help you rebuild nachos and test your HW. Remember to change the variable, _base, to your project directory using 'pwd' command.

nachos-helper.sh

#!/bin/bash

_script="$(readlink -f ${BASH_SOURCE[0]})"
_base="$(dirname $_script)"
log_dir="${_base}/log"

mkdir -p ${log_dir}

BLACK=$(tput   setaf 0)
RED=$(tput     setaf 1)
GREEN=$(tput   setaf 2)
YELLOW=$(tput  setaf 3)
BLUE=$(tput    setaf 4)
MAGENTA=$(tput setaf 5)
CYAN=$(tput    setaf 6)
WHITE=$(tput   setaf 7)
BOLD=$(tput    bold)
RESET=$(tput   sgr0)
UNDERLINE=$(tput     smul)
END_UNDERLINE=$(tput rmul)

info() {
  for msg do
    echo "${BLUE}>>>${WHITE} $msg ${RESET}"
  done
}

success() {
  for msg do
    echo "${GREEN}>>>${WHITE} $msg ${RESET}"
  done
}

maxlen() {
  max=0
  for arg do
    len=${#arg}
    if [[ $len -gt $max  ]]; then
      max=$len
    fi
  done
  echo "$max"
}

bbox() {
  max=$( maxlen $@ )
  n=$(( $max + 8  ))

  for i in `seq 1 $n`; do printf "="; done
  echo

  for arg do
    difference=$(( $max - ${#arg}  ))
    half=$(( $difference / 2  ))
    odd=$(( $difference % 2  ))

    printf "=== "
    for i in `seq 1 $half`; do printf " "; done
    printf "${WHITE}$arg${RESET}"
    for i in `seq 1 $half`; do printf " "; done
    [[ $odd -eq 1  ]] && printf " "
    printf " ==="
    echo
  done

  for i in `seq 1 $n`; do printf "="; done
  echo
}

rebuild () {
  log="${log_dir}/rebuild.log"
  echo "${CYAN}rebuilding nachos...${RESET}"

  cd "${_base}/code/build.linux/"
  make clean &> /dev/null
  make &> ${log}
  vim -R ${log}
  cd - &> /dev/null
}

part2_a () {
  log="${log_dir}/part2_a.log"
  bbox "FS_partII_a"

  cd "${_base}/code/test" &> /dev/null
  cat FS_partII_a.sh > ${log}
  echo "===========================" >> ${log}
  ./FS_partII_a.sh &>> ${log}
  cd - &> /dev/null

  success "Done!"
  vim -R ${log}
}

part2_b () {
  log="${log_dir}/part2_b.log"
  bbox "FS_partII_b"

  cd "${_base}/code/test" &> /dev/null
  cat FS_partII_b.sh > ${log}
  echo "===========================" >> ${log}
  ./FS_partII_b.sh &>> ${log}
  cd - &> /dev/null

  success "Done!"
  vim -R ${log}
}

part3 () {
  log="${log_dir}/part3.log"
  bbox "FS_partIII"

  cd "${_base}/code/test" &> /dev/null
  cat FS_partIII.sh > ${log}
  echo "===========================" >> ${log}
  ./FS_partIII.sh &>> ${log}
  cd - &> /dev/null

  success "Done!"
  vim -R ${log}
}

bonus1 () {
  log="${log_dir}/bonus1.log"
  bbox "bonusI"

  cd "${_base}/code/test" &> /dev/null
  cat FS_bonusI.sh > ${log}
  echo "===========================" >> ${log}
  ./FS_bonusI.sh &>> ${log}
  cd - &> /dev/null

  success "Done!"
  vim -R ${log}
}

bonus2 () {
  log="${log_dir}/bonus2.log"
  bbox "bonusII"

  cd "${_base}/code/test" &> /dev/null
  cat FS_bonusII.sh > ${log}
  echo "===========================" >> ${log}
  ./FS_bonusII.sh &>> ${log}
  cd - &> /dev/null

  success "Done!"
  vim -R ${log}
}

# mp3_test1 () {
#   targets=("mp3_p1" "mp3_p2")
#   _compile_tests ${targets[@]}
#   echo 'compile test done'

#   cd "${_base}/code/test" &> /dev/null
#   echo 'execute nachos'
#   log="${log_dir}/mp3_test1.log"
#   echo "" > ${log}
#   ../build.linux/nachos -ep mp3_p1 100 -ep mp3_p2 99 &>> ${log}
#   less ${log}
#   # ./code/build.linux/nachos -ep ./code/test/mp3_p1 100 -ep ./code/test/mp3_p2 99
#   echo 'Done'

#   cd - &> /dev/null
#   return 0
# }

# mp3_test2 () {
#   targets=("mp3_p2" "mp3_p3")
#   _compile_tests ${targets[@]}
#   echo 'compile test done'

#   cd "${_base}/code/test" &> /dev/null
#   echo 'execute nachos'
#   log="${log_dir}/mp3_test2.log"
#   echo "" > ${log}
#   ../build.linux/nachos -ep mp3_p2 99 -ep mp3_p3 98 &>> ${log}
#   less ${log}
#   echo 'Done'

#   cd - &> /dev/null
#   return 0
# }

# mp3_test3 () {
#   targets=("mp3_p2" "mp3_p3")
#   _compile_tests ${targets[@]}
#   echo 'compile test done'

#   cd "${_base}/code/test" &> /dev/null
#   echo 'execute nachos'
#   log="${log_dir}/mp3_test3.log"
#   echo "" > ${log}
#   ../build.linux/nachos -ep mp3_p2 40 -ep mp3_p3 25 &>> ${log}
#   less ${log}
#   echo 'Done'

#   cd - &> /dev/null
#   return 0
# }

# consoleIO_test1 () {
#   target="consoleIO_test1"
#   cd "${_base}/code/test/"
#   {
#     make clean
#   } &> /dev/null
#   make ${target} &> /dev/null
#   log="${log_dir}/${target}.log"
#   echo "<<<<<<< Result" > ${log}
#   echo "" >> ${log}
#   ../build.linux/nachos -e ${target} &>> ${log}
#   echo "" >> ${log}
#   echo "=======" >> ${log}
#   echo "" >> ${log}
#   cat "${target}.c" >> ${log}
#   echo "" >> ${log}
#   echo ">>>>>>> Code" >> ${log}
#   less ${log}
#   cd - &> /dev/null
# }

# consoleIO_test2 () {
#   target="consoleIO_test2"
#   cd "${_base}/code/test/"
#   {
#     make clean
#   } &> /dev/null
#   make ${target} &> /dev/null
#   log="${log_dir}/${target}.log"
#   echo "<<<<<<< Result" > ${log}
#   echo "" >> ${log}
#   ../build.linux/nachos -e ${target} &>> ${log}
#   echo "" >> ${log}
#   echo "=======" >> ${log}
#   echo "" >> ${log}
#   cat "${target}.c" >> ${log}
#   echo "" >> ${log}
#   echo ">>>>>>> Code" >> ${log}
#   less ${log}
#   cd - &> /dev/null
# }

# fileIO_test1 () {
#   target="fileIO_test1"
#   cd "${_base}/code/test/"
#   {
#     make clean
#   } &> /dev/null
#   make ${target} &> /dev/null
#   log="${log_dir}/${target}.log"
#   echo "<<<<<<< Result" > ${log}
#   echo "" >> ${log}
#   ../build.linux/nachos -e ${target} &>> ${log}
#   echo "" >> ${log}
#   echo "=======" >> ${log}
#   echo "" >> ${log}
#   cat "${target}.c" >> ${log}
#   echo "" >> ${log}
#   echo ">>>>>>> Code" >> ${log}
#   less ${log}
#   cd - &> /dev/null
# }

# fileIO_test2 () {
#   target="fileIO_test2"
#   cd "${_base}/code/test/"
#   {
#     make clean
#   } &> /dev/null
#   make ${target} &> /dev/null
#   log="${log_dir}/${target}.log"
#   echo "<<<<<<< Result" > ${log}
#   echo "" >> ${log}
#   ../build.linux/nachos -e ${target} &>> ${log}
#   echo "" >> ${log}
#   echo "=======" >> ${log}
#   echo "" >> ${log}
#   cat "${target}.c" >> ${log}
#   echo "" >> ${log}
#   echo ">>>>>>> Code" >> ${log}
#   less ${log}
#   cd - &> /dev/null
# }

# test_mp2 () {
#   targets=("consoleIO_test1" "consoleIO_test2")
#   cd "${_base}/code/test/"
#   {
#     make clean
#   } &> /dev/null
#   for target in "${targets[@]}"; do
#     make ${target} &> /dev/null
#   done
#   cd - &> /dev/null
#   # log="${log_dir}/mp2.log"
#   ./code/build.linux/nachos -e ./code/test/consoleIO_test1 -e ./code/test/consoleIO_test2
#   # less ${log}
#   return 0
# }

# test_mp1 () {
#   targets=("consoleIO_test1" "consoleIO_test2" "fileIO_test1" "fileIO_test2")
#   ask "    >> ${WHITE}Rebuild nachos?(${GREEN}y${WHITE}/${RED}n${WHITE})${RESET}"
#   if [[ $? == 0 ]]
#   then
#     rebuild
#     ! ask "    >> ${WHITE}build nachos success?(${GREEN}y${WHITE}/${RED}n${WHITE})${RESET}" && return 0
#   fi

#   cd "${_base}/code/test/"
#   {
#     make clean
#   } &> /dev/null
#   for target in "${targets[@]}"; do
#     ask "    >> ${WHITE}Start next test(${BLUE}${UNDERLINE}${target}${END_UNDERLINE}${WHITE})?(${GREEN}y${WHITE}/${RED}n${WHITE})${RESET}"
#     if [[ $? == 0 ]]
#     then
#       make ${target} &> /dev/null
#       log="${log_dir}/${target}.log"
#       echo "<<<<<<< Result" > ${log}
#       echo "" >> ${log}
#       ../build.linux/nachos -e ${target} &>> ${log}
#       echo "" >> ${log}
#       echo "=======" >> ${log}
#       echo "" >> ${log}
#       cat "${target}.c" >> ${log}
#       echo "" >> ${log}
#       echo ">>>>>>> Code" >> ${log}
#       less ${log}
#     fi
#   done
#   cd - &> /dev/null
#   return 0

# }

_compile_tests () {
  echo 'compile tests:'
  cd "$_base/code/test/"
  make clean &> /dev/null
  for target in "${@}"; do
    echo -e "\t$target"
    make $target &> /dev/null
  done
  cd - &> /dev/null
}

# arg1: msg
ask () {
  read -p "$1" -n 1 -r
  echo
  if [[ ! $REPLY =~ ^[Yy]$ ]]
  then
    [[ "$0" = "$BASH_RESOURCE" ]] && exit 1 || return 1
  fi
}

echo "    >>> ${BLUE}Now you can call ${YELLOW}${BOLD}rebuild${RESET}${BLUE} to update your modification.${RESET} <<<"

reference:

• How do I prompt a user for confirmation in bash script? - Stack Overflow
• shell - How to hide command output in bash - Stack Overflow
• Exit and Exit Status