在同一安装程序中使用更新的NSIS路径

Question

我在更新PATH变量时遇到问题.我需要做的是更新路径(工作正常),然后立即在安装程序中使用新版本.这不起作用.

这是我用来更新路径的内容:

!macro ADD_TO_PATH pathAdd
       DetailPrint "Adding ${pathAdd} to the system PATH."
       ReadRegStr $1 ${WriteEnvStr_RegKey} "PATH"
       WriteRegStr ${WriteEnvStr_RegKey} "PATH" "$1;${pathAdd}"
       SendMessage ${HWND_BROADCAST} ${WM_WININICHANGE} 0 "STR:Environment" /TIMEOUT=5000

       ReadRegStr $1 ${WriteEnvStr_RegKey} "PATH"
       MessageBox MB_OK "Path: $1"

!macroend

以下是我需要做的事情:

Section "${PRODUCT_NAME}" SEC_R

        DetailPrint 'Installing Python Dateutil...'
        !insertmacro EXEC_OUT 'dtutil' 'easy_install python-dateutil' 'DateUtil' 'true'

SectionEnd

EXEC_OUT的位置如下:

; Silent execution of easy_install.
; abrt    - is set to 'true', causes Abort on failure.
; name    - user-friendly name to print
; package - unique name for labels
; what    - full command to execute(ex: "easy_install packageXYZ")
!macro EXEC_OUT package what name abrt

       MessageBox MB_OK "what: ${what}"
       ExecWait "${what}" $0
       ${If} $0 == "0"
             DetailPrint "${name} module installed successfully."
       ${Else}
              DetailPrint "${name} failed to install: $0"
             ${If} ${abrt} == "true"
                  abort "An essential part of the installation, ${name}, failed to install. Aborting installation."
             ${EndIf}
       ${EndIf}

!macroend

为什么这不起作用？在应用程序退出之前是否无法更新PATH？

Answer 1

您还需要为正在运行的进程设置环境变量.

http://nsis.sourceforge.net/Setting_Environment_Variables_to_Active_Installer_Process