Add support for Groovy based migration scripts

[tcrespog]

Closes #26.

[pditommaso]

Looks neat 👍 Just a minor comment

[tcrespog]

Now that I see tests having to do with native compilation failing... I think Groovy support is incompatible with native compilation, especially to the extent that we want to use it (run any scripts) 😞.

[pditommaso]

The guru here is @jorgeaguileraseqera!

[jorgeaguileraseqera]

I don't think Graalvm will allow GroovyShell execute arbitrary code

With some little effort, I was able to run the groovy code in a native way but when the GroovyShell parses the resource it fires an Exception:

No classes have been predefined during the image build to load from bytecodes at runtime

[tcrespog]

Thanks for looking into it, Jorge.

With some little effort, I was able to run the groovy code in a native way but when the GroovyShell parses the resource it fires an Exception

What a pity! However, I think it's acceptable so long as we are aware of the limitation. As long as SQL scripts run fine using the native image, we could live with that.

[pditommaso]

Check the paragraph "Mixing AOT and JIT"

https://medium.com/graalvm/java-on-truffle-going-fully-metacircular-215531e3f840