Uninstalling older versions

phllp_w
6th February 2005 12:42 UTC

Uninstalling older versions
I had NSIS 2.02 and just got NSIS 2.05, I noticed it has an uninstaller which uninstalls older versions.

Can someone please tell me how to do a thing like that?
Thanks

P.S. I found nothing useful in the search. :(

glory_man
7th February 2005 12:17 UTC

P.S. I found nothing useful in the search.

Why not? Search with unistall and older filters.

Try to see makensis.nsi in your NSIS\Examples - dir. There are script and ini-file (for custom page) for these purposes.

phllp_w
7th February 2005 18:53 UTC

There are many examples, but none for what I need.

I need the same thing as in the NSIS installer, so I was hoping a dev could give me the code.

Pidgeot
7th February 2005 22:49 UTC

AFAIK, makensis.nsi IS the NSIS install script. Look for the PageReinstall function, and see how it is used.

phllp_w
7th February 2005 23:49 UTC

I tried it but I get an error and my page doesn't show in the installer. :(


1 warning:

 label "same_version" not used 

>

Here's my code


  Function PageReinstall


  ReadRegStr $R0 HKLM "Software\NAME" ""


 StrCmp $R0 "" 0 +2

    Abortci8


 ;Detect version

    ReadRegDWORD $R0 HKLM "Software\NAME" "VersionMajor"

   IntCmp $R0 ${VER_MAJOR} minor_check new_version older_version

  minor_check:

   ReadRegDWORD $R0 HKLM "Software\NAME" "VersionMinor"

   IntCmp $R0 ${VER_MINOR} new_version older_version


  new_version:


   !insertmacro MUI_INSTALLOPTIONS_WRITE "makensis.ini" "Field 1" "Text" "An older version of NAME is installed on your system. It's recommended that you uninstall the current version before installing. Select the operation you want to perform and click Next to continue."

  !insertmacro MUI_INSTALLOPTIONS_WRITE "makensis.ini" "Field 2" "Text" "Uninstall before installing"

  !insertmacro MUI_INSTALLOPTIONS_WRITE "makensis.ini" "Field 3" "Text" "Do not uninstall"

  !insertmacro MUI_HEADER_TEXT "Already Installed" "Choose how you want to install NAME."

  StrCpy $R0 "1"

   Goto reinst_start


  older_version:


   !insertmacro MUI_INSTALLOPTIONS_WRITE "makensis.ini" "Field 1" "Text" "A newer version of NAME is already installed! It is not recommended that you install an older version. If you really want to install this older version, it's better to uninstall the current version first. Select the operation you want to perform and click Next to continue."

  !insertmacro MUI_INSTALLOPTIONS_WRITE "makensis.ini" "Field 2" "Text" "Uninstall before installing"

  !insertmacro MUI_INSTALLOPTIONS_WRITE "makensis.ini" "Field 3" "Text" "Do not uninstall"

  !insertmacro MUI_HEADER_TEXT "Already Installed" "Choose how you want to install NAME."

  StrCpy $R0 "1"

   Goto reinst_start


  same_version:


   !insertmacro MUI_INSTALLOPTIONS_WRITE "makensis.ini" "Field 1" "Text" "NAME ${VER_DISPLAY} is already installed. Select the operation you want to perform and click Next to continue."

  !insertmacro MUI_INSTALLOPTIONS_WRITE "makensis.ini" "Field 2" "Text" "Reinstall NAME ${VER_DISPLAY}"

  !insertmacro MUI_INSTALLOPTIONS_WRITE "makensis.ini" "Field 3" "Text" "Uninstall NAME ${VER_DISPLAY}"

  !insertmacro MUI_HEADER_TEXT "Already Installed" "Choose the maintenance option to perform."

  StrCpy $R0 "2"


 reinst_start:

  !insertmacro MUI_INSTALLOPTIONS_DISPLAY "makensis.ini"


>FunctionEnd


>Function PageLeaveReinstall


 !insertmacro MUI_INSTALLOPTIONS_READ $R1 "makensis.ini" "Field 2" "State"


 StrCmp $R0 "1" 0 +2

    StrCmp $R1"1" reinst_uninstall reinst_done


  StrCmp $R0"2" 0 +3

    StrCmp $R1"1" reinst_done reinst_uninstall


  reinst_uninstall:

 ReadRegStr $R1 HKLM "Software\NAME" "UninstallString"


 ;Run uninstaller

  HideWindow


    ClearErrors

    ExecWait '$R1 _?=$INSTDIR'


    IfErrors no_remove_uninstaller

    IfFileExists"$INSTDIR\NAME Uninstall.exe" no_remove_uninstaller


      Delete $R1

      RMDir $INSTDIR


    no_remove_uninstaller:


 StrCmp $R0 "2" 0 +2

    Quit


  BringToFront


  reinst_done:


>FunctionEnd 

>

This installer is for a product with v1.3, it needs to check for 1.0 and 1.1. No minor versions or builds are needed.

One more thing, makensis,ini is mentioned alot, what is it all about?

Any help would be appreciated. :)

Pidgeot
8th February 2005 10:51 UTC

The warning occurs because you removed checks for revision number and build number without correcting the previous code. Replace

  minor_check: 
    ReadRegDWORD $R0 HKLM "SoftwareNAME" "VersionMinor" 
    IntCmp $R0 ${VER_MINOR} new_version older_version

with

  minor_check: 
    ReadRegDWORD $R0 HKLM "SoftwareNAME" "VersionMinor" 
    IntCmp $R0 ${VER_MINOR} same_version new_version older_version

or simply define Revision and Build as 0, using the older code.

To make the page display, make sure you actually define the page


!insertmacro MUI_PAGE_WELCOME
!insertmacro MUI_PAGE_LICENSE "..\license.txt"
Page custom PageReinstall PageLeaveReinstall
!insertmacro MUI_PAGE_COMPONENTS
!insertmacro MUI_PAGE_DIRECTORY
!insertmacro MUI_PAGE_INSTFILES

as well as any variables (VersionMajor, etc.) and functions (PageReinstallLeave) used.

phllp_w
8th February 2005 22:23 UTC

Thanks for your help. ;)

. Replaced that code, and added "Page custom PageReinstall PageLeaveReinstall" to my pages list.
. Made the installer make a reg key with VersionMajor, etc, . Defined VersionMajor, Minor, etc.
. Made the PageLeaveReinstall function so I think that's it...

I get NO errors, but it still doesn't show up when installing. :( What else could I have done wrong?
Would it help if I emailed you my entire script so you can see what the prob is?

Thanks again.

Pidgeot
9th February 2005 01:19 UTC

It would be better to post it here on the forums, so I'm not the only one who can help you - to be honest, I'm just working from what I see in makensis.nsi. If you click the "Post a Reply" button, you can attach your .NSI file to your post. If need be, it can also be zipped (to save space).

Of course, if you feel uncomfortable with doing that, go ahead and e-mail me.

phllp_w
9th February 2005 22:34 UTC

I have attached it to this post.
Just so you know I'm using the default makensis.ini as my .ini file, if makes any difference.
Thanks again for the help. ;)

Pidgeot
10th February 2005 07:25 UTC

While you've correctly put the .ini file as ReserveFile, you don't initialize the InstallOptions plugin in .onInit. This is required to show custom pages (refer to the InstallOptions readme).

You need to insert this code in your .onInit:

!insertmacro MUI_INSTALLOPTIONS_EXTRACT "makensis.ini"

Replace makensis.ini with the exact file name and path used in your ReserveFile command. I suggest you keep the script and .ini in the same directory on installation, to minimize errors (deep-linking doesn't seem to work).

phllp_w
10th February 2005 15:04 UTC

I already did all the things you mentioned about the .ini but I forgot about the custom page.

THANKS a million buddy, now everything works fine. :D