; synergy -- mouse and keyboard sharing utility
; Copyright (C) 2012 Nick Bolton
; 
; This package is free software; you can redistribute it and/or
; modify it under the terms of the GNU General Public License
; found in the file LICENSE that should have accompanied this file.
; 
; This package is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this program.  If not, see <http://www.gnu.org/licenses/>.

!macro !defineifexist _VAR_NAME _FILE_NAME
	!tempfile _TEMPFILE
	!ifdef NSIS_WIN32_MAKENSIS
		; Windows - cmd.exe
		!system 'if exist "${_FILE_NAME}" echo !define ${_VAR_NAME} > "${_TEMPFILE}"'
	!else
		; Posix - sh
		!system 'if [ -e "${_FILE_NAME}" ]; then echo "!define ${_VAR_NAME}" > "${_TEMPFILE}"; fi'
	!endif
	!include '${_TEMPFILE}'
	!delfile '${_TEMPFILE}'
	!undef _TEMPFILE
!macroend
!define !defineifexist "!insertmacro !defineifexist"