unused-injected.sh

#!/usr/bin/env bash

main() {
  local dirPath=$1
  local files=$(find "$dirPath" -name '*.ts' -type f)

  while read filePath; do
    countInjectedsFromFile "$filePath"

  done <<< "$files"
}

countInjectedsFromFile() {
  local filePath=$1
  local injectedNames=$(extractInjectedFromFile "$filePath")

  if [[ $injectedNames != '' ]]; then
    while read name; do
      local num="$(countTerm "$name" "$filePath")"

      if [[ $num = 1 ]]; then
        printf '%s %s\n' "$name" "$filePath"
      fi
    done <<< "$injectedNames"
  fi
}

extractInjectedFromFile() {
  local filePath=$1

  # grep ... # extract constructor signature with parameters from file
  # sed -e ... # remove comments
  # sed -e ... # separating all statements by line break
  # sed -e ... # removing empty line
  # sed -e ... # removing know terms
  # sed -e ... # geting only injected names
  # sed -e ... # removing end line
  grep --null-data --only-matching --extended-regexp 'constructor\s*\([^)]+)' "$filePath" | \
  sed --regexp-extended \
    -e 's/\/\/.*|\/\*.*\*\///' \
    -e 's/,/\n/g' | \
  sed --regexp-extended \
    -e 's/\(|\)|\?|constructor|private|public|protected//g' \
    -e '/^\s*$/d' \
    -e 's/\s*([^:]+):.*/\1/' \
    -e '/^\s+/d'
}

countTerm() {
  local name=$1
  local filePath=$2
  local terms=$(grep --only-matching "$name" "$filePath" | wc --lines)
  printf '%s\n' "$terms"
}

main $1