Quick and dirty wrapper around Graph::Easy

graph_from_text.pl

#!/usr/bin/perl
# graph_from_text
# Copyright (C) Eskild Hustvedt 2007
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

use strict;
use warnings;
use utf8;

use Graph::Easy::Parser;

# Purpose: Check for a file in path
# Usage: InPath(FILE)
sub InPath {
	foreach (split /:/, $ENV{PATH}) { if (-x "$_/@_" and ! -d "$_/@_" ) {	return 1; } } return 0;
}

die("Needs at least one parameter: file to work on.\n") if not @ARGV;

my $file = shift(@ARGV);
die("$file: does not exist\n") if not -e $file;
my $outfile = $file;
$outfile =~ s/\.\w\w\w\w?$//;

my $g = Graph::Easy::Parser->new();
my $p = $g->from_file($file);
if (defined($ARGV[0]) and $ARGV[0] eq 'ascii')
{
	print $p->as_ascii();
}
elsif (defined($ARGV[0]) and $ARGV[0] eq 'html')
{
	$outfile .= '.html';
	print "Writing $outfile...";
	open(my $OUT,'>',$outfile) or die ("Can't open file $outfile: $!\n");
	no warnings; # Avoid 'wide character in print' errors
	print $OUT $p->as_html_file();
	use warnings;
	close($OUT);
	print "done\n";
}
else 
{
	die("You don't appear to have 'dot' installed. Please install graphviz, then re-run this program.\n") if not InPath('dot');
	$outfile .= '.png';
	$| = 1;
	print "Writing $outfile...";
	my $graphviz = $p->as_graphviz();
	my $dotProg = 'dot';
	if($ENV{DOT_REPLACEMENT})
	{
		$dotProg = $ENV{DOT_REPLACEMENT};
	}
	open my $DOT, '|'.$dotProg.' -Tpng -o '.$outfile or die ("Cannot open pipe to dot: $!");
	print $DOT $graphviz;
	close $DOT;
	print "done\n";
}