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#! /bin/sh
##
## Copyright by the Board of Trustees of the University of Illinois.
## All rights reserved.
##
## This file is part of HDF5.  The full HDF5 copyright notice, including
## terms governing use, modification, and redistribution, is contained in
## the files COPYING and Copyright.html.  COPYING can be found at the root
## of the source code distribution tree; Copyright.html can be found at the
## root level of an installed copy of the electronic HDF5 document set and
## is linked from the top-level documents page.  It can also be found at
## http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html.  If you do not have
## access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu.
##

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

# Function definitions

# show help page
usage() {
  # A wonderfully informative "usage" message.
  echo "usage: $prog_name [OPTIONS]"
  echo "  OPTIONS:"
  echo "    -help|help   This help message"
  echo "    -echo        Show all the shell commands executed"
  echo "    -force       No prompt, just do it"
  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 $foundtools; do
	echo "${t}:"
	echo "   current setting=`sed -e '/^prefix=/s/prefix=//p' -e d $t`"
	echo "   new     setting="\""$prefix"\"
    done
}


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

# Main
#
# Initialization
h5tools="h5cc h5fc h5c++"	# possible hdf5 tools
foundtools=		# tools found and will be modified
fmode=			# force mode, default is off
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
      ;;
    -force)
      fmode=yes
      ;;
    *)
      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 [ -f $x ]; then
	foundtools="$foundtools $x"
	if [ ! -w $x ]; then
	    ERROR "h5tool($x) is not writable"
	    exit 1
	fi
    fi
done

if [ -z $foundtools ]; then
    ERROR "found no tools to modify"
    exit 1
fi

# Show actions to be taken and get consent
show_action
# Ask confirmation unless fmode is on
if [ x-$fmode = x- ]; then
    echo "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
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 $foundtools; 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