Splitting camelcase paths at uppercase letters in Linux

Question

Working in a linux tcsh shell I'd like to echo a camelcase directory name, in lower case, with the separate parts of the name split up e.g in my PWD, iWantToSplitThisUp >> i want to split this up.

Thanks in advance

Answer 1

echo $dirname | sed -e 's/\([a-z]\)\([A-Z]\)/\1 \2/g' | tr A-Z a-z