/usr/share/doc/fweb/html-info/Change-files.html is in fweb-doc 1.62-13.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 | <!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: Change files</title>
<meta name="description" content="FWEB: Change files">
<meta name="keywords" content="FWEB: Change files">
<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="Files.html#Files" rel="up" title="Files">
<link href="Starting.html#Starting" rel="next" title="Starting">
<link href="Output-files.html#Output-files" rel="prev" title="Output files">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
blockquote.indentedblock {margin-right: 0em}
blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
blockquote.smallquotation {font-size: smaller}
div.display {margin-left: 3.2em}
div.example {margin-left: 3.2em}
div.lisp {margin-left: 3.2em}
div.smalldisplay {margin-left: 3.2em}
div.smallexample {margin-left: 3.2em}
div.smalllisp {margin-left: 3.2em}
kbd {font-style: oblique}
pre.display {font-family: inherit}
pre.format {font-family: inherit}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
pre.smalldisplay {font-family: inherit; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: inherit; font-size: smaller}
pre.smalllisp {font-size: smaller}
span.nolinebreak {white-space: nowrap}
span.roman {font-family: initial; font-weight: normal}
span.sansserif {font-family: sans-serif; font-weight: normal}
ul.no-bullet {list-style: none}
-->
</style>
</head>
<body lang="en">
<a name="Change-files"></a>
<div class="header">
<p>
Previous: <a href="Output-files.html#Output-files" accesskey="p" rel="prev">Output files</a>, Up: <a href="Files.html#Files" accesskey="u" rel="up">Files</a> [<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="Change-files-1"></a>
<h3 class="section">3.3 Change files</h3>
<a name="index-Files_002c-change"></a>
<p>The primary input to the <small>FWEB</small> processors is the <samp>test.web</samp>
source file. However, a <em>change file</em> <samp>test.ch</samp> can also be
specified. A change file consists of instances of the following
structure:
</p>
<div class="example">
<pre class="example">@x
(One or more lines of text, EXACTLY as in the web file. Copy these
lines with an editor; don't type them from scratch.)
@y
(Replacement text.)
@z
</pre></div>
<p>The change-file mechanism allows one to insert local changes or test new
code without physically modifying the original web file.
</p>
<p>To specify a change file, use its name as the second file name on the
command line. The extension ‘<samp>.ch</samp>’ is assumed by default. For
example,
</p>
<div class="example">
<pre class="example">ftangle test test
</pre></div>
<p>processes <samp>test.web</samp> with the change file <samp>test.ch</samp>.
</p>
<a name="index-_0040_005b"></a>
<a name="index-_0040_005d"></a>
<p>In addition to ‘<samp>@x</samp>’, ‘<samp>@y</samp>’, and ‘<samp>@z</samp>’, the only
‘<samp>@</samp>’ commands allowed in a change file are language-changing
commands such as ‘<samp>@c</samp>’ and the special commands ‘<samp>@[</samp>’ and
‘<samp>@]</samp>’. The command ‘<samp>@[</samp>’ is used for column-oriented
languages such as <small>FORTRAN</small>–77 and means <em>switch into code
mode</em>. Similarly, ‘<samp>@]</samp>’ means <em>switch out of code mode</em>.
</p>
<p>All ‘<samp>@</samp>’ commands in a change file must begin in column 1. Lines
not beginning with ‘<samp>@</samp>’ are ignored, so may be used as comments.
Comments may also be included on the ‘<samp>@x</samp>’, ‘<samp>@y</samp>’, and/or
‘<samp>@z</samp>’ lines.
</p>
</body>
</html>
|