Bash Cookbook

How it works...

The creation of mytree.sh is a trivial task, but the logic inside follows recursive functions. There is also the concept of ${CURRENT_LVL}, which is used to produce the number of periods (or levels) deep the script is from its original starting point: parentdir. In each directory, we create a for loop to test each file/directory inside of it. The logic tests whether the entry is either a file or a director. If it is a directory, we increment ${CURRENT_LVL} and then recursively execute the same logic inside of the recursive_tree function until done and then return. If the logic is a file, we merely print out and continue. The tab_creator function makes the variable string for the periods based on ${CURRENT_LVL} and concatenation. ...