File: as_graphviz

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libgraph-easy-perl 0.71-1
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#!/usr/bin/perl -w

#############################################################################
# This example is a bit outdated, please use the new bin/graph-easy script -
# which is after "make install" available on any command line in your system.

# Convert an input file containing a Graph::Easy description to
# graphviz output that can be feed to dot etc.

# Example usage:
#  examples/as_graphviz t/in/2nodes.txt | dot -Tpng >test.png
#  echo "[ A ] -> [ B ]" | examples/as_graphviz | dot -Tpng >test.png

BEGIN { $|++; }

use strict;
use lib 'lib';
use Graph::Easy::Parser;

my $file = shift;

my $parser = Graph::Easy::Parser->new( debug => 0 );

if (!defined $file)
  {
  $file = \*STDIN;
  binmode STDIN, ':utf8' or die ("binmode STDIN, ':utf8' failed: $!");
  }
binmode STDERR, ':utf8' or die ("binmode STDERR, ':utf8' failed: $!");
my $graph = $parser->from_file( $file );

die ($parser->error()) unless defined $graph;
binmode STDOUT, ':utf8' or die ("binmode STDOUT, ':utf8' failed: $!");
print $graph->as_graphviz();