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New feature: a -links option, when generating html output, creates

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symbolic links for each cross reference label in the source file, thus
allowing external documents to link to a more or less fixed target,
rather that the numbered files which can change whenever the target
document is modified.

Bug fix: warn when a reference is made to a nonexistant label.
This commit is contained in:
John Fieber 1995-06-30 15:19:12 +00:00
parent 67c347acbd
commit bbba09f659
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=9377
2 changed files with 82 additions and 11 deletions
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29
usr.bin/sgmlfmt/sgmlfmt.1
View File

@ -1,4 +1,4 @@
.Dd May 6, 1995
.Dd June 30, 1995
.Os FreeBSD 2.0.5
.Dt SGMLFMT 1
.Sh NAME
@ -6,7 +6,8 @@
.Nd Formats SGML files tagged according to the linuxdoc DTD.
.Sh SYNOPSIS
.Nm
.Fl Ar format Op Fl Ar format...
.Fl Ar format Op Fl Ar format...
.Op Fl Ar links
.Ar
.Sh DESCRIPTION
The
@ -58,6 +59,23 @@ or
This is actually an intermediate conversion used by the
.Fl ascii
format option.
.It Fl links
When used with the
.Fl html
option, for each <label id="foo"> in the document source
.Nm
generates a symbolic link
.Pa foo.html
pointing to the numbered
.Pa .html
file containing the reference. Since the number of the file
containing a particular section can change when a document
is modified, this provides a convenient hook by which separate
documents can provide links into another document without the
links becoming invalid when the target document is modified.
When creating a symbolic link, any occurence of a slash (/) in label
is replaced with percent (%), while any occurence of a space is replaced
with an underscore (_).
.El
.Pp
If the input file name ends with
@ -95,11 +113,14 @@ The linuxdoc DTD was written by Matt Welsh
and based on the Qwertz DTD written by Tom Gordon
.Aq thomas.gordon@gmd.de .
.Sh BUGS
The ASCII output has many, many bugs including no table of
contents, no meaningful cross references, and numerous formatting
errors.
.Pp
A line in the SGML source file beginning with a period (.) will
confuse
.Xr groff 1
which is used to generate ASCII output. In general, the ASCII
output leaves much to be desired.
which is used to generate ASCII output.
.Pp
The divison of the sources file into separate HTML files is
currently fixed.

64
usr.bin/sgmlfmt/sgmlfmt.pl
View File

@ -1,11 +1,11 @@
#!/usr/bin/perl
# $Id: sgmlfmt.pl,v 1.1.1.1 1995/05/09 23:58:06 jfieber Exp $
# $Id: sgmlfmt.pl,v 1.2 1995/05/18 03:01:28 jfieber Exp $
# Format an sgml document tagged according to the linuxdoc DTD.
# by John Fieber <jfieber@freebsd.org> for the FreeBSD documentation
# project.
#
# Usage: sgmlformat -format [-format ...] inputfile [inputfile ...]
# Usage: sgmlformat -format [-format ...] [-links] inputfile [inputfile ...]
#
# -format outputfile format
# -------------------------------------------------------------
@ -15,6 +15,9 @@
# -nroff inputfile.nroff groff for ms macros
# -ps inputfile.txt postscript
#
# -links For each <label id="foo">, make a symbolic
# link foo.html -> inputfile-n.html.
#
# Bugs:
#
# Text lines that start with a period (.) confuse the conversions that
@ -254,6 +257,9 @@ sub gen_html {
s/^<@@label>//;
if ($references{$_} eq "") {
$references{$_} = "$filecount";
if ($genlinks) {
&extlink($_, "${fileroot}-${filecount}.html");
}
}
else {
print STDERR "Warning: the label `$_' is multiply-defined.\n";
@ -262,10 +268,8 @@ sub gen_html {
}
close(bar);
# print STDERR " Pass 2...";
open(foofile, $tmpfile);
&html2html(foofile, "boo");
# print STDERR ")\n";
unlink($tmpfile);
}
@ -466,8 +470,13 @@ sub html2html {
if (s/^<@@ref>//) {
chop;
$refname = $_;
$text[$st_ol[$sc]] .=
"<A HREF=\"${fileroot}-$references{$_}.html#$refname\">";
if ($references{$_} eq "") {
print "Warning: Reference to $_ has no defined target\n";
}
else {
$text[$st_ol[$sc]] .=
"<A HREF=\"${fileroot}-$references{$_}.html#$_\">";
}
last tagsw;
}
if (s/^<@@endref>//) {
@ -507,6 +516,10 @@ sub html2html {
close tocfile;
}
# navbar
#
# Generate a navigation bar to go on the top and bottom of the page.
sub navbar {
local ($fnum, $fmax, $sc) = @_;
@ -536,8 +549,37 @@ sub navbar {
}
# extlink
#
# creates a symbolic link from the name in a reference to the numbered
# html file. Since the file number that any given section has is
# subject to change as the document goes through revisions, this allows
# for a fixed target that separate documents can hook into.
#
# Slashes (/) in the reference are converted to percents (%) while
# spaces ( ) are converted to underscores (_);
sub extlink {
local ($ref, $fn) = @_;
$ref =~ s/\//%/g;
$ref =~ s/ /_/g;
$file = "$ref.html";
if (-e $file) {
if (-l $file) {
unlink($file);
symlink($fn, $file);
}
else {
print "Warning: $file exists and is not a symbolic link\n";
}
}
else {
symlink($fn, $file);
}
}
# Now, read the command line and take appropriate action
@ -556,7 +598,15 @@ for (@ARGV) {
for ($i = 0; $i < $fcount; $i++) {
if (&getfile($infiles[$i])) {
if ($gen{'html'}) {
print "generating $fileroot.html...\n"; &gen_html(); }
print "generating $fileroot.html";
if ($gen{'links'}) {
$genlinks = 1;
print " with external links";
}
else {
$genlinks = 0;
}
print "...\n"; &gen_html(); }
if ($gen{'tex'} || $gen{'latex'}) {
print "generating $fileroot.tex...\n"; &gen_latex(); }
if ($gen{'nroff'}) {