pre-commit

#!/bin/bash

# SETUP: ln -s ../../pre-commit .git/hooks/pre-commit

_fail(){ echo "::error::$@"; FAIL=1; }
_fail_exit(){ _fail "$@"; exit 1; }

FILE="source"

test_0_list_has_unique_ip_addrs(){
  REPEATED=`grep -ve '^#' -ve '^$' $FILE | sort | uniq -d`
  if [ -n "$REPEATED" ]; then
    echo "${REPEATED}"
    _fail "IP addresses are duplicated"
  fi
}

# Filter:
# grep -vFf duplicated_list.txt new_list.txt | awk '{print $1}' > final_list.txt

test_1_ip_is_valid(){
  # extract only up to first space, exclude comments (hopefully)
  IP_LIST=`grep -ve '^#' -ve '^$' $FILE | awk '{print $1}'`
  while IFS= read -r ip; do
    # count how many dots are in string
    dots="${ip//[^.]/}"
    if [ "${#dots}" -ne 3 ]; then
      _fail "Invalid IP address: $ip"
      continue
    fi

    IFS='.' read -r -a blocks <<< "$ip"
    for block in "${blocks[@]}"; do
      if ! [[ $block =~ ^[0-9]+(\/[0-9]+)?$ ]]; then
        _fail "Invalid IP address: $ip"
        continue 2  # Skip to the next IP address
      fi

      if ((block < 0 || block > 255)); then
        _fail "Invalid IP address: $ip"
        continue 2  # Skip to the next IP address
      fi
    done
  done <<< $IP_LIST
}

# ---

FAIL=0
function_names=$(declare -F | awk '{print $3}')
for func in $function_names; do
  if [[ $func == test_* ]]; then
    echo "Executing function: $func"
    $func
    echo "--------"
  fi
done

if [ "$FAIL" = "1" ]; then
  exit 1
fi