#!/bin/sh
# This is a simple (but not yet proven to be portable) script for
# Changing the paths in an installed BUPC runtime.

# Config settings (default is to let them be found in $PATH)
PERL=${PERL:-perl}
FIND=${FIND:-find}
# End of config

usage () {
  echo >&2 "usage: `basename $0` [options] directory"
  echo >&2 "options:"
  echo >&2 "   --old-dir=DIR      legacy option (ignored)"
  echo >&2 "   --new-dir=DIR      legacy option (ignored)"
  echo >&2 "   --transator=TRANS  default is no change"
  exit 1
}

fatal () {
  echo >&2 $@
  exit 1
}

if test $# -lt 1; then
 usage
fi
while test $# -gt 1; do
  case "$1" in
    --old-dir=*) old_dir=`echo "$1" | cut -d= -f2-`;;
    --new-dir=*) new_dir=`echo "$1" | cut -d= -f2-`;;
    --translator=*) translator=`echo "$1" | cut -d= -f2-`;;
    *) usage;;
  esac
  shift
done

target=$1
cd $target || error "Failed to cd to target directory '$target'"
target=`pwd -P`

if test -f "etc/multiconf.conf" -o -f "etc/upcrun.conf"; then
  : # Looks OK
else
  fatal "Directory '$target' does not appear to be a Berkeley UPC install directory"
fi

if test -n "$translator"; then
  echo "translator: $translator"
fi

chmod -R +w .

if test -n "$translator"; then
  $FIND . -name upcc.conf \
     -exec echo Patching translator setting in {}... \; \
     -exec $PERL -pi -e "s@^translator =.*@translator = $translator@" {} \;
fi

chmod -R -w .