Pieradmin install error: Missing class ImageSegment

Question

I'm attempting to install Pieradmin on a clean image of Pharo 1.4 (Summer), using the commands:

Gofer it
    renggli: 'pier2addons';
    package: 'ConfigurationOfPierAdmin';
    load.

ConfigurationOfPierAdmin loadBleedingEdge.

It progresses for a while and comes up with the error:

This package depends on the following classes:
    ImageSegment
You must resolve these dependencies before you will be able to load these definitions: 
    writeKernel:on:

You can proceed and it will finish installing all its dependencies.

I have two questions:

• Where can I get the class ImageSegment?
• Or, if I can't, does it matter that writeKernel:on: isn't there?

Answer 1

Nathan,

The dependency on ImageSegment is almost certainly coming from the package Pier-Pharo-Persistency defined in ConfigurationOfPier2>>baseline2060: where it is included as part of Core group for Pier ... which at first glance makes it appear that the Pier-Pharo-Persistency is pretty much required for Pier.

You could fiddle with the ConfigurationOfPier2>>baseline2060: and remove Pier-Pharo-Persistency from the Core group, then try the load again, but you may just be creating another more subtle problem for yourself. It's probably a good idea to ask this question on the Pier mailing list

OTOH, I'm pretty sure that Pier-Admin works in Pharo-1.3 so that would be your best option.

Dale

Answer 2

Yes, ImageSegment was removed from Pharo 1.4. And ReferenceStream was also removed from Pharo 2.0. The idea was to rely on new and better tools like Fuel serializer (see http://rmod.lille.inria.fr/web/pier/software/Fuel).

Yanni and me have done 2 things: Pier persistence and kernel export/import based on Fuel. You can find the code in:

Gofer it
    squeaksource3: 'pierfuel';
    package: 'Pier-FuelPersistence-Core';
    package: 'Pier-FuelPersistence-Test';
    load.

Then you can do, for example:

 PRFuelExporterImporter new exportKernelNamed: 'pierDBX' toFilename: 'pierDBX.fuel' 

And:

 PRFuelExporterImporter new importNewKernelNamed: 'pierDBX' fromFilename: 'pierDBX.fuel'