,22 @@
</glossentry>
<glossentry><glossterm>closure</glossterm>
<glossdef><para>The closure of a store path is the set of store
paths that are directly or indirectly “reachable” from that store
path. For instance, if the store object at path
<varname>P</varname> contains a reference to path
<varname>Q</varname>, then <varname>Q</varname> is in the closure of
<varname>P</varname>. For correct deployment it is necessary to
deploy whole closures, since otherwise at runtime files could be
missing. The command <command>nix-store -qR</command> prints out
closures of store paths.</para></glossdef>
</glossentry>
</glosslist>
</appendix>
</appendix>

146
doc/manual/nix-instantiate.xml
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@ -1,89 +1,97 @@
<refentry>
<refnamediv>
<refname>nix-instantiate</refname>
<refpurpose>instantiate store expressions from Nix expressions</refpurpose>
</refnamediv>
<refnamediv>
<refname>nix-instantiate</refname>
<refpurpose>instantiate store derivations from Nix expressions</refpurpose>
</refnamediv>
<refsynopsisdiv>
<cmdsynopsis>
<command>nix-instantiate</command>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="opt-common-syn.xml#xpointer(/nop/*)" />
<group choice='opt'>
<arg choice='plain'><option>--parse-only</option></arg>
<arg choice='plain'><option>--eval-only</option></arg>
</group>
<arg choice='plain' rep='repeat'><replaceable>files</replaceable></arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsynopsisdiv>
<cmdsynopsis>
<command>nix-instantiate</command>
<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="opt-common-syn.xml#xpointer(/nop/*)" />
<arg><option>--add-root</option> <replaceable>path</replaceable></arg>
<arg><option>--indirect</option></arg>
<group choice='opt'>
<arg choice='plain'><option>--parse-only</option></arg>
<arg choice='plain'><option>--eval-only</option></arg>
</group>
<arg choice='plain' rep='repeat'><replaceable>files</replaceable></arg>
</cmdsynopsis>
</refsynopsisdiv>
<refsection>
<title>Description</title>
<para>
The command <command>nix-instantiate</command> generates
(low-level) store expressions from (high-level) Nix expressions.
It loads and evaluates the Nix expressions in each of
<replaceable>files</replaceable>. Each top-level expression
should evaluate to a derivation, a list of derivations, or a set
of derivations. The paths of the resulting store expressions
are printed on standard output.
</para>
<refsection><title>Description</title>
<para>
This command is generally used for testing Nix expression before
they are used with <command>nix-env</command>. See also <xref
linkend="sec-common-options" />.
</para>
<para>The command <command>nix-instantiate</command> generates <link
linkend="gloss-derivation">store derivations</link> from (high-level)
Nix expressions. It loads and evaluates the Nix expressions in each
of <replaceable>files</replaceable>. Each top-level expression should
evaluate to a derivation, a list of derivations, or a set of
derivations. The paths of the resulting store derivations are printed
on standard output.</para>
</refsection>
<para>Most users and developers don’t need to use this command
(<command>nix-env</command> and <command>nix-build</command> perform
store derivation instantiation from Nix expressions automatically).
It is most commonly used for implementing new deployment
policies.</para>
<refsection>
<title>Options</title>
<para>See also <xref linkend="sec-common-options" /> for a list of
common options.</para>
<variablelist>
</refsection>
<varlistentry>
<term><option>--parse-only</option></term>
<listitem>
<para>
Just parse the input files, and print their abstract
syntax trees on standard output in ATerm format.
</para>
</listitem>
</varlistentry>
<refsection><title>Options</title>
<variablelist>
<varlistentry>
<term><option>--add-root</option> <replaceable>path</replaceable></term>
<term><option>--indirect</option></term>
<listitem><para>See the <link linkend="opt-add-root">corresponding
options</link> in <command>nix-store</command>.</para></listitem>
</varlistentry>
<varlistentry><term><option>--parse-only</option></term>
<listitem><para>Just parse the input files, and print their
abstract syntax trees on standard output in ATerm
format.</para></listitem>
</varlistentry>
<varlistentry>
<term><option>--eval-only</option></term>
<listitem>
<para>
Just parse and evaluate the input files, and print the
resulting values on standard output. No instantiation of
store expressions takes place.
</para>
</listitem>
</varlistentry>
<varlistentry><term><option>--eval-only</option></term>
<listitem><para>Just parse and evaluate the input files, and print
the resulting values on standard output. No instantiation of
store derivations takes place.</para></listitem>
</varlistentry>
</variablelist>
</variablelist>
</refsection>
</refsection>
<refsection>
<title>Examples</title>
<screen>
$ nix-instantiate gcc.nix <lineannotation>(instantiate)</lineannotation>
/nix/store/468abdcb93aa22bb721142615b97698b-d-gcc-3.3.2.store
<refsection><title>Examples</title>
$ nix-store -r $(nix-instantiate gcc.nix) <lineannotation>(build)</lineannotation>
<screen>
$ nix-instantiate test.nix <lineannotation>(instantiate)</lineannotation>
/nix/store/cigxbmvy6dzix98dxxh9b6shg7ar5bvs-perl-BerkeleyDB-0.26.drv
$ nix-store -r $(nix-instantiate gcc.nix) <lineannotation>(print output path)</lineannotation>
/nix/store/9afa718cddfdfe94b5b9303d0430ceb1-gcc-3.3.2
$ nix-store -r $(nix-instantiate test.nix) <lineannotation>(build)</lineannotation>
<replaceable>...</replaceable>
/nix/store/qhqk4n8ci095g3sdp93x7rgwyh9rdvgk-perl-BerkeleyDB-0.26 <lineannotation>(output path)</lineannotation>
$ ls -l /nix/store/9afa718cddfdfe94b5b9303d0430ceb1-gcc-3.3.2
dr-xr-xr-x 2 eelco users 360 2003-12-01 16:12 bin
dr-xr-xr-x 3 eelco users 72 2003-12-01 16:12 include
$ ls -l /nix/store/qhqk4n8ci095g3sdp93x7rgwyh9rdvgk-perl-BerkeleyDB-0.26
dr-xr-xr-x 2 eelco users 4096 1970-01-01 01:00 lib
...</screen>
</refsection>
</refsection>
</refentry>

4
doc/manual/nix-store.xml
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@ -39,11 +39,11 @@ be performed. These are documented below.</para>
<para>This section lists the options that are common to all
operations. These options are allowed for every subcommand, though
they may not always have an effect. See also <xref
linkend="sec-common-options" />.</para>
linkend="sec-common-options" /> for a list of common options.</para>
<variablelist>
<varlistentry><term><option>--add-root</option> <replaceable>path</replaceable></term>
<varlistentry id="opt-add-root"><term><option>--add-root</option> <replaceable>path</replaceable></term>
<listitem><para>Causes the result of a build action
(<option>--realise</option> and <option>--force-realise</option>)

27
doc/manual/troubleshooting.xml
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@ -1,8 +1,31 @@
<appendix>
<title>Troubleshooting</title>
<para>
(Nothing.)
<para>This section provides solutions for some common problems.</para>
<sect1><title>Berkeley DB: <quote>Cannot allocate memory</quote></title>
<para>Symptom: Nix operations (in particular the
<command>nix-store</command> operations <option>--gc</option>,
<option>--verify</option>, and <option>--clear-substitutes</option>
— the latter being called by <command>nix-channel
--update</command>) failing:
<screen>
$ nix-store --verify
error: Db::del: Cannot allocate memory</screen>
Possible solution: make sure that no Nix processes are running,
then do:
<screen>
$ cd /nix/var/nix/db
$ rm __db.00*</screen>
</para>
</sect1>
</appendix>

2
doc/manual/writing-nix-expressions.xml
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@ -1103,7 +1103,7 @@ weakest binding).</para>
</simplesect>
<simplesect><title>Derivations</title>
<simplesect id="ssec-derivation"><title>Derivations</title>
<para>The most important built-in function is
<function>derivation</function>, which is used to describe a