Upgrade to Kotlin 1.1-beta [SPR-15100]

[spring-projects-issues]

Sébastien Deleuze opened SPR-15100 and commented

We are currently using Kotlin 1.0.6, but it does not support Kotlin Script, producing Java 8 bytecode and other improvements provided by Kotlin 1.1.

But Kotlin 1.1-M04 has 2 blocking points that prevent us to upgrade:

• It can't produce Kotlin 1.0 compatible bytecode even when specifying apiVersion = 1.0 and languageVersion = 1.0
• Kotlin IDEA plugin 1.1-M04 does not work in a reliable way with kotlin-spring plugin

Kotlin 1.1-beta should be released in the coming weeks, and will allow us to upgrade to this version in order to re-enable Kotlin Script template rendering.

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Issue Links:

• Generate Java 8 bytecode with Kotlin compiler [SPR-15183] #19749 Generate Java 8 bytecode with Kotlin compiler

Referenced from: commits 35d5dca

[spring-projects-issues]

Juergen Hoeller commented

Is it a requirement for us to produce Kotlin 1.0 compatible bytecode with our 5.0 GA? I suppose that's a transitional problem only until Kotlin 1.1 GA is available? From my perspective, our 5.0 GA can easily integrate with Kotlin 1.1 proper...

[spring-projects-issues]

Sébastien Deleuze commented

Indeed, now that Kotlin 1.1-beta is out with kotlin-spring support out of the box I think we can target Kotlin 1.1 (that can produces Java 8 bytecode).