#!/bin/bash
#
#  PKGGET -- Download the specified URL to the current directory.  We use 
#  a command specific to the system we're on.  We assume the URL has been 
#  properly escaped in the argument list.
#
#  Usage:     pkgget [-h] [-n] [-v] url
#
#  Where	-n	no-op flag
#		-v 	verbose output
#		-h 	this message
#
#  Example:
#	% pkgget -q ftp://iraf.noao.edu/iraf/extern/foo-linux.tar.gz
#
# ----------------------------------------------------------------------------


export 	PATH=../util:$PATH

# Initialize the $iraf and environment.
if [ -z "$iraf" ]; then
  if [ -e "$HOME/.iraf/setup.sh" ]; then
    source $HOME/.iraf/setup.sh
  else
    source ../unix/hlib/setup.sh
  fi
else
    source $iraf/unix/hlib/setup.sh
fi


# Utility aliases.
source ${iraf}/unix/hlib/util.sh



##############################################################################
# START OF MACHDEP DEFINITIONS.
##############################################################################

# MACHDEP definitions which may be reset below.
VERSION=`cat ../.version`


#----------------------------------
# Determine platform architecture.
#----------------------------------

UNAME=""
if [ -e /usr/bin/uname ]; then
    uname_cmd=/usr/bin/uname
    UNAME=`/usr/bin/uname | tr '[A-Z]' '[a-z]'`
elif [ -e /bin/uname ]; then
    uname_cmd=/bin/uname
    UNAME=`/bin/uname | tr '[A-Z]' '[a-z]'`
else
    WARNING  "No 'uname' command found to determine architecture."
    exit 1
fi

case $UNAME in 
    "linux" | "linux64")
	dlcmd="/usr/bin/wget"
	;;
    "darwin" | "macosx" | "macintel" | "ipad")		    # Mac OSX/iOS
        #dlcmd="/usr/bin/ftp -A"
        dlcmd="/usr/bin/ftp"
	;;

    # Other architectures to be added here

    *)      
	ERRMSG  "Unable to determine platform architecture."
	exit 1
	;;
esac

# If we don't have a download command installed, use our own .....
if [ ! -e $dlcmd ]; then
    dlcmd=`dirname $0`/fget
fi

##############################################################################
# END OF MACHDEP DEFINITIONS.
##############################################################################

#=============================================================================
# Declarations and initializations.
#=============================================================================

exec=yes
verb=no
url=""


# Process cmdline flags.
while [ -n "$1" ]; do
    case "$1" in
    "-n")                            # no execute
        exec=no
	;;
    "-v")                            # be chatty
        verb=yes
        quiet=no
	;;
    "-h")                            # print help summary
    	/bin/echo "Usage: pkgget [-h] [-n] [-q | -v] url"
    	/bin/echo ""
    	/bin/echo "    where -n          # no execute"
    	/bin/echo "          -q          # suppress output"
    	/bin/echo "          -v          # verbose output"
    	/bin/echo "          -h          # this message"
	exit 0
	;;

    *)
        url=$1
        break
    esac

    if [ -n "$2" ];  then
        shift
    else
        break
    fi
done


#  Error checks.
if [ -z "$url" ]; then
   if [ "$verb" == "yes" ]; then
      /bin/echo "ERROR: URL not specified"
   fi
   exit 1
fi


#  Do it.
if [ "$exec" == "yes" ]; then
   if [ "$verb" == "yes" ]; then
      /bin/echo "Downloading "$url" ...."
   fi

   if [ "$verb" == "no" ]; then
      $dlcmd ${url} 	>> /dev/null 2>&1
   else
      $dlcmd $url
   fi

   if [ "$verb" == "yes" ]; then
      /bin/echo "done"
   fi
fi


#  Verify we have the file.
if [ ! -e ${url##*/} ]; then
   if [ "$verb" == "yes" ]; then
      /bin/echo "Error downloading file '"${url##*/}"'"
   fi
   exit 1

else
   if (( $#>1 )); then
      mv ${url##*/} $2
   fi
fi

#  Normal exit.
exit 0



#=============================================================================
# Usage
#=============================================================================