[JIRA] Created: (SSPCPP-433) Changes to the Installer Scripts in preparation for m

[Rod Widdowson (JIRA)]

Changes to the Installer Scripts in preparation for m
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                 Key: SSPCPP-433
                 URL: https://issues.shibboleth.net/jira/browse/SSPCPP-433
             Project: Shibboleth SP - C++
          Issue Type: Task
          Components: Installation / Packaging
    Affects Versions: 2.4.3
            Reporter: Rod Widdowson
            Assignee: Rod Widdowson
            Priority: Minor
             Fix For: 2.5


As per the discussions on Windows installer moving forwards (https://wiki.shibboleth.net/confluence/display/~rdw@iay.org.uk/SPWiXDiscussionDesign) we need to make a small change to the VBScript to uninstall IIS.  For the record:

- If for an Uninstall the registry value was empty at the start (prior to registry value deletion) then IIS was never installed and there is nothing to tear down.  [This is a change to the InstallScript - specifically the conditions to call the CustomAction]


- Equally if it is not empty after registry value deletion then this is an upgrade (and IIS should be left intact) otherwise this is a final uninstall and IIS should be torn down. [This is to the VBScript]

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