Improvements to a shell script

dracula-vim-#117-script-improvements.sh

#! /bin/bash

# stricter bash
# http://redsymbol.net/articles/unofficial-bash-strict-mode/
set -euo pipefail

# variables
STRINGA_TROVARE='curl'
CARTELLA_SYM_LINK=trovata_"$STRINGA_TROVARE"/
CARTELLA_OUTPUT='/home/nethogs/nethogs_log'
FILE_OUTPUT="$( date +"%Y%m%d_%H-$( date +"%H" -d '+1 hour' )" )"
COMMANDO=(
  sudo /usr/sbin/nethogs
  -t
  -d 3600
  -v 1
  -c 2
  -s
)

# guessing at appropriate function names, obviously
run_command() {
  mkdir -p "$CARTELLA_OUTPUT"
  "${COMMANDO[@]}" >> "$CARTELLA_OUTPUT$FILE_OUTPUT"
}

check_output() {
  grep -c "$STRINGA_TROVARE" "$CARTELLA_OUTPUT$FILE_OUTPUT"
}

make_symlink_if_output() {
  if check_output ; then
    mkdir -p "$CARTELLA_SYM_LINK"
    ln -s "$CARTELLA_OUTPUT$FILE_OUTPUT" "$CARTELLA_SYM_LINK$FILE_OUTPUT"
  fi
}

main() {
  run_command
  make_symlink_if_output
}

main