For a more immersive Zork experience...

zork.sh

#!/bin/bash

# INSTRUCTIONS
# (0) Save this file as zork.sh
# (1) Change SRCDIR, ZILF, and DOTNET for your system
# (2) Add to path with "source ./zork.sh"
# (3) Now you can have the true Zork experience while installing it! Try it!
#
# get zilf
# build zilf
# get zork
# build zork
# play zork
#
# Only works in Ubuntu Linux, because trying is hard

export SRCDIR='/data2/Code/src'
export ZILF='zilf-0.9.0-linux-x64'
export DOTNET='/usr/bin/dotnet'

export ZORK='zork1'
export ZORKDIR=${SRCDIR}/${ZORK}

get() {
  if [[ $@ == "zilf" ]]; then
    if [[ -d ${SRCDIR}/${ZILF} ]]; then
      echo "Nothing to do; zilf installed."
    else
      cd ${SRCDIR}
      wget https://bitbucket.org/jmcgrew/zilf/downloads/${ZILF}.tar.gz
      tar -zxvf ./${ZILF}.tar.gz
      export ZILFHOME=${SRCDIR}/${ZILF}/bin
      PATH=$PATH:${ZILFHOME}
    fi
  elif [[ $@ == "zork" ]]; then
    if [[ -d ${ZORKDIR} ]]; then
      echo "Nothing to do; zork installed."
    else
      cd ${SRCDIR}
      git clone https://github.com/historicalsource/${ZORK}
    fi
  else
    command get "$@"
  fi
}

build() {
  if [[ $@ == "zork" ]]; then
    export ZILFSRC=${SRCDIR}/zilf/bin/Release/netcoreapp2.2/linux-x64/publish/
    if [[ -d ${ZILFSRC} ]]; then
      export ZILFHOME=${ZILFSRC}
    else
      export ZILFHOME=${SRCDIR}/${ZILF}/bin
    fi
    PATH=$PATH:${ZILFHOME}
    cd ${ZORKDIR}
    zilf zork1.zil
    zapf zork1.zap
  elif [[ $@ == "zilf" ]]; then
    cd ${SRCDIR}

    # dotnet-sdk-2.2
    if [[ ! -f ${DOTNET} ]]; then
      echo "Installing dotnet-sdk-2.2..."

      # I'm not sure this is a good idea; works in Ubuntu 18.04
      if [[ ! -e packages-microsoft-prod.deb ]]; then
        export VUBUNTU=`lsb_release -r | cut -d ':' -f 2 | sed -e 's/^[[:space:]]*//'`
        wget -q https://packages.microsoft.com/config/ubuntu/${VUBUNTU}/packages-microsoft-prod.deb
      fi

      sudo dpkg -i packages-microsoft-prod.deb
      sudo apt install --assume-yes apt-transport-https
      sudo apt update
      sudo apt install --assume-yes dotnet-sdk-2.2
    fi

    if [[ ! -d ${SRCDIR}/zilf ]]; then
      # mercurial
      if [[ ! -x "$(command -v hg)" ]]; then
        sudo apt install --assume-yes mercurial
      fi

      # zilf
      hg clone https://bitbucket.org/jmcgrew/zilf/
    fi
    cd zilf

    # build
    for i in Zilf Zapf; do dotnet publish src/$i --self-contained -c Release -r linux-x64; done
  else
    command build "$@"
  fi
}

play() {
  if [[ $@ == "zork" ]]; then
    if [[ ! -x "$(command -v frotz)" ]]; then
      sudo apt install --assume-yes frotz
    fi
    cd ${ZORKDIR}
    if [[ -e zork1.z3 ]]; then
      frotz zork1.z3
    else
      cd COMPILED
      frotz zork1.z3
    fi
  else
    command play "$@"
  fi
}