/usr/lib/swi-prolog/doc/Manual/initgoal.html

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<H2><A NAME="sec:2.3"><SPAN class="sec-nr">2.3</SPAN> <SPAN class="sec-title">Initialisation 
files and goals</SPAN></A></H2>

<A NAME="sec:initgoal"></A>

<P>Using command-line arguments (see <A class="sec" href="cmdline.html">section 
2.4</A>), SWI-Prolog can be forced to load files and execute queries for 
initialisation purposes or non-interactive operation. The most commonly 
used options are
<STRONG>-f</STRONG> <VAR>file</VAR> or <STRONG>-s</STRONG> <VAR>file</VAR> 
to make Prolog load a file,
<STRONG>-g</STRONG> <VAR>goal</VAR> to define an initialisation goal and
<STRONG>-t</STRONG> <VAR>goal</VAR> to define the <EM>top-level goal</EM>. 
The following is a typical example for starting an application directly 
from the command-line.

<PRE class="code">
machine% swipl -s load.pl -g go -t halt
</PRE>

<P>It tells SWI-Prolog to load <CODE>load.pl</CODE>, start the 
application using the <EM>entry-point</EM> go/0 and ---instead of 
entering the interactive top-level--- exit after completing go/0 . The
<STRONG>-q</STRONG> may be used to suppress all informational messages.

<P>In MS-Windows, the same can be achieved using a short-cut with 
appropriately defined command-line arguments. A typically seen 
alternative is to write a file <CODE>run.pl</CODE> with content as 
illustrated below. Double-clicking <CODE>run.pl</CODE> will start the 
application.

<PRE class="code">
:- [load].                      % load program
:- go.                          % run it
:- halt.                        % and exit
</PRE>

<P><A class="sec" href="compilation.html">Section 2.10.2.1</A> discusses 
further scripting options and
<A class="sec" href="runtime.html">chapter 10</A> discusses the 
generation of runtime executables. Runtime executables are a mean to 
deliver executables that do not require the Prolog system.

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swi-prolog-nox 5.10.4-3ubuntu1 / usr / lib / swi-prolog / doc / Manual / initgoal.html
