Scripts boilerplate

Common operations that we usually want to perform in bash scripts.

Functions

print_hello () {
  echo "Hello $1"
}

hello "sir"

Want to combine grep and if to do something in case a string is find or not ?

if grep --quiet text somefile.txt; then
  echo "Text Found"
else
  echo "Text not Found"
fi

Check if an argument has been set:

if [ -z "$1" ]
  then
    echo "No argument supplied"
fi

script_dir=$(cd "$(dirname "${BASH_SOURCE[0]}")" &>/dev/null && pwd -P)