updater.nsi

!define py2exeOutputDir 'updater'
!define exe             'portable_updater.exe'
!define icon            'E:\Python\python.ico'
!define compressor      '/SOLID lzma'  ;one of 'zlib', 'bzip2', 'lzma'
!define onlyOneInstance

; - - - - do not edit below this line, normaly - - - -
!ifdef compressor
    SetCompressor ${compressor}
!else
    SetCompress Off
!endif
Name ${exe}
OutFile ${exe}
SilentInstall silent
!ifdef icon
    Icon ${icon}
!endif

Function GetParameters
  Push $R0
  Push $R1
  Push $R2
  Push $R3
 
  StrCpy $R2 1
  StrLen $R3 $CMDLINE
 
  ;Check for quote or space
  StrCpy $R0 $CMDLINE $R2
  StrCmp $R0 '"' 0 +3
    StrCpy $R1 '"'
    Goto loop
  StrCpy $R1 " "
 
  loop:
    IntOp $R2 $R2 + 1
    StrCpy $R0 $CMDLINE 1 $R2
    StrCmp $R0 $R1 get
    StrCmp $R2 $R3 get
    Goto loop
 
  get:
    IntOp $R2 $R2 + 1
    StrCpy $R0 $CMDLINE 1 $R2
    StrCmp $R0 " " get
    StrCpy $R0 $CMDLINE "" $R2
 
  Pop $R3
  Pop $R2
  Pop $R1
  Exch $R0
FunctionEnd

; - - - - Allow only one installer instance - - - - 
!ifdef onlyOneInstance
Function .onInit
 System::Call "kernel32::CreateMutexA(i 0, i 0, t '$(^Name)') i .r0 ?e"
 Pop $0
 StrCmp $0 0 launch
  Abort
 launch:
FunctionEnd
!endif
; - - - - Allow only one installer instance - - - - 

Var Current

Section
    ; Get directory from which the exe was called
    System::Call "kernel32::GetCurrentDirectory(i ${NSIS_MAX_STRLEN}, t .r0)"
    StrCpy $Current $0

    ; Unzip into pluginsdir
    InitPluginsDir
    SetOutPath '$PLUGINSDIR'
    File /r '${py2exeOutputDir}\*.*'
    
    ; Set working dir and execute, passing through commandline params
    SetOutPath '$Current'
    Call GetParameters
    ExecWait '"$PLUGINSDIR\${exe}" $R0' $R2
    SetErrorLevel $R2
SectionEnd