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#! /usr/bin/perl -w
# generate_history.pl -- flatten release notes for use as HISTORY file
#
# Usage: generate_history.pl srcdir release.sgml >output.sgml
#
# The main point of this script is to strip out <link> references, which
# generally point into the rest of the documentation and so can't be used
# in a standalone build of the release notes. To make sure this is done
# everywhere, we have to fold in the sub-files of the release notes.
#
# $PostgreSQL: pgsql/doc/src/sgml/generate_history.pl,v 1.1 2009/05/02 20:17:19 tgl Exp $
use strict;
my($srcdir) = shift;
defined($srcdir) || die "$0: missing required argument: srcdir\n";
my($infile) = shift;
defined($infile) || die "$0: missing required argument: inputfile\n";
# Emit DOCTYPE header so that the output is a self-contained SGML document
print "<!DOCTYPE appendix PUBLIC \"-//OASIS//DTD DocBook V4.2//EN\">\n";
process_file($infile);
exit 0;
sub process_file {
my($filename) = @_;
local *FILE; # need a local filehandle so we can recurse
my($f) = $srcdir . '/' . $filename;
open(FILE, $f) || die "could not read $f: $!\n";
while (<FILE>) {
# Recursively expand sub-files of the release notes
if (m/^&(release-.*);$/) {
process_file($1 . ".sgml");
next;
}
# Remove <link ...> tags, which might span multiple lines
while (m/<link/) {
if (s/<link\s+linkend[^>]*>//) {
next;
}
# incomplete tag, so slurp another line
$_ .= <FILE>;
}
# Remove </link> too
s|</link>||g;
print;
}
close(FILE);
}
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