NSIS獲取參數

Question

得到-n 0值作為字符串（不需要選項）傳遞給安裝程序，我不太明白這個函數有什么用？

; GetParameters
 ; input, none
 ; output, top of stack (replaces, with e.g. whatever)
 ; modifies no other variables.

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

Answer 1

GetParameters只獲取參數（“yourapp.exe / foo / bar”會給你“/ foo / bar”等）它基本上只是去除第一個標記（帶引號處理）使用GetOptions來獲取參數的值。

!include "FileFunc.nsh"
!include "LogicLib.nsh"

function .onInit
${GetParameters} $0
ClearErrors
${GetOptions} $0 "-n" $1
${IfNot} ${Errors}
    MessageBox mb_ok $1
${EndIf}
functionend