Shell script to migrate from FontAwesome v4 to v5

fontawesome-4-to-5.sh

#!/bin/bash

# fontawesome-4-to-5.csv
# https://gist.github.com/homuler/e4c1e381cdab254d78b253ec9bc84870
#
# Usage:
#   ./fontawesome-4-to-5.sh COMMAND TARGET_DIR [--csv-path=] [...GREP_OPTIONS]

DIR=$(dirname "$PWD/$0")
COMMAND=$1
TARGET_DIR=$2
CSV_PATH='fontawesome-4-to-5.csv'
GREP_OPTIONS=''

print_info () {
  echo -e "\033[0;32m[INFO] $1\033[0m"
}

print_warning () {
  echo -e "\033[0;33m[Warning] $1\033[0m"
}

print_error () {
  echo -e "\033[0;31m[ERROR] $1\033[0m"
}

show_manual() {
  print_info "./fontawesome-4-to-5.sh COMMAND TARGET_DIR [--csv-path=] [...GREP_OPTIONS]"
}

if [[ -z "${COMMAND}" ]]; then
  print_error "Command is not specified"
  show_manual

  exit 1
fi

while true; do
  case "$3" in
    --csv-path=*)
      CSV_PATH="${3#*=}"
      shift
      ;;
    "")
      shift
      break
      ;;
    *)
      GREP_OPTIONS="${GREP_OPTIONS} $3"
      shift
      ;;
  esac
done

grep_fa() {
  local header
  local row

  while read line; do
    local result
    local count

    if [[ -z "$header" ]]; then
      readarray -d , -t header <<< "$line"
      continue
    fi

    readarray -d , -t row <<< $line

    result=$(grep -E "(fa-${row[0]}$)|(fa-${row[0]}[^-])" --color=always -r ${TARGET_DIR} ${GREP_OPTIONS})

    if [[ ! -z "${result}" ]]; then
      count=$(echo "${result}" | wc -l)
      print_warning "Some files may include old icon names (${row[0]}): COUNT=${count}"
      print_info "Migration Guide: fa fa-${row[0]} -> ${row[2]} fa-${row[1]}"

      printf "${result}\n\n"
    fi

    result=$(grep "${row[3]::-1}" --color=always -r ${TARGET_DIR} ${GREP_OPTIONS})

    if [[ ! -z "${result}" ]]; then
      count=$(echo "${result}" | wc -l)
      print_warning "Some files include a Unicode value that may have changed (${row[3]::-1}): COUNT=${count}"

      printf "${result}\n\n"
    fi
  done < $CSV_PATH
}

sed_fa() {
  local header
  local row

  while read line; do
    local result
    local count

    if [[ -z "$header" ]]; then
      readarray -d , -t header <<< "$line"
      continue
    fi

    readarray -d , -t row <<< $line

    find ${TARGET_DIR} -type f -print0 ${COMMAN_OPTIONS} | xargs -0 sed -i -E "s/(fa fa-${row[0]}$)|(fa fa-${row[0]}([^-]))/${row[2]} fa-${row[1]}\3/g"
  done < $CSV_PATH
}

case "${COMMAND}" in
  grep)
    grep_fa
    exit 0
    ;;
  sed)
    sed_fa
    exit 0
    ;;
  *)
    print_error "${COMMAND}"
    exit 1
    ;;
esac