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<varlistentry>
<term><option>--verbose</option> / <option>-v</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; 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>
<quote>Errors only</quote>: only print messages explaining
why the Nix invocation failed.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>1</term>
<listitem>
<para>
<quote>Informational</quote>: print
<emphasis>useful</emphasis> messages about what Nix is
doing.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>2</term>
<listitem>
<para>
<quote>Talkative</quote>: print more informational messages.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>3</term>
<listitem>
<para>
<quote>Chatty</quote>: print even more informational messages.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>4</term>
<listitem>
<para>
<quote>Debug</quote>: print debug information:
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>5</term>
<listitem>
<para>
<quote>Vomit</quote>: print vast amounts of debug
information.
</para>
</listitem>
</varlistentry>
</variablelist>
</listitem>
</varlistentry>
|
