Transitive Maven dependency not loaded even if added to module.ceylon

[akberc]

This may or may not be a bug.

• Maven jar A depends on B. B does not get loaded automatically as there is no module.xml.
• Include both A and B in module.ceylon. Still A does not find a class in B.
• Call any static method in B directly and the runtime loads B. Then, A works fine.

[gavinking]

But does Maven jar A actually declare its dependency to B in its maven metadata?

[akberc]

Yes, they do, and it gets pulled into the cache. I am using mvn:http// repo style and not aether.

The two I've tried are

• org.joni -> org.jcodings (call method asciiToUpper in jcodings makes joni OK)
• org.stringtemplate -> org.antlr (haven't tried calling a method in antlr yet)

[akberc]

Will investigate further tonight as it is not consistent. Sometimes, even the load trigger does not find the second jar.

module com.dgwave.lahore.template "0.1" {
    import ceylon.collection "0.6";
    import ceylon.io "0.6";
    import ceylon.test "0.6";

    import java.base "7";
    import org.jruby.joni.joni "2.0.0";
    import org.jruby.jcodings.jcodings "1.0.10";
}

And the code:

shared {String*} segments(String tosplit, String pattern) {
    variable {Character*} pat = pattern.characters;

    if (pattern.startsWith("/")) {
        pat = pat.skipping(1).takingWhile((Character c) => c != '/');
    }

    asciiToUpper(39); // trigger load of module

    Regex r = Regex(String(pat));

[FroMage]

The mvn repos don't support Maven dependencies defined in poms. I think that's your problem. We are not going to support it, but perhaps we should print a warning.

[akberc]

Not using Maven dependencies, the problem is that Ceylon code can access A, and Ceylon code can access B, but A cannot access B, resulting in no possible way to use A.

Possibly separate classloader for each module. I used to be able to trigger a load of B about a month ago, but not any more. But I can still call A and B from Ceylon code separately.

Since most Maven artefacts have dependencies, and with the workaround not working, the 'mvn' repo feature is basically not very useful.

[akberc]

Referencing https://github.com/ceylon/ceylon-runtime/issues/35

[FroMage]

Closing, we are going to remove the mvn repo.

[quintesse]

Not "going to", I already changed it some time ago, it's now an alias for "aether".