java_stub_template.txt as used in kotlin_rules does not work on windows.

[hsyed]

I shouldn't have tackled the windows issue at this point I thought it would a quick job. Anyhow the embedded classpath variable has not been resolved off the correct RUNPATH.

Here is how the rules expand the template

I copied and adapted the underlying code from the scala rules removing stuff that I didn't think was needed.

This might apply to the scala_rules as well although it wraps the script. I see the classpath variable is produced with a ":".join([...]) so its not windows compatible.

I updated the variables to include the following just in case.

...
            "%needs_runfiles%": "1",
            "%runfiles_manifest_only%": "",
...

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On a side note is the stub template available from one of the tool workspaces ? The scala and kotlin rules are retrieving it via http_file.

[lfpino]

Assigning to @iirina for triage.

[dslomov]

Please do not assign issues to more than one team.

[laszlocsomor]

rules_kotlin maintainers are planning to opensource Google's own Kotlin 1.3 rules.
I expect that if they find problems on Windows, they'll file bugs.
So I'll close this bug now -- please reopen if it makes sense to.