POSIX parent directory path

parent_path.sh

# https://unix.stackexchange.com/questions/76505/portable-way-to-get-scripts-absolute-path
currpath=$(cd -P -- "$(dirname -- "$0")" && printf '%s\n' "$(pwd -P)/$(basename -- "$0")")
currdirname=$(dirname $currpath)
currfilename=$(basename $currpath)

# https://stackoverflow.com/questions/5947742/how-to-change-the-output-color-of-echo-in-linux

# Black        0;30     Dark Gray     1;30
# Red          0;31     Light Red     1;31
# Green        0;32     Light Green   1;32
# Brown/Orange 0;33     Yellow        1;33
# Blue         0;34     Light Blue    1;34
# Purple       0;35     Light Purple  1;35
# Cyan         0;36     Light Cyan    1;36
# Light Gray   0;37     White         1;37

# And then use them like this in your script:
#    .---------- constant part!
#    vvvv vvvv-- the code from above
RED='\033[0;31m'
NC='\033[0m' # No Color
printf "I ${RED}love${NC} Stack Overflow\n"