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#!/usr/bin/perl -w
use strict;
no locale;
my %items;
my $item_key;
$/ = '';
while (<>) {
if (/^=item\s+(.+)/) {
# new item
$item_key = get_item_key($1);
$items{$item_key} .= $_;
} elsif (/^=back\b/) {
# no more items in this group
foreach my $item_key (sort keys %items) {
print $items{$item_key};
}
$item_key = undef;
%items = ();
print;
} elsif (defined $item_key) {
# part of the current item
$items{$item_key} .= $_;
} else {
# not part of an item
print;
}
}
if (keys %items) {
warn "Missing =back after final =item.\n";
foreach my $item_key (sort keys %items) {
print $items{$item_key};
}
}
# get the sortable key for an item
sub get_item_key {
my($item) = @_;
# remove POD formatting
$item =~ s/[A-Z]<(.*?)>/$1/g;
# remove printf-style escapes
# note: be careful not to remove things like %hash
$item =~ s/%(?:[scg]|lx|#o)//g;
# remove all non-letter characters
$item =~ tr/A-Za-z//cd;
return lc $item;
}
__END__
=pod
=head1 NAME
sort_perldiag.pl - Sort warning and error messages in perldiag.pod
=head1 SYNOPSIS
B<sort_perldiag.pl> I<file>
=head1 DESCRIPTION
B<sort_perldiag.pl> is a script for sorting the warning and error
messages in F<perldiag.pod>. POD formatting, printf-style escapes,
non-letter characters, and case are ignored, as explained in L<perldiag>.
=cut
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