provide pre-install hook for applications

[line-o]

What is the problem

Install an app A in version x and modify some data.

Now update A to a new version y.

In order to be able to backup or migrate the data in the running instance of A the installation process has to have a hook where:

• The application versions of the current and the new one are known.
• No data was deleted.
• a script is run when defined in repo.xml

What did you expect

I expected that the <setup/> hook would provide this. But it seems that the current data is removed too early.

Describe how to reproduce or add a test

see above

Context information

Please always add the following information

• affected versions eXist-db 3.x.x and 4.x.x have not tested on the release candidates yet
• Java 8
• tested on Linux and MacOs
• 64 bit
• built from source and started with bin/startup.sh

[duncdrum]

there is a setup hook for repo.xml??
needs documentation

[line-o]

I know, found it by reading source code :)

https://github.com/eXist-db/exist/blob/develop/src/org/exist/repo/Deployment.java#L354

[duncdrum]

see eXist-db/documentation#164

[adamretter]

@line-o @duncdrum Can we close this now?

[duncdrum]

@adamretter afaik its still not working, and not-documented why would we close this?

[adamretter]

I thought from the conversation above it was fixed

[duncdrum]

no a) the hook exists but isn't working, b) the existence of the hook is not documented.

[duncdrum]

@joewiz might be of interest
see eXist-db/public-repo#39