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module Utils
def self.svn_available?
return @svn if instance_variable_defined?(:@svn)
@svn = quiet_system HOMEBREW_SHIMS_PATH/"scm/svn", "--version"
end
def self.svn_remote_exists(url)
return true unless svn_available?
quiet_system "svn", "ls", url, "--depth", "empty"
end
end
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