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#! /bin/sh
##
## Copyright (C) 2002
##     National Center for Supercomputing Applications
##     All rights reserved.
##

## Update HDF5 compiler tools after the HDF5 software has been installed
## in a new location.
## For help page, use "h5redeploy -h"

# Function definitions

# show help page
usage() {
  # A wonderfully informative "usage" message.
  echo "usage: $prog_name [OPTIONS]"
  echo "  OPTIONS:"
  echo "    -help        This help message."
  echo "    -echo        Show all the shell commands executed"
  echo "    -prefix=DIR  New directory to find HDF5 lib/ and include/"
  echo "                   subdirectories [default: current directory]"
  echo "    -tool=TOOL   Tool to update. TOOL must be in the current"
  echo "                   directory and writable. [default: $h5tools]"
  echo "    -show        Show the commands without executing them"
  echo " "
  exit 1
}

# display variable values
dump_vars(){
    echo "====Showing all variable values====="
    echo prefix=$prefix
    echo h5tools=$h5tools
    echo "====End Showing====="
}

# show actions to be taken
show_action()
{
    echo "Update the following tools because they are now installed at a new directory"
    for t in $h5tools; do
	echo "${t}:"
	echo -n "   current directory="
	sed -e "/^prefix=/s/prefix=//p" -e d $t
	echo    "   new     directory="\""$prefix"\"
    done
}


# Report Error message
ERROR()
{
    echo "***ERROR***"
    echo "$1"
}

# Main
#
# Initialization
h5tools=h5cc
prefix=`(cd ..;pwd)`

# Parse options
for arg in $@ ; do
  case "$arg" in
    -prefix=*)
      prefix="`expr "$arg" : '-prefix=\(.*\)'`"
      ;;
    -echo)
      set -x
      ;;
    -show)
      SHOW="echo"
      ;;
    -tool=*)
      h5tools="`expr "$arg" : '-tool=\(.*\)'`"
      ;;
    -help|help)
      usage
      ;;
    *)
      ERROR "Unknown Option($arg)"
      usage
      exit 1
      ;;
  esac
done

# Sanity checks
if [ ! -d $prefix ]; then
    ERROR "prefix($prefix) is not an existing directory"
    exit 1
fi

for x in $h5tools; do
    if [ ! -w $x ]; then
	ERROR "h5tool($h5tools) is not found in the current directory or is not writable"
	exit 1
    fi
done
	

# Show actions to be taken and get consent
show_action
echo -n "Continue? (yes/no)"
read ansx
ans=`echo $ansx | tr "[A-Z]" "[a-z]"`
if [ x-$ans != x-yes ]; then
    echo ABORT.  No tools changed.
    exit 1
fi


# Create the update commands
CMDFILE=/tmp/h5redeploy.$$
touch $CMDFILE
chmod 0600 $CMDFILE
echo "/^prefix/c"                 >> $CMDFILE
echo prefix=\""$prefix"\"         >> $CMDFILE
echo .                            >> $CMDFILE
(echo w; echo q)                  >> $CMDFILE


# Update them
if [ "$SHOW" = "echo" ]; then
    echo "===Update commands are:===="
    cat $CMDFILE
    echo "===End Update commands====="
fi

for t in $h5tools; do
    echo Update $t ...
    COMMAND="ed - $t"
    if [ "$SHOW" = "echo" ]; then
	echo $COMMAND
    else
	$COMMAND < $CMDFILE
    fi
done


# Cleanup
rm -f $CMDFILE
exit 0

# Some possible future features to add
# CCBASE - Name of the alternative C compiler
# CLINKERBASE - Name of the alternative linker
# LDFLAGS   - Path to different libraries your application will link with
#     (this path should include the path to the zlib library)
# LIBS      - Libraries your application will link with