如何使用NSIS安装或不安装Visual C ++ 2017可再发行组件x86

Question

在安装软件之前，我需要检查是否安装了Visual C++ 2017 redistributable(x86)。如果没有安装，首先安装软件我可以安装可再发行的可执行文件。

当我手动安装它时，它显示在以下路径中：

Computer\HKEY_CLASSES_ROOT\Installer\Dependencies\VC,redist.x86,x86,14.16,bundle\Dependents\{67f67547-9693-4937-aa13-56e296bd40f6}

请帮我看看如何使用NSIS检查上述路径？

因此，如果在安装软件之前不存在可执行文件，我可以使用以下代码安装它：

!insertmacro MUI_LANGUAGE "English"

Section "MyApp"

SetOutPath $INSTDIR
File "\Desktop\Common\vcredist_x86.exe"

ExecShell "" "$INSTDIR\vcredist_x86.exe"
SectionEnd

Answer 1

!include LogicLib.nsh

!macro _RegKeyExistsIn _key _pack _t _f
DetailPrint '${_key} ${_pack}'
!insertmacro _LOGICLIB_TEMP
!ifndef _RegKeyExistsIn_var
    !define _RegKeyExistsIn_var
    Var /Global _RegKeyExistsIn
!endif
StrCpy $_RegKeyExistsIn 0
SetErrors
EnumRegKey $_LOGICLIB_TEMP ${_pack} $_RegKeyExistsIn
    IntOp $_RegKeyExistsIn $_RegKeyExistsIn + 1
    StrCmp $_LOGICLIB_TEMP "" +3
    StrCmp $_LOGICLIB_TEMP "${_key}" "" -3
    ClearErrors
IfErrors `${_f}` `${_t}`
!macroend

Section
${If} "Dependents{67f67547-9693-4937-aa13-56e296bd40f6}" RegKeyExistsIn 'HKCR "Installer\Dependencies\VC,redist.x86,x86,14.16,bundle"'
    DetailPrint "Found the key"
${Else}
    DetailPrint "Key does not exist"
${EndIf}
SectionEnd

但我不知道这是否是检测可再发行组件的最佳方法，因为您正在检查特定的次要版本和一些未知的GUID。

documentation说你应该检查HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ VisualStudio \％vs-version％\ VC \ Runtimes \％x86 | x64 | ARM％：

!include LogicLib.nsh

!ifmacrondef _VerCheck2=>
!macro _VerCheck2_geq_imp l1 l2 r1 r2 _t _f
!insertmacro _LOGICLIB_TEMP
!define _VerCheck2_geq_imp _VerCheck2_geq_${__COUNTER__}
StrCpy $_LOGICLIB_TEMP 0
IntCmpU ${l1} ${r1} ${_VerCheck2_geq_imp}eq "" ${_VerCheck2_geq_imp}end
StrCpy $_LOGICLIB_TEMP 1
Goto ${_VerCheck2_geq_imp}end
${_VerCheck2_geq_imp}eq:
IntCmpU ${l2} ${r2} "" "" ${_VerCheck2_geq_imp}end
StrCpy $_LOGICLIB_TEMP 1
${_VerCheck2_geq_imp}end:
!undef _VerCheck2_geq_imp
!insertmacro _= $_LOGICLIB_TEMP 0 `${_f}` `${_t}`
!macroend
!macro _VerCheck2=> _lhs _rhs _t _f
!insertmacro _VerCheck2_geq_imp ${_lhs} ${_rhs} `${_f}` `${_t}`
!macroend
!endif

Section
ReadRegDWORD $0 HKLM "SOFTWARE\Microsoft\VisualStudio\14.0\VC\Runtimes\x86" "Installed"
ReadRegDWORD $1 HKLM "SOFTWARE\Microsoft\VisualStudio\14.0\VC\Runtimes\x86" "MajorVersion"
ReadRegDWORD $2 HKLM "SOFTWARE\Microsoft\VisualStudio\14.0\VC\Runtimes\x86" "MinorVersion"
${If} $0 <> 0
    DetailPrint "Found version $1.$2"
    ${If} "$1 $2" VerCheck2=> "14 16"
        DetailPrint "The installed version is usable"
    ${Else}
        DetailPrint "Must install redist"
    ${EndIf}
${Else}
    DetailPrint "Must install redist"
${EndIf}
SectionEnd

Answer 2

更简单的版本，使用“Version”字符串键和字符串比较。

Section "CheckVCRedist"
ReadRegStr $0 HKLM "SOFTWARE\Microsoft\VisualStudio\14.0\VC\Runtimes\x86" "Version"
DetailPrint "Found version $0"
; Check for 14.16.27027 [sic]
${If} $0 >= "v14.16.27024.01"
   DetailPrint "The installed version is usable"
${Else}
   DetailPrint "Must install redist"
${EndIf}
SectionEnd

缺点：如果安装了“v14.100.x.y”，理论上这可能会给出假阴性。但影响只会是你尝试安装14.16可再发行组件，它什么都不做。

Answer 3

同样正确的（以及许多开发人员推荐的）方法是简单地安装Runtime。

它不会损害任何组件或软件，而且更快更容易。