Auto-uninstall old before installing new - Revision history

Anders: Empty string protection

2019-09-03T13:45:26Z

Empty string protection

â† Older revision		Revision as of 13:45, 3 September 2019
Line 28:		Line 28:
	StrCpy $2 $1 1 $3		StrCpy $2 $1 1 $3
	IntOp $3 $3 + 1		IntOp $3 $3 + 1
			StrCmp $2 "" +2
	StrCmp $2 ' ' 0 sloop		StrCmp $2 ' ' 0 sloop
	IntOp $3 $3 - 1		IntOp $3 $3 - 1
Line 36:		Line 37:
	IntOp $3 $3 + 1		IntOp $3 $3 + 1
	StrCpy $2 $1 1 $3		StrCpy $2 $1 1 $3
			StrCmp $2 "" +2
	StrCmp $2 '"' 0 qloop		StrCmp $2 '"' 0 qloop
	run:		run:

Anders: Rewrote with support for different $instdir

2019-06-14T18:50:51Z

Rewrote with support for different $instdir

â† Older revision		Revision as of 18:50, 14 June 2019
Line 1:		Line 1:
	{{PageAuthor\|~~codehistorian~~}}		{{PageAuthor\|Anders}}
			[[Category:Code Examples]]
			[[Category:Functions_%26_Macros]]

	This ~~is a~~ code ~~snippet you~~ can ~~put into your .onInit function that will detect whether your software is already installed and, if so, allows the user~~ to uninstall ~~it first~~.		This code can be used to uninstall a existing installation. The previous installation must also be a NSIS based install.

	~~In the source below, we use the~~ define ~~${PROGRAM_NAME}~~ to be the name of the product as well as the name of the installer/uninstaller. You can either define this define or search/replace it. If you name your uninstaller or registry location differently, you should change those strings accordingly.		<highlight-nsis>
			RequestExecutionLevel User
			InstallDir "$LocalAppData\Programs\NSISTest"
			!define UninstId "NSISTest" ; You might want to use a GUID here

	~~<highlight-nsis>~~		!include LogicLib.nsh
	~~Function~~ .~~onInit~~

	~~ReadRegStr $R0 HKLM \~~
	~~"Software\Microsoft\Windows\CurrentVersion\Uninstall\${PROGRAM_NAME}" \~~
	~~"UninstallString"~~
	~~StrCmp $R0 "" done~~

	~~MessageBox MB_OKCANCEL\|MB_ICONEXCLAMATION \~~		!macro UninstallExisting exitcode uninstcommand
	"${~~PROGRAM_NAME~~} ~~is already installed.~~ $\n$~~\nClick `OK` to remove the \~~		Push `${uninstcommand}`
	~~previous version or `Cancel` to cancel this upgrade.~~" \		Call UninstallExisting
	~~IDOK uninst~~		Pop ${exitcode}
	~~Abort~~		!macroend
			Function UninstallExisting
	;~~Run the~~ uninstaller		Exch $1 ; uninstcommand
	~~uninst:~~		Push $2 ; Uninstaller
	~~ClearErrors~~		Push $3 ; Len
	ExecWait '$R0 _?=$~~INSTDIR~~' ;~~Do not copy~~ the uninstaller to ~~a temp file~~		StrCpy $3 ""
			StrCpy $2 $1 1
			StrCmp $2 '"' qloop sloop
			sloop:
			StrCpy $2 $1 1 $3
			IntOp $3 $3 + 1
			StrCmp $2 ' ' 0 sloop
			IntOp $3 $3 - 1
			Goto run
			qloop:
			StrCmp $3 "" 0 +2
			StrCpy $1 $1 "" 1 ; Remove initial quote
			IntOp $3 $3 + 1
			StrCpy $2 $1 1 $3
			StrCmp $2 '"' 0 qloop
			run:
			StrCpy $2 $1 $3 ; Path to uninstaller
			StrCpy $1 161 ; ERROR_BAD_PATHNAME
			GetFullPathName $3 "$2\.." ; $InstDir
			IfFileExists "$2" 0 +4
			ExecWait '"$2" /S _?=$3' $1 ; This assumes the existing uninstaller is a NSIS uninstaller, other uninstallers don't support /S nor _?=
			IntCmp $1 0 "" +2 +2 ; Don't delete the installer if it was aborted
			Delete "$2" ; Delete the uninstaller
			RMDir "$3" ; Try to delete $InstDir
			RMDir "$3\.." ; (Optional) Try to delete the parent of $InstDir
			Pop $3
			Pop $2
			Exch $1 ; exitcode
			FunctionEnd

	~~IfErrors no_remove_uninstaller done~~
	~~;You can either use Delete /REBOOTOK in the uninstaller or add some code~~
	~~;here to remove the uninstaller. Use a registry key to check~~
	~~;whether the user has chosen to uninstall. If you are using an uninstaller~~
	~~;components page, make sure all sections are uninstalled.~~
	~~no_remove_uninstaller:~~

	~~done:~~

			Function .onInit
			ReadRegStr $0 HKCU "Software\Software\Microsoft\Windows\CurrentVersion\Uninstall\${UninstId}" "UninstallString"
			${If} $0 != ""
			${AndIf} ${Cmd} `MessageBox MB_YESNO\|MB_ICONQUESTION "Uninstall previous version?" /SD IDYES IDYES`
			!insertmacro UninstallExisting $0 $0
			${If} $0 <> 0
			MessageBox MB_YESNO\|MB_ICONSTOP "Failed to uninstall, continue anyway?" /SD IDYES IDYES +2
			Abort
			${EndIf}
			${EndIf}
	FunctionEnd		FunctionEnd
	~~</highlight-nsis>~~

	~~The following variant lets the uninstaller remove itself, so the IfErrors block is not needed any more:~~		Page Directory
	~~<highlight-nsis>~~		Page InstFiles
	~~Exec $INSTDIR\uninst.exe ; instead of the ExecWait line~~
	~~</highlight-nsis>~~

	~~NOTE: Both previous methods assume the program was installed in the default directory, which may not be correct~~. ~~Here~~'~~s what I use:~~		Section
			SetOutPath $InstDir
			File "/oname=$InstDir\App.exe" "${__FILE__}" ; Dummy file
			WriteUninstaller "$InstDir\Uninst.exe"
			WriteRegStr HKCU "Software\Software\Microsoft\Windows\CurrentVersion\Uninstall\${UninstId}" "DisplayName" "NSIS Test"
			WriteRegStr HKCU "Software\Software\Microsoft\Windows\CurrentVersion\Uninstall\${UninstId}" "UninstallString" '"$InstDir\Uninst.exe"'
			WriteRegStr HKCU "Software\Software\Microsoft\Windows\CurrentVersion\Uninstall\${UninstId}" "QuietUninstallString" '"$InstDir\Uninst.exe" /S'
			SectionEnd

	~~<highlight-nsis>~~		Section Uninstall
	~~uninst:~~		Delete "$InstDir\App.exe"
	~~ClearErrors~~		DeleteRegKey HKCU "Software\Software\Microsoft\Windows\CurrentVersion\Uninstall\${UninstId}"
	~~Exec~~ $R0		Delete "$InstDir\Uninst.exe"
	~~done:~~		RMDir "$InstDir"
	</highlight-nsis>		SectionEnd
			</highlight-nsis>
	~~[[Category:System Related Functions]]~~

DavidWoods: Suggested code that does not assume previous install was in the default directory

2017-07-07T20:14:23Z

Suggested code that does not assume previous install was in the default directory

â† Older revision		Revision as of 20:14, 7 July 2017
Line 40:		Line 40:
	Exec $INSTDIR\uninst.exe ; instead of the ExecWait line		Exec $INSTDIR\uninst.exe ; instead of the ExecWait line
	</highlight-nsis>		</highlight-nsis>

			NOTE: Both previous methods assume the program was installed in the default directory, which may not be correct. Here's what I use:

			<highlight-nsis>
			uninst:
			ClearErrors
			Exec $R0
			done:
			</highlight-nsis>

	[[Category:System Related Functions]]		[[Category:System Related Functions]]

204.92.8.29: missing done goto label

2009-06-19T15:52:50Z

missing done goto label

â† Older revision		Revision as of 15:52, 19 June 2009
Line 24:		Line 24:
	ExecWait '$R0 _?=$INSTDIR' ;Do not copy the uninstaller to a temp file		ExecWait '$R0 _?=$INSTDIR' ;Do not copy the uninstaller to a temp file

	IfErrors no_remove_uninstaller		IfErrors no_remove_uninstaller done
	;You can either use Delete /REBOOTOK in the uninstaller or add some code		;You can either use Delete /REBOOTOK in the uninstaller or add some code
	;here to remove the uninstaller. Use a registry key to check		;here to remove the uninstaller. Use a registry key to check

83.65.55.26: added a variant

2006-10-12T13:35:15Z

added a variant

â† Older revision		Revision as of 13:35, 12 October 2006
Line 34:		Line 34:

	FunctionEnd		FunctionEnd
			</highlight-nsis>

			The following variant lets the uninstaller remove itself, so the IfErrors block is not needed any more:
			<highlight-nsis>
			Exec $INSTDIR\uninst.exe ; instead of the ExecWait line
	</highlight-nsis>		</highlight-nsis>

	[[Category:System Related Functions]]		[[Category:System Related Functions]]

Deguix: "to removed" was used twice.

2006-07-28T10:11:49Z

"to removed" was used twice.

â† Older revision		Revision as of 10:11, 28 July 2006
Line 26:		Line 26:
	IfErrors no_remove_uninstaller		IfErrors no_remove_uninstaller
	;You can either use Delete /REBOOTOK in the uninstaller or add some code		;You can either use Delete /REBOOTOK in the uninstaller or add some code
	;here ~~to remove~~ to remove the uninstaller. Use a registry key to check		;here to remove the uninstaller. Use a registry key to check
	;whether the user has chosen to uninstall. If you are using an uninstaller		;whether the user has chosen to uninstall. If you are using an uninstaller
	;components page, make sure all sections are uninstalled.		;components page, make sure all sections are uninstalled.

200.186.153.141: rv to last version by Deguix

2006-07-26T20:50:33Z

rv to last version by Deguix

â† Older revision		Revision as of 20:50, 26 July 2006
Line 22:		Line 22:
	uninst:		uninst:
	ClearErrors		ClearErrors
	~~; Copy the uninstaller to a temp location~~		ExecWait '$R0 _?=$INSTDIR' ;Do not copy the uninstaller to a temp file
	~~GetTempFileName $0~~
	~~CopyFiles $R0 $0~~
	~~;Start the uninstaller using the option to not copy itself~~
	ExecWait '$0 _?=$INSTDIR'

	IfErrors no_remove_uninstaller		IfErrors no_remove_uninstaller
	; ~~In most cases~~ the ~~uninstall is successful at this point.~~		;You can either use Delete /REBOOTOK in the uninstaller or add some code
	; ~~You may also consider using~~ a registry key to check ~~whether~~		;here to remove to remove the uninstaller. Use a registry key to check
	; the user has chosen to uninstall. If you are using an uninstaller		;whether the user has chosen to uninstall. If you are using an uninstaller
	; components page, make sure all sections are uninstalled.		;components page, make sure all sections are uninstalled.
	~~goto done~~
	no_remove_uninstaller:		no_remove_uninstaller:
	~~MessageBox MB_ICONEXCLAMATION \~~
	~~"Unable to remove previous version of ${PROGRAM_NAME}"~~
	~~Abort~~

	done:		done:
	~~; remove the copied uninstaller~~
	~~Delete '$0'~~

	FunctionEnd		FunctionEnd

64.132.226.246 at 21:01, 11 December 2005

2005-12-11T21:01:53Z

â† Older revision		Revision as of 21:01, 11 December 2005
Line 22:		Line 22:
	uninst:		uninst:
	ClearErrors		ClearErrors
	ExecWait '$R0 _?=$INSTDIR' ~~;Do not copy the uninstaller to a temp file~~		; Copy the uninstaller to a temp location
			GetTempFileName $0
			CopyFiles $R0 $0
			;Start the uninstaller using the option to not copy itself
			ExecWait '$0 _?=$INSTDIR'

	IfErrors no_remove_uninstaller		IfErrors no_remove_uninstaller
	;~~You can either use Delete /REBOOTOK in~~ the ~~uninstaller or add some code~~		; In most cases the uninstall is successful at this point.
	;~~here to remove to remove the uninstaller. Use~~ a registry key to check		; You may also consider using a registry key to check whether
	;~~whether~~ the user has chosen to uninstall. If you are using an uninstaller		; the user has chosen to uninstall. If you are using an uninstaller
	;components page, make sure all sections are uninstalled.		; components page, make sure all sections are uninstalled.
			goto done
	no_remove_uninstaller:		no_remove_uninstaller:
			MessageBox MB_ICONEXCLAMATION \
			"Unable to remove previous version of ${PROGRAM_NAME}"
			Abort

	done:		done:
			; remove the copied uninstaller
			Delete '$0'

	FunctionEnd		FunctionEnd

Deguix: ->Category:System Related Functions.

2005-11-11T16:19:41Z

->Category:System Related Functions.

â† Older revision		Revision as of 16:19, 11 November 2005
Line 36:		Line 36:
	</highlight-nsis>		</highlight-nsis>

	[[Category:~~Windows Shell Integration~~ Functions]]		[[Category:System Related Functions]]

ConversionBot: Adding new author and category links.

2005-06-24T11:29:35Z

Adding new author and category links.

â† Older revision		Revision as of 11:29, 24 June 2005
Line 1:		Line 1:
	{~~\|align=right~~		{{PageAuthor\|codehistorian}}
	~~\|<small>Author: [[~~{~~{ns:2}}:codehistorian~~\|codehistorian~~]] ([[{{ns:3}}:codehistorian\|talk]], [[{{ns:-1}~~}~~:Contributions/codehistorian\|contrib]])</small>~~
	\|}
	~~<br style="clear:both;">~~
	This is a code snippet you can put into your .onInit function that will detect whether your software is already installed and, if so, allows the user to uninstall it first.		This is a code snippet you can put into your .onInit function that will detect whether your software is already installed and, if so, allows the user to uninstall it first.

Line 38:		Line 36:
	</highlight-nsis>		</highlight-nsis>

	[[~~{{ns:14}}~~:Windows Shell Integration Functions]]		[[Category:Windows Shell Integration Functions]]