Fix: include returns undefined for classes

[plata]

For

class test { myMethod() {}}

it gives "undefined".
For

class test { myMethod() {}}
test

it gives "class test { myMethod() {}}".

This is caused by a bugfix in graaljs.

Affected:

• Verbs
• Plugins
• Settings

Possible solutions:

• (class C {})
• class C {}; C
• use old graaljs version (19.0.0)

see PhoenicisOrg/phoenicis#2040

[madoar]

I'm in favor of the third solution:

use old graaljs version (19.0.0)

because it is the quickest solution, leads to no problems for us as far as I know, and is also the easiest solution to reverse when we found a solution for PhoenicisOrg/phoenicis#2042

[plata]

I would vote for one of the other solutions because

• it allows us to update graaljs
• I have the feeling that we will not be able to use ES modules or node modules

[madoar]

What about extending our own include mechanism to provide explicit exports?
We could even try to execute included scripts in an isolated environment (i.e. their own polyglot context) and inject the populated result object in the calling script.

[plata]

What do we gain with explicit exports?
I don't think an isolated environment would work e.g. for engine plugins.

[madoar]

Explicit exports make the code easier to understand. In addition we are able to export multiple things in one script.

About executing the included scripts in an isolated environment:
It seems like this is blocked by oracle/graal#631

[madoar]

@plata I think this is fixed by #1076. Can we close this?