#!/bin/sh
# $Id: inisqueak4,v 1.2 2020/12/01 09:44:53 stes Exp $
# 
# inisqueak -- setup a directory for use with Squeak
# 
#   Copyright (C) 1996-2004 by Ian Piumarta and other authors/contributors
#                              listed elsewhere in this file.
#   All rights reserved.
#
#   Copyright (C) 2020 by David Stes
#   All rights reserved.
#   
#   This file is part of Unix Squeak.
# 
#   Permission is hereby granted, free of charge, to any person obtaining a copy
#   of this software and associated documentation files (the "Software"), to deal
#   in the Software without restriction, including without limitation the rights
#   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
#   copies of the Software, and to permit persons to whom the Software is
#   furnished to do so, subject to the following conditions:
# 
#   The above copyright notice and this permission notice shall be included in
#   all copies or substantial portions of the Software.
# 
#   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
#   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
#   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
#   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
#   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
#   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
#   SOFTWARE.
# 
# Author: Ian.Piumarta@INRIA.Fr
# Last edited: 2006-10-18 10:14:20 by piumarta on emilia.local
#
# Author: David Stes
# -r option to use wget and download image from files.squeak.org
# $Id: inisqueak4,v 1.2 2020/12/01 09:44:53 stes Exp $
# 

# subtle difference between SqueakV46.sources not SqueakV4.6.sources
MAJOR=4.6
MAJORV=46
VERSION=4.6-15118

REMOTEDIR="http://files.squeak.org/${MAJOR}/"
REMOTESOURCES=SqueakV${MAJORV}.sources.zip
REMOTEIMAGEZIP=Squeak${VERSION}.zip

prefix=/usr
exec_prefix=${prefix}
bindir=${exec_prefix}/bin
imgdir=${prefix}/lib/squeak

if test ! -w .; then
  echo "You don't have write permission in this directory." >&2
  exit 1
fi

# Sun's /bin/sh does not understand "test -e", but [/usr]/bin/test does
test="`which test`"

list=false
startup=true
batch=false
interactive=true
remote=true

while true; do
  case "$1" in
    -l) list=true; shift;;
    -n) startup=false; shift;;
    -r) remote=true; shift;;
    -R) remote=false; shift;;
    -b) batch=true; interactive=false; shift;;
    -h|-help|--help)
        echo "`basename $0` [-option...] [rootdir]"
        echo '    -b      batch (avoid interaction, exit status reflects success)'
        echo '    -h      you already know about'
        echo '    -r      download Squeak from remote server (default)'
        echo '    -R      do not download Squeak from remote server'
        echo '    -help   same as -h'
        echo '    -l      always present a list of alternative images (overrides -b)'
        echo '    -n      do not run Squeak after installing the files'
        echo '    --help  same as -help'
        exit 0;;
    *)  break;;
  esac
done

if test "$1" != ""; then
  bindir=${1}/${bindir}
  imgdir=${1}/${imgdir}
fi

SQUEAK=${bindir}/squeak
SOURCES=SqueakV${MAJORV}.sources
IMAGE=squeak.image.gz
CHANGES=squeak.changes.gz

# local install function

missing()
{
  echo "The file ${1} is missing." >&2
  echo "Please check your Squeak installation." >&2
  exit 1
}

if ${remote}; then
  echo "Downloading $REMOTESOURCES from $REMOTEDIR"
  wget -O $REMOTESOURCES $REMOTEDIR/$REMOTESOURCES
  case $? in
   0) ;;
   *) echo "Unable to download $REMOTESOURCES from $REMOTEDIR"; exit 1;
  esac
  unzip $REMOTESOURCES
  case $? in
   0) ;;
   *) echo "Unable to unzip $REMOTESOURCES"; exit 1;
  esac
  echo "Downloading $REMOTEIMAGEZIP from $REMOTEDIR"
  wget -O $REMOTEIMAGEZIP $REMOTEDIR/$REMOTEIMAGEZIP
  case $? in
   0) ;;
   *) echo "Unable to download $REMOTEIMAGEZIP from $REMOTEDIR"; exit 1;
  esac
  unzip $REMOTEIMAGEZIP
  case $? in
   0) ;;
   *) echo "Unable to unzip $REMOTEIMAGEZIP"; exit 1;
  esac
  echo "Copying to default image name .."
  cp Squeak${VERSION}.image squeak.image
  cp Squeak${VERSION}.changes squeak.changes
fi

if ${test} \( -f squeak.image \) -a \( -f squeak.changes \) -a \( -e ${SOURCES} \)
then
  if ${startup}; then
    if test ! -x ${SQUEAK}; then
      missing "${SQUEAK}"
    fi
    if ${interactive}; then
      echo "Running ${SQUEAK}";
    fi
    exec ${SQUEAK}
  else
    if ${interactive}; then
      echo "Squeak is already installed in this directory" >&2
    fi
    exit 1
  fi
fi

install()
{
  cpy="${1}"
  src="${2}"
  red="${3}"
  dst="${4}"
  if ${test} ! -e ${dst}; then
    if ${test} -e ${src}; then
      if ${interactive}; then
	echo "+ ${cpy} ${src} ${red} ${dst}";
      fi
      eval      ${cpy} ${src} ${red} ${dst}
    else
      missing "${src}"
    fi
  else
    echo "${dst} is already present -- leaving it alone"
#   startup=false
  fi
}

# choose an image to install

if ${list}; then :; else
  if ${test} \( ! -e ${imgdir}/${IMAGE} \) \
          -o \( ! -e ${imgdir}/${CHANGES} \) ; then
    if ${batch}; then
      echo "Could not find default image to install -- giving up." >&2
      exit 1;
    fi
    list=true
    echo "No default image, looking for alternatives..."
    echo
  fi
fi

if ${list}; then
  images=`ls -1 ${imgdir}/*.image.gz 2>/dev/null | \
          sed "s.${imgdir}/..;s/.image.gz//"`
  if test "$images" = ""; then
    echo "I could not find an image to install." >&2
    echo "Please check your Squeak installation." >&2
    exit 1
  fi
  nimg=`echo ${images} | tr ' ' '\012' | wc -l`
  nimg=`echo ${nimg}`
  more=true
  while ${more}; do
    echo "I found the following images:"
    echo ${images} | tr ' ' '\012' | cat -n
    if echo ${images} | fgrep "Squeak${VERSION}" >/dev/null; then
      echo "(of which I might recommend Squeak${VERSION}, unless you know better)."
    fi
    echo -n "Which one should I install [1-${nimg}]? "
    read reply
    case ${reply} in
      [1-9]) ;;
      [1-9][0-9]) ;;
      *) echo
         echo "Let's try that again, with a NUMBER between 1 and ${nimg}."
         echo
         continue;;
    esac
    if test \( ${reply} -ge 1 \) -a \( ${reply} -le ${nimg} \); then
      more=false
    fi
    if ${more}; then
      echo
      echo "Ha ha, very clever.  Now give me a number between 1 and ${nimg}"
      echo "(or hit your interrupt key [^C or whatever] if you don't like"
      echo "the look of any of them)."
      echo
    fi
  done
  IMAGE=`echo ${images} | tr ' ' '\012' | tail +${reply} | head -1`
  CHANGES=${IMAGE}.changes.gz
  IMAGE=${IMAGE}.image.gz
fi

if ${interactive}; then echo "Installing ${IMAGE} in `pwd`"; fi

install "ln -s"      "${imgdir}/${SOURCES}" " " "${SOURCES}"
install "gunzip -dc" "${imgdir}/${IMAGE}"   ">" "squeak.image"
install "gunzip -dc" "${imgdir}/${CHANGES}" ">" "squeak.changes"

if ${startup}; then
  if test ! -x ${SQUEAK}; then
    missing "${SQUEAK}"
  fi
  if ${interactive}; then
    echo "Running ${SQUEAK}";
  fi
  exec ${SQUEAK}
fi