forked from lix-project/lix
* Build hook documentation.
* nix-store options.
This commit is contained in:
Eelco Dolstra
parent
806b91f104
commit
f1ae10b992
|
|
@ -65,7 +65,10 @@ will call whenever it wants to build a derivation. The build hook
|
|||
will perform it in the usual way if possible, or it can accept it, in
|
||||
which case it is responsible for somehow getting the inputs of the
|
||||
build to another machine, doing the build there, and getting the
|
||||
results back.</para>
|
||||
results back. The details of the build hook protocol are described in
|
||||
the documentation of the <link
|
||||
linkend="envar-build-hook"><envar>NIX_BUILD_HOOK</envar>
|
||||
variable</link>.</para>
|
||||
|
||||
<example id='ex-remote-systems'><title>Remote machine configuration:
|
||||
<filename>remote-systems.conf</filename></title>
|
||||
|
|
|
|||
|
|
@ -118,6 +118,158 @@ $ mount -o bind /mnt/otherdisk/nix /nix</screen>
|
|||
</varlistentry>
|
||||
|
||||
|
||||
<varlistentry id="envar-build-hook"><term><envar>NIX_BUILD_HOOK</envar></term>
|
||||
|
||||
<listitem>
|
||||
|
||||
<para>Specifies the location of the <emphasis>build hook</emphasis>,
|
||||
which is a program (typically some script) that Nix will call
|
||||
whenever it wants to build a derivation. This is used to implement
|
||||
distributed builds (see <xref linkend="sec-distributed-builds"
|
||||
/>). The protocol by which the calling Nix process and the build
|
||||
hook communicate is as follows.</para>
|
||||
|
||||
<para>The build hook is called with the following command-line
|
||||
arguments:
|
||||
|
||||
<orderedlist>
|
||||
|
||||
<listitem><para>A boolean value <literal>0</literal> or
|
||||
<literal>1</literal> specifying whether Nix can locally execute
|
||||
more builds, as per the <link
|
||||
linkend="opt-max-jobs"><option>--max-jobs</option> option</link>.
|
||||
The purpose of this argument is to allow the hook to not have to
|
||||
maintain bookkeeping for the local machine.</para></listitem>
|
||||
|
||||
<listitem><para>The Nix platform identifier for the local machine
|
||||
(e.g., <literal>i686-linux</literal>).</para></listitem>
|
||||
|
||||
<listitem><para>The Nix platform identifier for the derivation,
|
||||
i.e., its <link linkend="attr-system"><varname>system</varname>
|
||||
attribute</link>.</para></listitem>
|
||||
|
||||
<listitem><para>The store path of the derivation.</para></listitem>
|
||||
|
||||
</orderedlist>
|
||||
|
||||
</para>
|
||||
|
||||
<para>On the basis of this information, and whatever persistent
|
||||
state the build hook keeps about other machines and their current
|
||||
load, it has to decide what to do with the build. It should print
|
||||
out on file descriptor 3 one of the following responses (terminated
|
||||
by a newline, <literal>"\n"</literal>):
|
||||
|
||||
<variablelist>
|
||||
|
||||
<varlistentry><term><literal>decline</literal></term>
|
||||
|
||||
<listitem><para>The build hook is not willing or able to perform
|
||||
the build; the calling Nix process should do the build itself,
|
||||
if possible.</para></listitem>
|
||||
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry><term><literal>postpone</literal></term>
|
||||
|
||||
<listitem><para>The build hook cannot perform the build now, but
|
||||
can do so in the future (e.g., because all available build slots
|
||||
on remote machines are in use). The calling Nix process should
|
||||
postpone this build until at least one currently running build
|
||||
has terminated.</para></listitem>
|
||||
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry><term><literal>accept</literal></term>
|
||||
|
||||
<listitem><para>The build hook has accepted the
|
||||
build.</para></listitem>
|
||||
|
||||
</varlistentry>
|
||||
|
||||
</variablelist>
|
||||
|
||||
</para>
|
||||
|
||||
<para>If the build hook accepts the build, it is possible that it is
|
||||
no longer necessary to do the build because some other process has
|
||||
performed the build in the meantime. To prevent races, the hook
|
||||
must read from file descriptor 4 a single line that tells it whether
|
||||
to continue:
|
||||
|
||||
<variablelist>
|
||||
|
||||
<varlistentry><term><literal>cancel</literal></term>
|
||||
|
||||
<listitem><para>The build has already been done, so the hook
|
||||
should exit.</para></listitem>
|
||||
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry><term><literal>okay</literal></term>
|
||||
|
||||
<listitem><para>The hook should proceed with the build. At this
|
||||
point, the calling Nix process has acquired locks on the output
|
||||
path, so no other Nix process will perform the
|
||||
build.</para></listitem>
|
||||
|
||||
</varlistentry>
|
||||
|
||||
</variablelist>
|
||||
|
||||
</para>
|
||||
|
||||
<para>If the hook has been told to proceed, Nix will store in the
|
||||
hook’s current directory a number of text files that contain
|
||||
information about the derivation:
|
||||
|
||||
<variablelist>
|
||||
|
||||
<varlistentry><term><filename>inputs</filename></term>
|
||||
|
||||
<listitem><para>The set of store paths that are inputs to the
|
||||
build process (one per line). These have to be copied
|
||||
<emphasis>to</emphasis> the remote machine (in addition to the
|
||||
store derivation itself).</para></listitem>
|
||||
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry><term><filename>outputs</filename></term>
|
||||
|
||||
<listitem><para>The set of store paths that are outputs of the
|
||||
derivation (one per line). These have to be copied
|
||||
<emphasis>from</emphasis> the remote machine if the build
|
||||
succeeds.</para></listitem>
|
||||
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry><term><filename>references</filename></term>
|
||||
|
||||
<listitem><para>The reference graph of the inputs, in the format
|
||||
accepted by the command <link
|
||||
linkend="rsec-nix-store-reg-val"><command>nix-store
|
||||
--register-validity</command></link>. It is necessary to run
|
||||
this command on the remote machine after copying the inputs to
|
||||
inform Nix on the remote machine that the inputs are valid
|
||||
paths.</para></listitem>
|
||||
|
||||
</varlistentry>
|
||||
|
||||
</variablelist>
|
||||
|
||||
</para>
|
||||
|
||||
<para>The hook should copy the inputs to the remote machine,
|
||||
register the validity of the inputs, perform the remote build, and
|
||||
copy the outputs back to the local machine. An exit code other than
|
||||
<literal>0</literal> indicates that the hook has failed.</para>
|
||||
|
||||
</listitem>
|
||||
|
||||
|
||||
</varlistentry>
|
||||
|
||||
|
||||
</variablelist>
|
||||
|
||||
</sect1>
|
||||
|
|
|
|||
|
|
@ -262,321 +262,225 @@ $ nix-store --gc</screen>
|
|||
|
||||
<!--######################################################################-->
|
||||
|
||||
<refsection>
|
||||
<title>Operation <option>--query</option></title>
|
||||
<refsection><title>Operation <option>--query</option></title>
|
||||
|
||||
<refsection>
|
||||
<title>Synopsis</title>
|
||||
<cmdsynopsis>
|
||||
<command>nix-store</command>
|
||||
<group choice='req'>
|
||||
<arg choice='plain'><option>--query</option></arg>
|
||||
<arg choice='plain'><option>-q</option></arg>
|
||||
</group>
|
||||
<group choice='req'>
|
||||
<arg choice='plain'><option>--list</option></arg>
|
||||
<arg choice='plain'><option>-l</option></arg>
|
||||
<arg choice='plain'><option>--requisites</option></arg>
|
||||
<arg choice='plain'><option>-R</option></arg>
|
||||
<arg choice='plain'><option>--predecessors</option></arg>
|
||||
<arg choice='plain'><option>--graph</option></arg>
|
||||
</group>
|
||||
<arg><option>--normalise</option></arg>
|
||||
<arg><option>-n</option></arg>
|
||||
<arg><option>--force-realise</option></arg>
|
||||
<arg><option>-f</option></arg>
|
||||
<arg choice='plain' rep='repeat'><replaceable>args</replaceable></arg>
|
||||
</cmdsynopsis>
|
||||
</refsection>
|
||||
<refsection><title>Synopsis</title>
|
||||
|
||||
<refsection>
|
||||
<title>Description</title>
|
||||
<cmdsynopsis>
|
||||
<command>nix-store</command>
|
||||
<group choice='req'>
|
||||
<arg choice='plain'><option>--query</option></arg>
|
||||
<arg choice='plain'><option>-q</option></arg>
|
||||
</group>
|
||||
<group choice='req'>
|
||||
<arg choice='plain'><option>--list</option></arg>
|
||||
<arg choice='plain'><option>-l</option></arg>
|
||||
<arg choice='plain'><option>--requisites</option></arg>
|
||||
<arg choice='plain'><option>-R</option></arg>
|
||||
<arg choice='plain'><option>--predecessors</option></arg>
|
||||
<arg choice='plain'><option>--graph</option></arg>
|
||||
</group>
|
||||
<arg><option>--normalise</option></arg>
|
||||
<arg><option>-n</option></arg>
|
||||
<arg><option>--force-realise</option></arg>
|
||||
<arg><option>-f</option></arg>
|
||||
<arg choice='plain' rep='repeat'><replaceable>args</replaceable></arg>
|
||||
</cmdsynopsis>
|
||||
|
||||
</refsection>
|
||||
|
||||
|
||||
<refsection><title>Description</title>
|
||||
|
||||
<para>
|
||||
The operation <option>--query</option> displays various bits
|
||||
of information about store expressions or store paths. The
|
||||
queries are described below. At most one query can be
|
||||
specified. The default query is <option>--list</option>.
|
||||
</para>
|
||||
<para>The operation <option>--query</option> displays various bits of
|
||||
information about store paths. The queries are described below. At
|
||||
most one query can be specified. The default query is
|
||||
<option>--list</option>.</para>
|
||||
|
||||
</refsection>
|
||||
</refsection>
|
||||
|
||||
|
||||
<refsection>
|
||||
<title>Common query options</title>
|
||||
<refsection><title>Common query options</title>
|
||||
|
||||
<variablelist>
|
||||
<variablelist>
|
||||
|
||||
<varlistentry>
|
||||
<term><option>--normalise</option> / <option>-n</option></term>
|
||||
<listitem>
|
||||
<para>
|
||||
For those queries that take a Nix store expression, this
|
||||
option causes those expressions to be normalised first.
|
||||
</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
<varlistentry><term><option>--use-output</option> / <option>-u</option></term>
|
||||
|
||||
<listitem><para>For each argument to the query that is a store
|
||||
derivation, apply the query to the output path of the derivation
|
||||
instead.</para></listitem>
|
||||
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term><option>--force-realise</option> / <option>-f</option></term>
|
||||
<listitem>
|
||||
<para>
|
||||
For those queries that take a Nix store expression, this
|
||||
option causes those expressions to be realised first.
|
||||
This is just a short-cut for the common idiom
|
||||
</para>
|
||||
<screen>
|
||||
nix-store --realise /nix/store/bla.store
|
||||
x=`nix-store --query --normalise /nix/store/bla.store`
|
||||
<emphasis>(do something with the path $x</emphasis></screen>
|
||||
<para>
|
||||
which using this flag can be written as
|
||||
</para>
|
||||
<screen>
|
||||
x=`nix-store --query --normalise --force-realise /nix/store/bla.store`
|
||||
<emphasis>(do something with the path $x</emphasis></screen>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
<varlistentry><term><option>--force-realise</option> / <option>-f</option></term>
|
||||
|
||||
<listitem><para>Realise each argument to the query first (see
|
||||
<link linkend="rsec-nix-store-realise"><command>nix-store
|
||||
--realise</command></link>).</para></listitem>
|
||||
|
||||
</variablelist>
|
||||
</varlistentry>
|
||||
|
||||
</variablelist>
|
||||
|
||||
</refsection>
|
||||
</refsection>
|
||||
|
||||
|
||||
<refsection id='nixref-queries'>
|
||||
<title>Queries</title>
|
||||
<refsection id='nixref-queries'><title>Queries</title>
|
||||
|
||||
<variablelist>
|
||||
<variablelist>
|
||||
|
||||
<varlistentry>
|
||||
<term><option>--list</option> / <option>-l</option></term>
|
||||
<listitem>
|
||||
<para>
|
||||
Prints out the <emphasis>output paths</emphasis> of the
|
||||
store expressions indicated by the identifiers
|
||||
<replaceable>args</replaceable>. In the case of a
|
||||
derivation expression, these are the paths that will be
|
||||
produced when the derivation is realised. In the case
|
||||
of a closure expression, these are the paths that were
|
||||
produced the derivation expression of which the closure
|
||||
expression is a successor.
|
||||
</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
<varlistentry><term><option>--list</option> / <option>-l</option></term>
|
||||
|
||||
<varlistentry>
|
||||
<term><option>--requisites</option> / <option>-R</option></term>
|
||||
<listitem>
|
||||
<para>
|
||||
Prints out the requisite paths of the store 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>
|
||||
<listitem><para>Prints out the <emphasis>output paths</emphasis>
|
||||
of the store expressions indicated by the identifiers
|
||||
<replaceable>args</replaceable>. In the case of a derivation
|
||||
expression, these are the paths that will be produced when the
|
||||
derivation is realised. In the case of a closure expression,
|
||||
these are the paths that were produced the derivation expression
|
||||
of which the closure expression is a successor.</para></listitem>
|
||||
|
||||
</varlistentry>
|
||||
|
||||
<para>
|
||||
The notion of requisite paths is very useful when one
|
||||
wants to distribute store 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>
|
||||
<varlistentry><term><option>--requisites</option> / <option>-R</option></term>
|
||||
|
||||
<para>
|
||||
This query is generally used to implement various kinds
|
||||
of deployment. A <emphasis>source deployment</emphasis>
|
||||
is obtained by distributing the requisite paths of a
|
||||
derivation expression. A <emphasis>binary
|
||||
deployment</emphasis> is obtained by distributing the
|
||||
requisite paths of a closure expression. A
|
||||
<emphasis>cache deployment</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
|
||||
deployment, 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>
|
||||
<listitem><para>Prints out the requisite paths of the store
|
||||
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>
|
||||
This query has a number of options:
|
||||
</para>
|
||||
<para>The notion of requisite paths is very useful when one wants
|
||||
to distribute store 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>
|
||||
|
||||
<variablelist>
|
||||
<para>This query is generally used to implement various kinds of
|
||||
deployment. A <emphasis>source deployment</emphasis> is obtained
|
||||
by distributing the requisite paths of a derivation expression. A
|
||||
<emphasis>binary deployment</emphasis> is obtained by distributing
|
||||
the requisite paths of a closure expression. A <emphasis>cache
|
||||
deployment</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 deployment, 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>
|
||||
|
||||
<varlistentry>
|
||||
<term><option>--exclude-exprs</option></term>
|
||||
<listitem>
|
||||
<para>
|
||||
Excludes the paths of store 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>
|
||||
<para>This query has one option:</para>
|
||||
|
||||
<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>
|
||||
<variablelist>
|
||||
|
||||
<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>
|
||||
<varlistentry><term><option>--include-outputs</option></term>
|
||||
|
||||
<listitem><para>Also include the output path of store
|
||||
derivations, and their closures.</para></listitem>
|
||||
|
||||
</varlistentry>
|
||||
|
||||
</variablelist>
|
||||
</variablelist>
|
||||
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
</listitem>
|
||||
|
||||
<varlistentry>
|
||||
<term><option>--predecessors</option></term>
|
||||
<listitem>
|
||||
<para>
|
||||
For each store expression stored at paths
|
||||
<replaceable>args</replaceable>, prints its
|
||||
<emphasis>predecessors</emphasis>. A derivation
|
||||
expression <varname>p</varname> is a predecessor of a
|
||||
store expression <varname>q</varname> iff
|
||||
<varname>q</varname> is a successor of
|
||||
<varname>p</varname>.
|
||||
</para>
|
||||
</listitem>
|
||||
</varlistentry>
|
||||
</varlistentry>
|
||||
|
||||
<varlistentry>
|
||||
<term><option>--graph</option></term>
|
||||
<listitem>
|
||||
<para>
|
||||
Prints a graph of the closure of the store 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>
|
||||
<varlistentry><term><option>--graph</option></term>
|
||||
|
||||
<listitem><para>Prints a graph of the closure of the store
|
||||
expressions identified by <replaceable>args</replaceable> in the
|
||||
format of the <command>dot</command> tool of AT&T's GraphViz
|
||||
package.</para></listitem>
|
||||
|
||||
</refsection>
|
||||
</varlistentry>
|
||||
|
||||
</refsection>
|
||||
</variablelist>
|
||||
|
||||
</refsection>
|
||||
|
||||
|
||||
</refsection>
|
||||
|
||||
|
||||
|
||||
<!--######################################################################-->
|
||||
<!--######################################################################-->
|
||||
|
||||
<refsection>
|
||||
<title>Operation <option>--successor</option></title>
|
||||
<refsection id="rsec-nix-store-reg-val"><title>Operation <option>--register-validity</option></title>
|
||||
|
||||
<refsection>
|
||||
<title>Synopsis</title>
|
||||
<cmdsynopsis>
|
||||
<command>nix-store</command>
|
||||
<arg choice='req'><option>--successor</option></arg>
|
||||
<arg choice='plain'
|
||||
rep='repeat'><replaceable>srcpath</replaceable> <replaceable>sucpath</replaceable></arg>
|
||||
</cmdsynopsis>
|
||||
</refsection>
|
||||
<refsection><title>Synopsis</title>
|
||||
|
||||
<refsection>
|
||||
<title>Description</title>
|
||||
<cmdsynopsis>
|
||||
<command>nix-store</command>
|
||||
<arg choice='req'><option>--register-validity</option></arg>
|
||||
</cmdsynopsis>
|
||||
</refsection>
|
||||
|
||||
<refsection><title>Description</title>
|
||||
|
||||
<para>
|
||||
The operation <option>--successor</option> registers that the
|
||||
closure expression in <replaceable>sucpath</replaceable> is a
|
||||
successor of the derivation expression in
|
||||
<replaceable>srcpath</replaceable>. This is used to implement
|
||||
binary deployment.
|
||||
</para>
|
||||
<para>TODO</para>
|
||||
|
||||
</refsection>
|
||||
</refsection>
|
||||
|
||||
</refsection>
|
||||
</refsection>
|
||||
|
||||
|
||||
|
||||
<!--######################################################################-->
|
||||
<!--######################################################################-->
|
||||
|
||||
<refsection>
|
||||
<title>Operation <option>--substitute</option></title>
|
||||
<refsection><title>Operation <option>--substitute</option></title>
|
||||
|
||||
<refsection>
|
||||
<title>Synopsis</title>
|
||||
<cmdsynopsis>
|
||||
<command>nix-store</command>
|
||||
<arg choice='req'><option>--substitute</option></arg>
|
||||
<arg choice='plain'
|
||||
rep='repeat'><replaceable>srcpath</replaceable> <replaceable>subpath</replaceable></arg>
|
||||
</cmdsynopsis>
|
||||
</refsection>
|
||||
<refsection><title>Synopsis</title>
|
||||
|
||||
<refsection>
|
||||
<title>Description</title>
|
||||
<cmdsynopsis>
|
||||
<command>nix-store</command>
|
||||
<arg choice='req'><option>--substitute</option></arg>
|
||||
<arg choice='plain'
|
||||
rep='repeat'><replaceable>srcpath</replaceable> <replaceable>subpath</replaceable></arg>
|
||||
</cmdsynopsis>
|
||||
</refsection>
|
||||
|
||||
<refsection><title>Description</title>
|
||||
|
||||
<para>
|
||||
The operation <option>--substitute</option> registers that the
|
||||
store path <replaceable>srcpath</replaceable> can be built by
|
||||
realising the derivation expression in
|
||||
<replaceable>subpath</replaceable>. This is used to implement
|
||||
binary deployment.
|
||||
</para>
|
||||
<para>The operation <option>--substitute</option> registers that the
|
||||
store path <replaceable>srcpath</replaceable> can be built by
|
||||
realising the derivation expression in
|
||||
<replaceable>subpath</replaceable>. This is used to implement binary
|
||||
deployment.</para>
|
||||
|
||||
</refsection>
|
||||
</refsection>
|
||||
|
||||
</refsection>
|
||||
</refsection>
|
||||
|
||||
|
||||
|
||||
<!--######################################################################-->
|
||||
<!--######################################################################-->
|
||||
|
||||
<refsection>
|
||||
<title>Operation <option>--verify</option></title>
|
||||
<refsection><title>Operation <option>--verify</option></title>
|
||||
|
||||
<refsection>
|
||||
<title>Synopsis</title>
|
||||
<cmdsynopsis>
|
||||
<command>nix-store</command>
|
||||
<arg choice='req'><option>--verify</option></arg>
|
||||
</cmdsynopsis>
|
||||
</refsection>
|
||||
<refsection>
|
||||
<title>Synopsis</title>
|
||||
<cmdsynopsis>
|
||||
<command>nix-store</command>
|
||||
<arg choice='req'><option>--verify</option></arg>
|
||||
</cmdsynopsis>
|
||||
</refsection>
|
||||
|
||||
<refsection>
|
||||
<title>Description</title>
|
||||
<refsection><title>Description</title>
|
||||
|
||||
<para>
|
||||
The operation <option>--verify</option> verifies the internal
|
||||
consistency of the Nix database, and the consistency between
|
||||
the Nix database and the Nix store. Any inconsistencies
|
||||
encountered are automatically repaired. Inconsistencies are
|
||||
generally the result of the Nix store or database being
|
||||
modified by non-Nix tools, or of bugs in Nix itself.
|
||||
</para>
|
||||
<para>The operation <option>--verify</option> verifies the internal
|
||||
consistency of the Nix database, and the consistency between the Nix
|
||||
database and the Nix store. Any inconsistencies encountered are
|
||||
automatically repaired. Inconsistencies are generally the result of
|
||||
the Nix store or database being modified by non-Nix tools, or of bugs
|
||||
in Nix itself.</para>
|
||||
|
||||
</refsection>
|
||||
</refsection>
|
||||
|
||||
</refsection>
|
||||
</refsection>
|
||||
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -84,7 +84,7 @@
|
|||
</varlistentry>
|
||||
|
||||
|
||||
<varlistentry><term><option>--max-jobs</option> / <option>-j</option></term>
|
||||
<varlistentry id="opt-max-jobs"><term><option>--max-jobs</option> / <option>-j</option></term>
|
||||
|
||||
<listitem><para>Sets the maximum number of build jobs that Nix will
|
||||
perform in parallel to the specified number. The default is 1. A
|
||||
|
|
|
|||
|
|
@ -1112,7 +1112,7 @@ set, the attributes of which specify the inputs of the build.</para>
|
|||
|
||||
<itemizedlist>
|
||||
|
||||
<listitem><para>There must be an attribute named
|
||||
<listitem id="attr-system"><para>There must be an attribute named
|
||||
<varname>system</varname> whose value must be a string specifying a
|
||||
Nix platform identifier, such as <literal>"i686-linux"</literal> or
|
||||
<literal>"powerpc-darwin"</literal><footnote><para>To figure out
|
||||
|
|
|
|||
Loading…
Reference in a new issue