Null/empty component guid components are only installed in major upgrades.
Patches are not typical major upgrades and those components are ignored (just
as with all other maintenance transactions).
As it says: it cannot be removed or repaired. A patch is basically always “a
repair” (after the view is upgraded by applying the patch).
Blair
From: Mita Patel
Sent: Tuesday, January 14, 2014 1:59 PM
To: General discussion for Windows Installer XML toolset.
Re: Deleting files in a patch.
Applying the same logic to a patch does not work.
We set the component id for new files that do not need to be registered to
null. (to allow for deletion in future patches)
Then apply the patch. Resulting in the null component id files not getting
installed.
Message: 6
Date: Tue, 14 Jan 2014 11:29:15 -0800
From: Phil Wilson <phildgwil...@gmail.com>
Subject: Re: [WiX-users] Deleting files in a patch...
To: "General discussion for Windows Installer XML toolset."
<wix-users@lists.sourceforge.net>
Message-ID:
<CACZvpRZkcKk5z_XAk8ZdRchhJpcmwo1OH5+4AS5AuohBtXz=x...@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
It looks like you hijacked an existing discussion thread, so I'll start a new
one. ...
Yes, that's the way it works. That might not be the best way to remove files if
you decide you want them back later. An alternative is to make the component
transitive and use a property to make the actual file be present or absent, so
if you later decide you want the file present just set the property value. It
can be tricky to make that work in all cases, such as adding/removing features,
repair, patches etc because you need to preserve the property value that is
keeping the file present or absent.
"The msdn doc says the following for component id in the column table.
ComponentId --> If this column is null the installer does not register the
component and the component cannot be removed or repaired by the installer.
This might be intentionally done if the component is only needed during the
installation, such as a custom action that cleans up temporary files or removes
an old product. It may also be useful when copying data files to a user's
computer that do not need to be registered.
Does this mean in the full msi, components with null id will not be registered
and if deleted then will not put the msi in repair? Which further indicates
that at patch time we can call a custom action to delete these components ,
and this will not throw the msi in repair mode?"
Phil Wilson
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