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# /usr/bin/perl
# Copyright (c) 2025, PostgreSQL Global Development Group
# doc/src/sgml/sgml_syntax_check.pl
use strict;
use warnings FATAL => 'all';
use Getopt::Long;
use File::Find;
my $xmllint;
my $srcdir;
my $builddir;
GetOptions(
'xmllint:s' => \$xmllint,
'srcdir:s' => \$srcdir,
'builddir:s' => \$builddir) or die "$0: wrong arguments";
die "$0: --srcdir must be specified\n" unless defined $srcdir;
my $xmlinclude = "--path . --path $srcdir";
$xmlinclude .= " --path $builddir" if defined $builddir;
# find files to process - all the sgml and xsl files (including in subdirectories)
my @files_to_process;
my @dirs_to_search = ($srcdir);
push @dirs_to_search, $builddir if defined $builddir;
find(
sub {
return unless -f $_;
return if $_ !~ /\.(sgml|xsl)$/;
push @files_to_process, $File::Find::name;
},
@dirs_to_search,);
# tabs and non-breaking spaces are harmless, but it is best to avoid them in SGML files
sub check_tabs_and_nbsp
{
my $errors = 0;
for my $f (@files_to_process)
{
open my $fh, "<:encoding(UTF-8)", $f or die "Can't open $f: $!";
my $line_no = 0;
while (<$fh>)
{
$line_no++;
if (/\t/)
{
print STDERR "Tab found in $f:$line_no\n";
$errors++;
}
if (/\xC2\xA0/)
{
print STDERR "$f:$line_no: contains non-breaking space\n";
$errors++;
}
}
close($fh);
}
if ($errors)
{
die "Tabs and/or non-breaking spaces appear in SGML/XML files\n";
}
}
sub run_xmllint
{
my $cmd = "$xmllint $xmlinclude --noout --valid postgres.sgml";
system($cmd) == 0 or die "xmllint validation failed\n";
}
run_xmllint();
check_tabs_and_nbsp();
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