#!/bin/sh

tool=$0

usage()
{
  echo ""
  echo "usage: `/bin/basename $tool` -d configdir -p <processor> [-l|-v <version>] [-f] <installdir>"
  echo ""
  echo "    -d <configdir> : the location of config files"
  echo "    -p <processor> : get software for <processor>: n2"
  echo "    -l             : lists all available versions"
  echo "    -v <version>   : get version <version>"
  echo "    -f             : force create of <installdir>"
  echo ""
  echo "  Get <version> of Solaris for <processor> and put it in directory"
  echo "  <installdir>. The directory <installdir> is expected to not exist."
  echo "  Use -f if the <installdir> already exists."
  echo "  Use -l to see the available Solaris versions for processor."
  echo ""
}

len ()
{
  echo $#
}

err ()
{
  echo "Error: $1"
  usage
  exit 2
}

# Where we keep all the images for solaris
# that are and have known to work.

configdir=""
processor=""
get="solaris"
version=""
force=0
list=/bin/false

while getopts d:hp:lv:f OPT; do
  case $OPT in 
    d)
      configdir="$configdir $OPTARG"
      ;;
    p)
      processor="$processor $OPTARG"
      ;;
    l) 
      list=/bin/true
      ;;
    v)
      version="$version $OPTARG"
      ;;
    f)
      force=1
      ;;
    h)
      usage
      exit 0
      ;;
    *)
      usage
      exit 2
      ;;
  esac
done

shift `/bin/expr $OPTIND - 1`

# make sure we have config files' location
if [ "`len $configdir`" != "1" ]; then
  err "I need config files' location."
fi

# Make sure we have a processor

if [ "`len $processor`" != "1" ]; then
  err "I need exactly one -p argument."
fi

processor=`echo $processor`
root=$configdir/$processor

if [ ! -d $root ]; then
  err "I don't have any software for this processor: $processor"
fi

root=$root/$get
installdir=$1

# List versions or check the passed version

if $list ; then
  l=""
  for v in ${root}/* ; do
    l="$l `/bin/basename $v`"
  done
  echo "Use -v with one of: $l"
  exit 0
fi

if [ "`len $version`" != "1" ]; then
  err "I need exactly one version please."
fi

version=`echo $version`

if [ ! -d ${root}/$version ]; then
  err "Version '$version' is not available for $get on $processor"
fi

# Check we have a directory to install the software

if [ "$installdir" = "" ]; then
  err "Missing directory to install $get to at end of the command line."
fi
if [ "$force" = "0" -a -d $installdir ]; then
  err "Directory $installdir already exists, need a new directory name, or use -f."
fi

# Finally

/bin/mkdir -p $installdir
(
  cd $installdir
  # create symbolic links for simulate script
  /bin/ln -s ${root}/${version}/.simulate.sh .
  /bin/ln -s ${root}/${version}/* .
)