; See http://nsis.sourceforge.net/Check_if_a_file_exists_at_compile_time for documentation

!macro !ifexist _FILE_NAME

!tempfile _TEMPFILE

!system `if exist "${_FILE_NAME}" echo !define _FILE_EXISTS > "${_TEMPFILE}"`

!include `${_TEMPFILE}`

!delfile `${_TEMPFILE}`

!undef _TEMPFILE

!ifdef _FILE_EXISTS

!undef _FILE_EXISTS

!macroend

!define !ifexist "!insertmacro !ifexist"

!macro !ifnexist _FILE_NAME

!tempfile _TEMPFILE

!system `if not exist "${_FILE_NAME}" echo !define _FILE_EXISTS > "${_TEMPFILE}"`

!include `${_TEMPFILE}`

!delfile `${_TEMPFILE}`

!undef _TEMPFILE

!ifdef _FILE_EXISTS

!undef _FILE_EXISTS

!macroend

!define !ifnexist "!insertmacro !ifnexist"