windows 检测程序是否已与 NSIS 一起安装
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Detecting if a program is already installed with NSIS
提问by Abdullah Jibaly
I'm using NSIS to create an installer for a program, what is the best way to detect if this program is already installed? Also, since I'm running the installer from the autorun.inf, can I immediately quit the installer if it locates an installed copy? Is there a better way to do this?
我正在使用 NSIS 为程序创建安装程序，检测该程序是否已安装的最佳方法是什么？另外，由于我从 autorun.inf 运行安装程序，如果它找到已安装的副本，我可以立即退出安装程序吗？有一个更好的方法吗？
回答by Magnus Johansson
How about this. I had this in an old NSIS script laying around.
这个怎么样。我在一个旧的 NSIS 脚本中放置了这个。
; Check to see if already installed
ReadRegStr $R0 HKLM "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\<YOUR-APP-NAME>" "UninstallString"
IfFileExists $R0 +1 NotInstalled
messagebox::show MB_DEFBUTTON4|MB_TOPMOST "<YOUR-APP-NAME>" \
"0,103" \
"<YOUR-APP-NAME> is already installed." \
"Launch Uninstall" "Cancel"
Pop $R1
StrCmp $R1 2 Quit +1
Exec $R0
Quit:
Quit
NotInstalled:
回答by David Hanak
I've been using a slightly more sophisticated test which also checks the version of the installed software:
我一直在使用稍微复杂的测试，它还会检查已安装软件的版本：
!define PRODUCT_VERSION "1.2.0"
!include "WordFunc.nsh"
!insertmacro VersionCompare
Var UNINSTALL_OLD_VERSION
...
Section "Core System" CoreSystem
StrCmp $UNINSTALL_OLD_VERSION "" core.files
ExecWait '$UNINSTALL_OLD_VERSION'
core.files:
...
WriteRegStr HKLM "Software${PRODUCT_REG_KEY}" "" $INSTDIR
WriteRegStr HKLM "Software${PRODUCT_REG_KEY}" "Version" "${PRODUCT_VERSION}"
...
SectionEnd
...
Function .onInit
;Check earlier installation
ClearErrors
ReadRegStr !define PRODUCT_UNINST_ROOT_KEY "HKLM"
!define PRODUCT_UNINST_KEY "Software\Microsoft\Windows\CurrentVersion\Uninstall${COMPANY_NAME} ${PRODUCT_NAME}"
Section -Post
SetShellVarContext current
WriteUninstaller "${UNINST_PATH}\uninst.exe"
WriteRegStr ${PRODUCT_UNINST_ROOT_KEY} "${PRODUCT_UNINST_KEY}" "DisplayName" "$(^Name)"
HKLM "Software${PRODUCT_REG_KEY}" "Version"
IfErrors init.uninst ; older versions might not have "Version" string set
${VersionCompare} Function IsProductInstalled
ClearErrors
ReadRegStr ${PRODUCT_UNINST_ROOT_KEY} "${PRODUCT_UNINST_KEY}" "DisplayName"
StrCmp "" exit
${PRODUCT_VERSION}
IntCmp 2 init.uninst
MessageBox MB_YESNO|MB_ICONQUESTION "${PRODUCT_NAME} version Section Uninstall
DeleteRegKey ${PRODUCT_UNINST_ROOT_KEY} "${PRODUCT_UNINST_KEY}"
seems to be already installed on your system.$\nWould you like to proceed with the installation of version ${PRODUCT_VERSION}?" \
IDYES init.uninst
Quit
init.uninst:
ClearErrors
ReadRegStr ##代码## HKLM "Software${PRODUCT_REG_KEY}" ""
IfErrors init.done
StrCpy $UNINSTALL_OLD_VERSION '"##代码##\uninstall.exe" /S _?=##代码##'
init.done:
FunctionEnd
You of course have to fill in the details, this only gives you a rough skeleton.
你当然必须填写细节，这只会给你一个粗略的骨架。
回答by Cherian
After creating your uninstaller create a product name entry in registry
创建卸载程序后，在注册表中创建一个产品名称条目
##代码##To see if the product is installed do
要查看产品是否已安装，请执行
##代码##In your uninstall you should be doing
在你的卸载你应该做
##代码##回答by Kevin
This is generally done by having NSIS insert a registry key for your product when it installs. It is then an easy manner to detect if that registry key is present and if so, bail
这通常是通过让 NSIS 在安装时为您的产品插入注册表项来完成的。这是一种检测该注册表项是否存在的简单方法，如果存在，则保释
