contrib/dump-asy.pl: add prerequisites check and fix warnings about empty container names
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@ -15,6 +15,12 @@ use AnyEvent::I3;
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use File::Temp;
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use File::Basename;
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use v5.10;
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use IPC::Cmd qw[can_run];
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# prerequisites check so we can be specific about failures caused
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# by not having these tools in the path
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can_run('asy') or die 'Please install asymptote';
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can_run('gv') or die 'Please install gv';
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my $i3 = i3();
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@ -31,7 +37,7 @@ sub dump_node {
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my $o = ($n->{orientation} eq 'none' ? "u" : ($n->{orientation} eq 'horizontal' ? "h" : "v"));
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my $w = (defined($n->{window}) ? $n->{window} : "N");
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my $na = $n->{name};
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my $na = ($n->{name} or "[Empty]");
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$na =~ s/#/\\#/g;
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$na =~ s/\$/\\\$/g;
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$na =~ s/&/\\&/g;
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