* Manual updates.
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Eelco Dolstra
parent
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@ -3,10 +3,16 @@
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<glosslist>
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<glossentry><glossterm>derivation</glossterm>
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<glossentry id="gloss-derivation"><glossterm>derivation</glossterm>
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<glossdef><para>A description of a build action. The result of a
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derivation is a store object.</para></glossdef>
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derivation is a store object. Derivations are typically specified
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in Nix expressions using the <link
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linkend="ssec-derivation"><function>derivation</function>
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primitive</link>. These are translated into low-level
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<emphasis>store derivations</emphasis> (implicitly by
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<command>nix-env</command> and <command>nix-build</command>, or
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explicitly by <command>nix-instantiate</command>).</para></glossdef>
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</glossentry>
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@ -73,7 +79,22 @@
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</glossentry>
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<glossentry><glossterm>closure</glossterm>
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<glossdef><para>The closure of a store path is the set of store
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paths that are directly or indirectly “reachable” from that store
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path. For instance, if the store object at path
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<varname>P</varname> contains a reference to path
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<varname>Q</varname>, then <varname>Q</varname> is in the closure of
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<varname>P</varname>. For correct deployment it is necessary to
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deploy whole closures, since otherwise at runtime files could be
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missing. The command <command>nix-store -qR</command> prints out
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closures of store paths.</para></glossdef>
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</glossentry>
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</glosslist>
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</appendix>
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</appendix>
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@ -1,89 +1,97 @@
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<refentry>
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<refnamediv>
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<refname>nix-instantiate</refname>
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<refpurpose>instantiate store expressions from Nix expressions</refpurpose>
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</refnamediv>
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<refnamediv>
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<refname>nix-instantiate</refname>
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<refpurpose>instantiate store derivations from Nix expressions</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>nix-instantiate</command>
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<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="opt-common-syn.xml#xpointer(/nop/*)" />
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<group choice='opt'>
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<arg choice='plain'><option>--parse-only</option></arg>
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<arg choice='plain'><option>--eval-only</option></arg>
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</group>
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<arg choice='plain' rep='repeat'><replaceable>files</replaceable></arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsynopsisdiv>
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<cmdsynopsis>
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<command>nix-instantiate</command>
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<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="opt-common-syn.xml#xpointer(/nop/*)" />
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<arg><option>--add-root</option> <replaceable>path</replaceable></arg>
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<arg><option>--indirect</option></arg>
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<group choice='opt'>
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<arg choice='plain'><option>--parse-only</option></arg>
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<arg choice='plain'><option>--eval-only</option></arg>
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</group>
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<arg choice='plain' rep='repeat'><replaceable>files</replaceable></arg>
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</cmdsynopsis>
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</refsynopsisdiv>
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<refsection>
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<title>Description</title>
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<para>
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The command <command>nix-instantiate</command> generates
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(low-level) store expressions from (high-level) Nix expressions.
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It loads and evaluates the Nix expressions in each of
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<replaceable>files</replaceable>. Each top-level expression
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should evaluate to a derivation, a list of derivations, or a set
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of derivations. The paths of the resulting store expressions
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are printed on standard output.
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</para>
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<refsection><title>Description</title>
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<para>
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This command is generally used for testing Nix expression before
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they are used with <command>nix-env</command>. See also <xref
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linkend="sec-common-options" />.
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</para>
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<para>The command <command>nix-instantiate</command> generates <link
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linkend="gloss-derivation">store derivations</link> from (high-level)
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Nix expressions. It loads and evaluates the Nix expressions in each
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of <replaceable>files</replaceable>. Each top-level expression should
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evaluate to a derivation, a list of derivations, or a set of
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derivations. The paths of the resulting store derivations are printed
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on standard output.</para>
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</refsection>
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<para>Most users and developers don’t need to use this command
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(<command>nix-env</command> and <command>nix-build</command> perform
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store derivation instantiation from Nix expressions automatically).
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It is most commonly used for implementing new deployment
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policies.</para>
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<refsection>
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<title>Options</title>
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<para>See also <xref linkend="sec-common-options" /> for a list of
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common options.</para>
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<variablelist>
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</refsection>
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<varlistentry>
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<term><option>--parse-only</option></term>
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<listitem>
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<para>
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Just parse the input files, and print their abstract
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syntax trees on standard output in ATerm format.
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</para>
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</listitem>
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</varlistentry>
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<refsection><title>Options</title>
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<variablelist>
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<varlistentry>
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<term><option>--add-root</option> <replaceable>path</replaceable></term>
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<term><option>--indirect</option></term>
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<listitem><para>See the <link linkend="opt-add-root">corresponding
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options</link> in <command>nix-store</command>.</para></listitem>
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</varlistentry>
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<varlistentry><term><option>--parse-only</option></term>
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<listitem><para>Just parse the input files, and print their
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abstract syntax trees on standard output in ATerm
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format.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--eval-only</option></term>
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<listitem>
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<para>
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Just parse and evaluate the input files, and print the
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resulting values on standard output. No instantiation of
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store expressions takes place.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry><term><option>--eval-only</option></term>
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<listitem><para>Just parse and evaluate the input files, and print
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the resulting values on standard output. No instantiation of
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store derivations takes place.</para></listitem>
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</varlistentry>
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</variablelist>
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</variablelist>
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</refsection>
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</refsection>
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<refsection>
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<title>Examples</title>
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<screen>
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$ nix-instantiate gcc.nix <lineannotation>(instantiate)</lineannotation>
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/nix/store/468abdcb93aa22bb721142615b97698b-d-gcc-3.3.2.store
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<refsection><title>Examples</title>
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$ nix-store -r $(nix-instantiate gcc.nix) <lineannotation>(build)</lineannotation>
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<screen>
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$ nix-instantiate test.nix <lineannotation>(instantiate)</lineannotation>
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/nix/store/cigxbmvy6dzix98dxxh9b6shg7ar5bvs-perl-BerkeleyDB-0.26.drv
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$ nix-store -r $(nix-instantiate gcc.nix) <lineannotation>(print output path)</lineannotation>
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/nix/store/9afa718cddfdfe94b5b9303d0430ceb1-gcc-3.3.2
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$ nix-store -r $(nix-instantiate test.nix) <lineannotation>(build)</lineannotation>
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<replaceable>...</replaceable>
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/nix/store/qhqk4n8ci095g3sdp93x7rgwyh9rdvgk-perl-BerkeleyDB-0.26 <lineannotation>(output path)</lineannotation>
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$ ls -l /nix/store/9afa718cddfdfe94b5b9303d0430ceb1-gcc-3.3.2
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dr-xr-xr-x 2 eelco users 360 2003-12-01 16:12 bin
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dr-xr-xr-x 3 eelco users 72 2003-12-01 16:12 include
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$ ls -l /nix/store/qhqk4n8ci095g3sdp93x7rgwyh9rdvgk-perl-BerkeleyDB-0.26
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dr-xr-xr-x 2 eelco users 4096 1970-01-01 01:00 lib
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...</screen>
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</refsection>
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</refsection>
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</refentry>
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@ -39,11 +39,11 @@ be performed. These are documented below.</para>
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<para>This section lists the options that are common to all
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operations. These options are allowed for every subcommand, though
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they may not always have an effect. See also <xref
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linkend="sec-common-options" />.</para>
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linkend="sec-common-options" /> for a list of common options.</para>
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<variablelist>
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<varlistentry><term><option>--add-root</option> <replaceable>path</replaceable></term>
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<varlistentry id="opt-add-root"><term><option>--add-root</option> <replaceable>path</replaceable></term>
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<listitem><para>Causes the result of a build action
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(<option>--realise</option> and <option>--force-realise</option>)
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@ -1,8 +1,31 @@
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<appendix>
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<title>Troubleshooting</title>
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<para>
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(Nothing.)
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<para>This section provides solutions for some common problems.</para>
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<sect1><title>Berkeley DB: <quote>Cannot allocate memory</quote></title>
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<para>Symptom: Nix operations (in particular the
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<command>nix-store</command> operations <option>--gc</option>,
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<option>--verify</option>, and <option>--clear-substitutes</option>
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— the latter being called by <command>nix-channel
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--update</command>) failing:
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<screen>
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$ nix-store --verify
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error: Db::del: Cannot allocate memory</screen>
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Possible solution: make sure that no Nix processes are running,
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then do:
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<screen>
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$ cd /nix/var/nix/db
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$ rm __db.00*</screen>
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</para>
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</sect1>
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</appendix>
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@ -1103,7 +1103,7 @@ weakest binding).</para>
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</simplesect>
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<simplesect><title>Derivations</title>
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<simplesect id="ssec-derivation"><title>Derivations</title>
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<para>The most important built-in function is
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<function>derivation</function>, which is used to describe a
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