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<!--
SPDX-FileCopyrightText: Copyright The SCons Foundation (https://scons.org)
SPDX-License-Identifier: MIT
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<!DOCTYPE reference [
<!ENTITY % version SYSTEM "../version.xml">
%version;
<!ENTITY % scons SYSTEM '../scons.mod'>
%scons;
]>

<refentry id='sconsign1'
          xmlns="http://www.scons.org/dbxsd/v1.0"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xsi:schemaLocation="http://www.scons.org/dbxsd/v1.0 http://www.scons.org/dbxsd/v1.0/scons.xsd">
<refmeta>
<refentrytitle>SCONSIGN</refentrytitle>
<manvolnum>1</manvolnum>
<refmiscinfo class='source'>SCons __VERSION__</refmiscinfo>
<refmiscinfo class='manual'>SCons __VERSION__</refmiscinfo>
</refmeta>
<refnamediv id='name'>
<refname>sconsign</refname>
<refpurpose>print SCons signature file information</refpurpose>
</refnamediv>
<!-- body begins here -->
<refsynopsisdiv id='synopsis'>
<cmdsynopsis>
  <command>sconsign</command>
    <arg choice='opt' rep='repeat'><replaceable>options</replaceable></arg>
    <arg choice='opt' rep='repeat'><replaceable>file</replaceable></arg>
</cmdsynopsis>
</refsynopsisdiv>


<refsect1 id='description'>
<title>DESCRIPTION</title>
<para>
Displays the contents of one or more
<firstterm>sconsign</firstterm> files,
the signature/dependency database
used by the &SCons; build tool.
The database contains all Nodes that are known to the build,
either by declaration in the build configuration,
produced as side effects, or detected by inspection.
</para>

<para>By default,
<command>sconsign</command>
dumps the entire contents of the
sconsign file(s).
Without options,
individual dependency entries are printed in the following format:</para>

<screen>
depfile: content-signature timestamp length
        implicit-dependency-1: content-signature timestamp length
        implicit-dependency-2: content-signature timestamp length
        ...
        build-signature [action-string]
</screen>

<para>
<emphasis role="bold">content-signature</emphasis>
is the hash of the file's contents (<firstterm>csig</firstterm>)
and <emphasis role="bold">build-signature</emphasis>
is the hash of the command line or other build action
used to build a target (<firstterm>bactsig</firstterm>).
If provided,
<emphasis role="bold">action-string</emphasis>
is the unexpanded string action or the function called.
<emphasis role="bold">None</emphasis>
is printed in place of any missing timestamp,
<emphasis role="bold">csig</emphasis>,
or <emphasis role="bold">bactsig</emphasis>
values for any entry or any of its dependencies.
If the entry has no implicit dependencies,
or no build action,
the corresponding lines are omitted.
</para>

<para>
An indicator line is printed for each directory,
as directories do not have signatures in the database
and so would not otherwise be shown.
</para>

<para>
By default,
<command>sconsign</command>
assumes that any
<replaceable>file</replaceable>
arguments that end with a
<filename>.dblite</filename>
suffix contains
signature entries for
more than one directory
(that is, was specified by the
<function>SConsignFile</function>
&SCons; function).
Any
<replaceable>file</replaceable>
argument that has no suffix
is assumed to be an old-style (deprecated)
sconsign file containing the signature entries
for a single directory.
If neither of those is true,
<command>sconsign</command>
attempts to guess the format.
If that does not work,
an explicit format
may be specified using the
<option>-f</option>
or
<option>--format=</option>
options.
</para>
<para>
If there are no
<replaceable>file</replaceable>
arguments, the name
<filename>.sconsign.dblite</filename>
is assumed by default.
</para>

</refsect1>

<refsect1 id='options'>
<title>OPTIONS</title>
<para>Various options control what information is printed
and the format:</para>

<variablelist>
  <varlistentry>
  <term>
    <option>-a</option>,
    <option>--act</option>,
    <option>--action</option>
  </term>
  <listitem>
<para>Prints only the build action information
for all entries or the specified entries.</para>

  </listitem>
  </varlistentry>
  <varlistentry>
  <term>
    <option>-c</option>,
    <option>--csig</option>
  </term>
  <listitem>
<para>Prints only the content signature (csig) information
for all entries or the specified entries.</para>

  </listitem>
  </varlistentry>
  <varlistentry>
  <term>
    <option>-d <replaceable>DIRECTORY</replaceable></option>,
    <option>--dir=<replaceable>DIRECTORY</replaceable></option>
  </term>
  <listitem>
<para>When the signatures are being
read from a
<filename>.dblite</filename>
file, or the
<option>-f dblite</option>
or
<option>--format=dblite</option>
options are used,
prints information about
only the signatures
for entries in the specified
<replaceable>DIRECTORY</replaceable>.</para>

  </listitem>
  </varlistentry>
  <varlistentry>
  <term>
    <option>-e <replaceable>ENTRY</replaceable></option>,
    <option>--entry=<replaceable>ENTRY</replaceable></option>
  </term>
  <listitem>
<para>Prints information about only the specified
<replaceable>ENTRY</replaceable>.
Multiple <option>-e</option> options may be used,
in which case information about each
<replaceable>ENTRY</replaceable>
is printed in the order in which the
options are specified on the command line.</para>

  </listitem>
  </varlistentry>
  <varlistentry>
  <term>
    <option>-f <replaceable>FORMAT</replaceable></option>,
    <option>--format=<replaceable>FORMAT</replaceable></option>
  </term>
  <listitem>
<para>The file(s) to be printed
are in the specified
<replaceable>FORMAT</replaceable>.
Legal values are
<emphasis role="bold">dblite</emphasis>
(the SCons.dblite format used by default,
as well as when the
<function>SConsignFile</function>
function is called, except when a filename argument
of <constant>None</constant> is given)
and
<emphasis role="bold">sconsign</emphasis>
(the format used for an individual
<filename>.sconsign</filename>
file in each directory).</para>

  </listitem>
  </varlistentry>
  <varlistentry>
  <term>
    <option>-h</option>,
    <option>--help</option>
  </term>
  <listitem>
<para>Prints a help message and exits.</para>

  </listitem>
  </varlistentry>
  <varlistentry>
  <term>
    <option>-i</option>,
    <option>--implicit</option>
  </term>
  <listitem>
<para>Prints the list of cached implicit dependencies
for all entries or for the specified entries.</para>

  </listitem>
  </varlistentry>
  <varlistentry>
  <term><option>--raw</option></term>
  <listitem>
<para>Prints a pretty-printed representation
of the raw Python dictionary that holds
build information about individual entries
(both the entry itself and its implicit dependencies).
An entry's build action is still printed in its usual format.</para>

  </listitem>
  </varlistentry>
  <varlistentry>
  <term>
    <option>-r</option>,
    <option>--readable</option>
  </term>
  <listitem>
<para>Prints timestamps in a human-readable string,
enclosed in single quotes.</para>

  </listitem>
  </varlistentry>
  <varlistentry>
  <term>
    <option>-t</option>,
    <option>--timestamp</option>
  </term>
  <listitem>
<para>Prints the timestamp information
for all entries or the specified entries.</para>

  </listitem>
  </varlistentry>
  <varlistentry>
  <term>
    <option>-v</option>,
    <option>--verbose</option>
  </term>
  <listitem>
<para>Prints labels identifying each field being printed.</para>

  </listitem>
  </varlistentry>
</variablelist>
</refsect1>

<refsect1 id='environment'>
<title>ENVIRONMENT</title>
<variablelist>
  <varlistentry>
  <term><envar>SCONS_LIB_DIR</envar></term>
  <listitem>
<para>Specifies the directory that contains the SCons Python module directory
(e.g.
<filename class='directory'>/home/aroach/scons-src/SCons</filename>).
</para>

  </listitem>
  </varlistentry>
</variablelist>
</refsect1>

<refsect1 id='see_also'>
<title>SEE ALSO</title>
<para>
The &SCons; reference (manpage) at
<ulink url="https://scons.org/doc/production/HTML/scons-man.html"/>,
the SCons User Guide at
<ulink url="https://scons.org/doc/production/HTML/scons-user.html"/>,
the SCons source code
<ulink url="https://github.com/SCons/scons">
on GitHub</ulink>.
</para>
</refsect1>

<refsect1 id='authors'>
<title>AUTHORS</title>
<para>Originally: Steven Knight <email>knight@baldmt.com</email>
  and Anthony Roach <email>aroach@electriceyeball.com</email>.</para>
  <para>
Since 2010: The SCons Development Team <email>scons-dev@scons.org</email>.
</para>
</refsect1>
</refentry>