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perl -MFile::Find -le 'find sub{$x+=-s$_},shift;print$x' some_dir

perl -MFile::Find -le 'find sub{return if/^\.$/;$x+=-s$_},shift;print$
+x' some_dir

perl -le 'sub r{$r=shift;print(chop$r),r($r)if$r}r("noisrucer")'