a giter8 template for a jni + scala project based on sbt-jni

Generate projects that have:

• a scala app built in the root project
• a cpp native lib built in a sub-project dependency
• a superjar containing the native shared libs - ready to run

USAGE

Generate Your Project

sbt new navicore/navijni.g8

Build and run the generated project

cd into the newly created project dir and:

sbt javah run

Deploy the generated project

sbt javah assembly

• copy the superjar from target/scala-2.12/ to your installation
• run via:

java -jar target/scala-2.12/<YOUR PROJECT NAME>.jar

FURTHER DEVELOPMENT OF YOUR PROJECT

1. edit your generated Scala native wrapper found in src/main/scala, adding, changing, and deleting native methods
2. rerun sbt javah
3. edit the native module in native/src and implement the functions from the javah generated header file found in target/native/include/
4. edit native/src/CMakeLists.txt adding external native libs that need linking, ie add the following after add_library if you are linking libwiringPi:

   find_library(wiringPi_LIB wiringPi)
   target_link_libraries(${LIB_NAME} ${wiringPi_LIB})
   

5. sbt javah test
6. sbt javah run
7. sbt javah assembly to create superjar

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TODO:

• test, run, assembly should automatically javah
• cross compiling (Raspberry PI, MacOS, Intel Linux, etc...)
• a compilation database automatically generated (via bear / Build EAR?)
• document publishing the lib to maven