fileLauncher

#!/bin/bash

r() {

  # initialisation
  unset filename
  mkdir -p ~/.temp ~/.temp/last
  touch ~/.temp/last/script
  last_script=$(cat ~/.temp/last/script)

  # checking target
  if [[ -n "$1" ]]; then
    if [[ -f "$1" ]]; then
      basename=$(basename -- "$1")
      filename="${1%%.*}"
      ext=".${1##*.}"
      printf "$(pwd)/$1" > ~/.temp/last/script
      pwd='.'
    else
      echo "Target is not accessible"
    fi
  elif [[ -f "$last_script" ]]; then
    basename=$(basename -- "$last_script")
    filename="${basename%%.*}"
    ext=".${basename##*.}"
    pwd=$(pwd)
    cd $(dirname "$last_script")
  else
    if [[ "$last_script" == *"/data/data/com.termux/files/home"* ]]; then
      readablePath=$(sed 's:\/data\/data\/com\.termux\/files\/home:\~:g' <<< "$last_script")
    fi
    echo "Last target is not accessible"
    echo "($readablePath)"
  fi

  # executing target
  if [[ -n "$filename" ]]; then
    if [[ ! "$basename" == *"."* ]]; then
      unset ext
    fi
    if [[ $(head -c 3 "$filename$ext") == "#!/" || "$ext" == ".sh" ]]; then
      chmod +x "$filename$ext" && ./"$filename$ext" "${@:2}"
    elif [[ "$ext" == ".c" ]]; then
      ({ while kill -0 "$$"; do sleep 10; done; rm "$filename.exe"; } > /dev/null 2>&1 &)
      gcc -Wall -Wextra -Werror "$filename$ext" -o "$filename".exe -lm \
      && (sleep 1 && rm "$filename".exe &) \
      && ./"$filename".exe "${@:2}"
    elif [[ "$ext" == ".exe" ]]; then
      exec ./"$filename$ext" "${@:2}"
    elif [[ "$ext" == ".java" ]]; then
      ({ while kill -0 "$$"; do sleep 10; done; rm "$filename.class"; } > /dev/null 2>&1 &)
      proot javac "$filename.java" \
      && (sleep 1 && rm "$filename.class" &) \
      && proot java "$filename" "${@:2}"
    elif [[ "$ext" == ".class" ]]; then
      proot java "$filename" "${@:2}"
    elif [[ "$ext" == ".py" ]]; then
      python3 "$filename$ext" "${@:2}"
    elif [[ "$ext" == ".jar" ]]; then
      java -jar "$filename$ext" "${@:2}"
    else
      echo "File type isn't supported"
    fi
  fi

}

# go back
b() {
  cd "$pwd"
}