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 # mamgal - a program for creating static image galleries  | 
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 # Copyright 2009-2008 Marcin Owsiany   | 
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 # See the README file for license information  | 
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 # A class for checking existance of commands, basically a wrapper for  | 
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 # "which(1)"  | 
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 package App::MaMGal::CommandChecker;  | 
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 use strict;  | 
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 use warnings;  | 
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 use base 'App::MaMGal::Base';  | 
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 use Carp;  | 
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 {  | 
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 	my $self = shift;  | 
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 	croak "No arguments allowed" if @_;  | 
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 sub is_available  | 
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 {  | 
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 	my $self = shift;  | 
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 	my $command = shift or croak 'One argument required';  | 
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100
  
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 	croak 'Just one argument allowed' if @_;  | 
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 	system("which $command >/dev/null 2>&1") == 0;  | 
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 }  | 
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