remove leading zeroes Fish script

remove-leading-zeroes.fish

#!/usr/bin/env fish
# remove leading zeroes from JPG file names
# e.g. page001.jpg => page1.jpg

set start (pwd)

for dir in (ls)
    echo "About to rename files in $dir"
    # optional, makes me less afraid when I step through one folder at a time
    read
    # this works around cd-ing into a file; silence error & skip next command(s)
    cd $dir 2>/dev/null
    and begin
        # file extensions could be .jpg, .JPEG, etc.
        # only need to run twice as our names are like "page001.JPG"
        rename -v 's/0([0-9])/$1/' *.jp* *.JP*
        rename -v 's/0([0-9])/$1/' *.jp* *.JP*
    end
    # if we're not in the start directory, move back up
    if [ ! $start = (pwd) ]
        cd -
    end
end