=head1 NAME

genhelp - Build vcp_html/... by extracting POD from the listed files

=head1 SYNOPSYS

    genhtml lib/VCP.pm lib/VCP/Foo.pm ...

=head1

When bundling libraries and POD files with PAR <= 0.79, it is difficult
to find and parse the files to generate html with.  So we extract it
and build it as an HTML directory.

See Makefile.PL for how this tool is automated.

=cut

use strict;

my $prog_name = "vcp";
my $dest_dir;

unless ( defined $dest_dir && length $dest_dir ) {
   $dest_dir = $prog_name . "_html";
}

use File::Spec;
$dest_dir = File::Spec->rel2abs( $dest_dir );

$| = 1;
warn "Generating HTML in $dest_dir/";

use Cwd;
my $start_dir = cwd;

use Pod::Links;
use Pod::HTML_Elements;
use File::Path;
use IO::File;

## BEGIN CODE ADAPTED FROM NICK ING-SIMMONS' PodToHTML package
my $links = Pod::Links->new();
for my $fn ( @ARGV ) {
   print ".";
   $links->parse_from_file($fn);
}

for my $name ($links->names) {
   $links->link(
      $name,
      do {
         my $outfile = $name;
         $outfile =~ s#::#/#g;
         $outfile =~ s#[^/a-z0-9A-Z._-]#_#g;
         $outfile .= ".html";
#File::Spec->catfile( $dest_dir, $outfile );
         $outfile;
      }
   ) if $links->pod($name);
}

my $index_file = File::Spec->catfile( $dest_dir, "index.html" );

my $parser = Pod::HTML_Elements->new(
   Index => $index_file,
   Links => $links,
);

## the sort {} makes sure "vcp" is listed first in the
## resulting index.
mkdir $dest_dir;
chdir $dest_dir or die "$!: $dest_dir";

for my $name (
   sort {
      $a eq "vcp"
         ? -1
         : $b eq "vcp"
            ? 1
            : $a cmp $b
   } $links->names
) {
   print ".";
   my $file = File::Spec->rel2abs( $links->pod($name), $start_dir );
   my $outfile = $links->link($name);
   if (defined $file) {
      File::Path::mkpath( File::Basename::dirname( $outfile ), 0, 0755 );
      $parser->parse_from_file( $file, $outfile );
   }
}

$parser->write_index;
## END CODE ADAPTED FROM NICK ING-SIMMONS' PodToHTML package
print "\n";

print "Finished, index file is $index_file\n";