Assuming you don't mind having an external CAB file, it's not too
hard... here's a (simplified) script that I'm using to permit
end-users to customize a configuration file prior to deployment. The
example code modifies the MSI (which is fine for testing), however our
production code creates a copy, modifies it, generates an MST against
the original and finally removes the copy.
This code doesn't actually "replace" the original file, but adds a
second copy which gets installed instead.
Const MSI_SOURCE = "application.msi"
Const FILE_REPLACE = "config.xml"
Dim filesys, installer, database, view
Dim objFile, size, result, objCab
Set filesys=CreateObject("Scripting.FileSystemObject")
Set installer = CreateObject("WindowsInstaller.Installer")
Set database = installer.OpenDatabase (MSI_SOURCE, 1)
Set objFile = filesys.GetFile(FILE_REPLACE)
size = objFile.Size
objCab.CreateCab "config.cab", False, False, False
objCab.AddFile FILE_REPLACE, filesys.GetFileName(FILE_REPLACE)
objCab.CloseCab
Set view = database.OpenView ("SELECT LastSequence FROM Media WHERE DiskId = 1")
view.Execute
Set result = view.Fetch
seq = result.StringData(1) + 1 ' Sequence for new configuration file
Set view = database.OpenView ("INSERT INTO Media (DiskId,
LastSequence, Cabinet) VALUES ('2', '" & seq & "', 'config.cab')")
view.Execute
Set view = database.OpenView ("UPDATE File SET FileSize = " & size &
", Sequence = " & seq & " WHERE File = '" & LCase(FILE_REPLACE) & "'")
view.Execute
On Wed, Nov 11, 2009 at 4:12 AM, Kim Gybels <kim.gyb...@metris.com> wrote:
> This is possible using msidb which is part of the Windows Installer
> Development Tools.
>
> I think you will need to do the following:
> - extract cab file using "msidb -x"
> - replace the file in the cabinet
> - delete the cab file from the msi using "msidb -k"
> - add the changed cabinet back using "msidb -a"
>
> If you do not know the name of the stream you can
> use a tool like InstEdit to find out.
>
> If there is a shorter method please let me know.
>
> Best regards,
> Kim
>
> John Daintree wrote:
>> Hello all,
>>
>>
>>
>> Is it possible to replace a file in an existing MSI package without having
>> to go through the build process to rebuild the whole thing? If so, how?
>>
>>
>>
>> Thanks,
>>
>> John
>>
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>
> --
>
> * *
>
>
> *Kim Gybels
> Software Developer
> * kim.gyb...@nikonmetrology.com <mailto:kim.gyb...@nikonmetrology.com>
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> information contained in this communication nor for any delay in its receipt
> or damage to your system. Incoming and outgoing email communications may be
> monitored by Metris, as permitted by applicable law and regulations.
>
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