Bash simple run script

make_output_bash_script.sh

#!/bin/bash

PROGRAM=DEFAULT
FOLDER_TO_EXECUTE="$HOME/$PROGRAM"
CURR_FOLDER="$(pwd)"

# How to run
#
# 1. Copy this script to /usr/bin
#    sudo cp output.sh /usr/bin/genoutput
# 2. Give execute permissions
#    sudo chmod u+x /usr/bin/genoutput
# 3. Restart your bash terminal, and call genoutput

if [ $# -eq 0 ]; then
    echo "No arguments provided"
    helper
    exit 1
fi

if ! [[ "$CURR_FOLDER" == "$FOLDER_TO_EXECUTE" ]]; then
  printf "Current folder (%s) is not $FOLDER_TO_EXECUTE\n" "$CURR_FOLDER"
  echo "This script can be run only inside of $DEFAULT folder"
  exit 1
fi


SPACE="\n\n\n\n\n\n"
LINE=`printf '_%.0s' {1..80}`

function helper {
  printf "Usage: output.sh <build_command> <run_command>\n"
  printf "Example: output.sh \"make build\" \"make run\"\n"
}

function space {
  printf "$SPACE"
}

function running {
  printf "Running: %s\n" "$1"
  printf "$LINE$SPACE"
}

function run {
  # Steps are run in background and the output is piped to a file
  (
    running "$1";\
    $1;\
    printf $SPACE;\
    running "$2";\
    $2\
  ) | tee /mnt/d/make_output
}

# Switch case statement
case "$1" in
  "api")
    run "make" "make test"
    ;;
  "app")
    run "make build" "make build_app"
    ;;
  *)
    helper
    ;;
esac

# (make ; printf '=%.0s' {1..100}; printf '\n';  make test) | tee /mnt/d/make_output
# (make build ; printf '\n\n\n'; printf '_%.0s' {1..100}; printf '\n\n\n';  make build_app) | tee /mnt/d/make_output