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scala-native bootstrap

The bootstrap command of coursier can generate Scala Native-based native launchers.

This requires the application you want a launcher for to be cross-compiled to Scala Native, and its Scala Native artifacts to be published to Maven or Ivy repositories. The echo project of coursier has such a module, currently published as io.get-coursier:echo_native0.3_2.11:1.0.2.

Usage

In order to generate a launcher for such a published application, you'll need to have your environment set up for Scala Native. You can then generate native launchers by passing the --native or -S option to the bootstrap command, like

$ coursier bootstrap \
    --native \
    io.get-coursier:echo_native0.3_2.11:1.0.2 \
    -o echo
[info] Linking (2354 ms)
[info] Discovered 1291 classes and 9538 methods
…

and run them, like

$ ./echo hey
hey

Linking flags during the linking phase can be adjusted via LDFLAGS in the environment.

Pros and cons

As an application author, thanks to this command, you don't have to generate, package, then distribute launchers for every platform. Instead, just publish the Scala Native artifacts to Maven or Ivy repositories, like you would for a JVM library, and let your users build native executables themselves via a coursier boostrap --native command. Users can generate launchers adapted to their own environment. A drawback of this approach is that it requires users to have their machine set up for Scala Native, at least when they generate their launcher.