Re: pre-install
Re: pre-install
- Subject: Re: pre-install
- From: Bill Coderre <email@hidden>
- Date: Tue, 12 Sep 2006 11:49:41 -0700
On Sep 12, 2006, at 9:41 AM, Eric Blanpied wrote:
I'm updating a packagemaker installer that previously installed a
set of three PPC QuickTime components to install the Universal
version of the same software. The catch is that the new QT
component is just one file, and the two that don't get replaced
appear to be incompatible with the new code.
So I need to look for the old components and delete them before
installing. Can someone point me at an example along these lines?
If you use the same package name (in Panther and older) or if you use
the same CFBundleIdentifier (in Tiger and later), files that are in
the receipt of the old package but not in the new package are removed.
The installer calls this "upgrade mode."
If you'd rather not rely on receipts being there, it's quite OK to
delete files and folders during an executable that runs before
installation or after installation. Apple frequently uses those kinds
of scripts to clean up.
Be very careful what you delete! These scripts are usually running as
ROOT, so if the worst comes to worst, you might end up doing "rm -
rf / My Volume Name/"
The specifics of which executables are run when are documented in the
"Software Delivery Guide":
http://developer.apple.com/documentation/DeveloperTools/Conceptual/
SoftwareDistribution/index.html
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| | >pre-install (From: Eric Blanpied <email@hidden>) |