Lista imports não utilizados em arquivos .ts

unused-imports.sh

#!/usr/bin/env bash

function delimiterStart() {
    echo '********************************************************************************'
}

function delimiterEnd() {
    echo '================================================================================'
}

function delimiterThin() {
    echo '--------------------------------------------------------------------------------'
}

function title() {
    local title=$1
    echo $title
    delimiterThin
}


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

getImportsFromFile() {
  local filePath=$1

  grep --no-filename --extended-regexp '^import\s+\{[^}]+\}\s+from[^;]+;*' $filePath
}

extractModuleFromImport() {
  while read importLine; do
    sed --regexp-extended 's/import.*from\s+(.*)/\1/' <<< $importLine
  done
}

extractNamedImports() {
  while read importLine; do
    sed --regexp-extended -e 's/import\s+\{([^}]+)\}.*/\1/' -e 's/\s*,\s*/\n/g' <<< $importLine
  done
}

splitImports() {
  while read importLine; do
    local module=$(extractModuleFromImport <<< $importLine)

    while read name; do
      printf 'import { %s } from %s\n' $name $module
    done <<< "$(extractNamedImports <<< $importLine)"
  done
}

getDistinctImportFromFile() {
  local filePath=$1

  getImportsFromFile $filePath | splitImports | sort | uniq
}

getDuplicateImportsFromFile() {
  local filePath=$1

  getImportsFromFile $filePath | \
  splitImports | \
  sort | \
  uniq -cd | \
  sed --regexp-extended 's/\s+([0-9]+).*\{([^}]+)\}.*/\1\2/' | \
  xargs -i% echo "% $filePath"
}

listUnusedImports() {
  local directory=$1

  while read filePath; do
    local duplicates=$(getDuplicateImportsFromFile $filePath)

    while read importLine; do
      if [ -n "$importLine" ]; then
        while read name; do
          local termsNum=$(countTerm $name $filePath)
          local duplicatesNum=$(grep --extended-regexp "$name" <<< $duplicates | sed --regexp-extended 's/^([0-9]+).*/\1/')

          if [ -n "$duplicatesNum" ]; then
            termsNum=$(($termsNum-$duplicatesNum-1))
          fi

          if [ $termsNum -lt 2 ]; then
            # printf '%d %s %s\n' $termsNum $name $filePath
            printf '%s %s\n' $name $filePath
          fi
        done <<< "$(extractNamedImports <<< $importLine)"
      fi
    done <<< "$(getDistinctImportFromFile $filePath)"
  done <<< "$(find $directory -name '*.ts' -type f)"
}

main() {
  delimiterStart
  title 'Imports não utilizados'
  listUnusedImports $src
  delimiterEnd
}

main $1