#!/usr/bin/env bash
# Shellcheck the script
# Note: using bash for more power in testing (the final user doesn't need it).

# Global Variables
G_NANO_VERSION="4.6.0"
G_SHELLCHECK_VERSION="0.6.0"

# Functions

# Compare Version
# Compare the first version (x.x.x format) against second one.
# Returns true if $1 => $2, false otherwise.
# Sources:
#  https://unix.stackexchange.com/questions/285924/how-to-compare-a-programs-version-in-a-shell-script
#  https://stackoverflow.com/questions/4023830/how-to-compare-two-strings-in-dot-separated-version-format-in-bash
# Test table:
# req   | get   | test  | res
# ------+-------+-------+-------
# 2.0.0 | 1.0.0 | 1.0.0 | true
# 1.0.0 | 2.0.0 | 1.0.0 | false
# 0.5.3 | 0.5.3 | 0.5.3 | true
f_compare_version(){
  local required_v="$1"
  local getted_v="$2"
 
  # First: check if equal
  if [ "$required_v" = "$getted_v" ]; then
    return true;
  fi
  
  # Second: check if greater or lesser
  local test_v=$(printf "%s\n%s" "$greater_v" "$lesser_v" | sort -V | head -n 1)
  case $test_v in
    $getted_v) return true ;;
    $required_v) return false ;;
    *) return false ;;
  esac
}

# Test Functions

f_test_nano_version() {
  local version="nano --version | cut -d ' ' -f 4"
  return f_compare_version $G_NANO_VERSION $version
}

f_test_nano_version() {
  local version="nano --version | cut -d ' ' -f 8"
  return f_compare_version $G_SHELLCHECK_VERSION $version
}

# ....shellcheck -f diff *.sh | git apply | git commit -a -m "Shellcheck fast corrections"
shellcheck *.sh