support Scala Native

[aoiroaoino]

first support: core, state

> show coreNative/nativeMissingDependencies
[info] * @java.net.URI
[info] * @java.net.URI::init_class.java.lang.String
[info] * @java.net.URI::toString_class.java.lang.String
[success] Total time: 4 s, completed 2017/03/17 0:27:58
> show stateNative/nativeMissingDependencies
[info] *
[success] Total time: 1 s, completed 2017/03/17 0:28:05
> show testNative/nativeMissingDependencies
[info] *
[success] Total time: 1 s, completed 2017/03/17 0:28:16

we need remove java.net.URI ...? 🤔 /cc @densh @MasseGuillaume
https://github.com/julien-truffaut/Monocle/blob/v1.4.0/core/shared/src/main/scala/monocle/std/String.scala#L35-L36

[julien-truffaut]

Nice! About java.net.URI does it mean it would blow up at runtime or compile time if you try to use URI natively?

[xuwei-k]

I think compile time

[aoiroaoino]

runtime ...?

object Main {
  ...
  val uri = monocle.std.string.stringToURI.getOption("http://example.com")
}

> testNative/compile
[info] Compiling 1 Scala source to /Users/aoino/git/Monocle/testNative/target/scala-2.11/classes...
[success] Total time: 1 s, completed 2017/03/17 20:00:50
> testNative/run
[info] Linking NIR (623 ms)
[error] cannot link: @java.net.URI
[error] cannot link: @java.net.URI::init_class.java.lang.String
[error] cannot link: @java.net.URI::toString_class.java.lang.String
[error] unable to link
[error] (testNative/*:nativeLink) unable to link
[error] Total time: 1 s, completed 2017/03/17 20:00:53

[xuwei-k]

The run task depends on the nativeLink task

• https://github.com/scala-native/scala-native/blob/v0.1.0/sbt-scala-native/src/main/scala/scala/scalanative/sbtplugin/ScalaNativePlugin.scala#L32
• https://github.com/scala-native/scala-native/blob/v0.1.0/sbt-scala-native/src/main/scala/scala/scalanative/sbtplugin/ScalaNativePluginInternal.scala#L406

Your cannot link error is during nativeLink task, not runtime.

• compile or package: create .nir files from "Scala sources". no errors if there is MissingDependencies
• nativeLink: create executable binary file from .nir files. error if there is MissingDependencies

[julien-truffaut]

Ok so it means, you will not be able to use stringToURI in native but as you cannot deal with java.net.URI natively, I don't think it will be an issue.

[julien-truffaut]

👍

[aoiroaoino]

@julien-truffaut @xuwei-k
thanks!