[JIRA] Resolved: (SSPCPP-433) Changes to the Installer Scripts in preparation for an eventual move to Wix

[Rod Widdowson (JIRA)]

     [ https://issues.shibboleth.net/jira/browse/SSPCPP-433?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rod Widdowson resolved SSPCPP-433.
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    Resolution: Fixed

The optimization to not call the script if IIS was not installed does not work because we do not have the way of finding this out (the Property we proposed is initialized)

It is an optimization anyway.

Checkin 3607 sees this done

> Changes to the Installer Scripts in preparation for an eventual move to Wix
> ---------------------------------------------------------------------------
>
>                 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
>
>   Original Estimate: 2 hours
>  Remaining Estimate: 2 hours
>
> 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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