fweb-doc 1.62-13 / usr / share / doc / fweb / html-info / Customization.html

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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<!-- Created by GNU Texinfo 6.1, http://www.gnu.org/software/texinfo/ -->
<head>
<title>FWEB: Customization</title>

<meta name="description" content="FWEB: Customization">
<meta name="keywords" content="FWEB: Customization">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<link href="index.html#Top" rel="start" title="Top">
<link href="Concept-index.html#Concept-index" rel="index" title="Concept index">
<link href="Parameter-index.html#SEC_Contents" rel="contents" title="Table of Contents">
<link href="index.html#Top" rel="up" title="Top">
<link href="Environment-variables.html#Environment-variables" rel="next" title="Environment variables">
<link href="Merging-indexes.html#Merging-indexes" rel="prev" title="Merging indexes">
<style type="text/css">
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</head>

<body lang="en">
<a name="Customization"></a>
<div class="header">
<p>
Next: <a href="Hints.html#Hints" accesskey="n" rel="next">Hints</a>, Previous: <a href="Index.html#Index" accesskey="p" rel="prev">Index</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> &nbsp; [<a href="Parameter-index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-index.html#Concept-index" title="Index" rel="index">Index</a>]</p>
</div>
<hr>

<a name="CUSTOMIZATION"></a>
<h2 class="chapter">12 CUSTOMIZATION</h2>

<a name="index-Customization"></a>
<a name="index-Customizing-FWEB"></a>
<a name="index-FWEB_002c-customizing"></a>
<p>The default behavior of <small>FWEB</small> can be changed in a variety of ways.  
</p>
<blockquote>
<ol>
<li> <small>UNIX</small> environment variables (logical variables in VMS) affect path or
file names. 

</li><li> An initialization file resides in the home directory.

</li><li> A style file resides in the current directory.
</li></ol>
</blockquote>

<p>The initialization file (usually called <samp>.fweb</samp>) is intended to contain
command-line options (one per line) that are to be used in every run.
See <a href="Initialization.html#Initialization">Initialization</a>. 
</p>
<p>The style file (called <samp>fweb.sty</samp> by default; see <a href="_002dz.html#g_t_002dz">-z</a>) is
intended to provide more local customization, perhaps 
differing for each source file and group of source files.  The style
file does not contain command-line 
options; rather, it contains parameter settings that override
<small>FWEB</small>&rsquo;s defaults.  The &lsquo;<samp>-p</samp>&rsquo; option (see <a href="_002dp.html#g_t_002dp">-p</a>)
may be used to specify a style-file entry in <samp>.fweb</samp> (i.e., a
global value for all source files) or on the
command line (i.e., a value used for a single run).
</p>
<p>The order of processing is:
</p>
<blockquote>
<ol>
<li> Evaluate environment variables.  See <a href="Environment-variables.html#Environment-variables">Environment variables</a>.

</li><li> Read <samp>.fweb</samp> and remember its contents; sort those into three
groups:  options beginning with &lsquo;<samp>-</samp>&rsquo;, beginning with &lsquo;<samp>&amp;</samp>&rsquo;, and
beginning with a letter (file names) .  See <a href="Initialization.html#Initialization">Initialization</a>.

</li><li> Process <samp>.fweb</samp> options beginning with &lsquo;<samp>-</samp>&rsquo; (or &lsquo;<samp>+</samp>&rsquo;, for
backward compatibility), except for &lsquo;<samp>-p</samp>&rsquo;.

</li><li> Read and process command-line options, except for &lsquo;<samp>-p</samp>&rsquo;.  See <a href="Options.html#Options">Options</a>.

</li><li> Process remaining <samp>.fweb</samp> options (either file names, or options
beginning with &lsquo;<samp>&amp;</samp>&rsquo;).

</li><li> Process any &lsquo;<samp>-p</samp>&rsquo; options from <samp>.fweb</samp>.  See <a href="_002dp.html#g_t_002dp">-p</a>.

</li><li> Process the style file.  See <a href="Style.html#Style">Style</a>.

</li><li> Process any &lsquo;<samp>-p</samp>&rsquo; options from the command line.

</li></ol>
</blockquote>

<p>Unfortunately, because not all options are processed immediately when
they are read, errors may not show up when one expects.  For example,
nothing is actually processed while <samp>.fweb</samp> is being read; its
contents are just being stored.  It
could therefore happen that a syntax error in entering a &lsquo;<samp>-p</samp>&rsquo;
option in <samp>.fweb</samp> may not be reported until after the style file
has been read, possibly confusing the user as to the source of the
error.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top">&bull; <a href="Environment-variables.html#Environment-variables" accesskey="1">Environment variables</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Environment or logical variables.
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Initialization.html#Initialization" accesskey="2">Initialization</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Initialization file.
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Memory-allocation.html#Memory-allocation" accesskey="3">Memory allocation</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Dynamic memory allocation.
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Style.html#Style" accesskey="4">Style</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Style file.
</td></tr>
</table>

<hr>
<div class="header">
<p>
Next: <a href="Hints.html#Hints" accesskey="n" rel="next">Hints</a>, Previous: <a href="Index.html#Index" accesskey="p" rel="prev">Index</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> &nbsp; [<a href="Parameter-index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-index.html#Concept-index" title="Index" rel="index">Index</a>]</p>
</div>



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