在 NSIS 中制作安装程序/重新安装程序

Question

我需要这个例程 - 如果提供带有安装路径的 RegKey，我们必须停止执行的应用程序（如果已执行），静默启动卸载程序（如果未找到卸载程序 - 只需删除目录中的所有文件）并将 INSTDIR 设置为值从注册表。 如果带有安装路径的 RegKEY 不存在 - 开始正常安装。

; Try to read Install Path from Reg
ReadRegStr $0 HKCU "Software\TelnetTray" "Path"

; Uninstall first if app installed
${If} $0 != ""
  !define INSTDIR $0

  ; Try to stop app if executed
  Stop "$INSTDIR\app.exe"

  ; Try to uninstall
  ${If} ${FIleExists} "$INSTDIR\uninst.exe"
    ExecWait "$INSTDIR\uninst.exe /S"
  ; Or just delete all files in INSTDIR
  ${Else}
    Delete "$INSTDIR\*"
  ${EndIf}
${EndIf}

Answer 1

你几乎明白了

; Try to read Install Path from Reg
ReadRegStr $0 HKCU "Software\TelnetTray" "Path"

; Uninstall first if app installed
${If} $0 != ""
  StrCpy $INSTDIR $0

  ; Try to stop app if executed
  ${nsProcess::CloseProcess} "$INSTDIR\app.exe" $R0

  ; Try to uninstall
  ${If} ${FIleExists} "$INSTDIR\uninst.exe"
    ExecWait "$INSTDIR\uninst.exe /S"
  ; Or just delete all files in INSTDIR
  ${Else}
    RMDir /r "$INSTDIR"
  ${EndIf}
${EndIf}