#! /bin/sh

# Copyright (c) 1994-2015 by Marc Feeley, All Rights Reserved.

PROGRAMS="@PROGRAMS@"
LIBRARIES="@LIBRARIES@"
INCLUDES="@INCLUDES@"

BIN_DIR="@BIN_DIR@"
LIB_DIR="@LIB_DIR@"
INCLUDE_DIR="@INCLUDE_DIR@"

INSTALL_DIR="@INSTALL_DIR@"
GAMBIT_BIN_DIR="$INSTALL_DIR/current/bin"
GAMBIT_LIB_DIR="$INSTALL_DIR/current/lib"
GAMBIT_INCLUDE_DIR="$INSTALL_DIR/current/include"

install_safely() # dir, gambit_dir, files
{
  DIR="$1"
  GAMBIT_DIR="$2"
  FILES="$3"

  EXISTING_CORRECT=""
  EXISTING_INCORRECT=""
  MISSING=""

  if [ ! -e "$DIR" ] ; then
    mkdir -p -m 0755 "$DIR"
  fi

  for f in $FILES ; do

    if [ -e "$DIR/$f" ] ; then
      if [ -L "$DIR/$f" -a "`readlink \"$DIR/$f\"`" == "$GAMBIT_DIR/$f" ] ; then
        EXISTING_CORRECT="$EXISTING_CORRECT $f"
      else
        EXISTING_INCORRECT="$EXISTING_INCORRECT $f"
      fi
    else
      MISSING="$MISSING $f"
    fi

  done

  for f in $EXISTING_INCORRECT ; do

    # This should not happen because the InstallationCheck script aborts
    # the installation when an existing file would be clobbered.
    # However for safety we save the file under a different name.

    mv "$DIR/$f" "$DIR/$f-orig"

  done

  for f in $EXISTING_INCORRECT $MISSING ; do
    ln -s "$GAMBIT_DIR/$f" "$DIR/$f"
  done
}

install_safely "$BIN_DIR" "$GAMBIT_BIN_DIR" "$PROGRAMS"
install_safely "$LIB_DIR" "$GAMBIT_LIB_DIR" "$LIBRARIES"
install_safely "$INCLUDE_DIR" "$GAMBIT_INCLUDE_DIR" "$INCLUDES"