How to touch a file and mkdir if needed in one line

Question

I need to touch a file with an absolute file name such as: /opt/test/test.txt, but I\'m not sure if there is /opt/test existed on the system. So the code should similar with thi

Answer 1

I have this shell function in my .zshalias file:

function touch-safe {
    for f in "$@"; do
      [ -d $f:h ] || mkdir -p $f:h && command touch $f
    done
}
alias touch=touch-safe

If either the test or the mkdir command fail, no touch command is invoked.