ENV returns nil, not empty strings
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@ -23,7 +23,7 @@ module VagrantPlugins
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# if we're on a system that doesn't support exec, so handle that properly.
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def execute(uploader)
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cmd = []
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cmd << "-debug" if !Vagrant.log_level.empty?
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cmd << "-debug" if !Vagrant.log_level.nil?
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cmd << "-vcs" if config.vcs
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cmd += config.includes.map { |v| ["-include", v] }
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cmd += config.excludes.map { |v| ["-exclude", v] }
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