Added Github packages publishing (see README)

Author: m-tabaza

README.md

@@ -40,6 +40,8 @@ object Main extends App {
 
 To set up Scala & SBT, use [Coursier](https://get-coursier.io/docs/cli-installation). After getting the `cs` executable, run `cs setup` and follow the prompt.
 
+Compiling requires setting either the `GITHUB_TOKEN` environment variable, or a `github.token` Git configuration. Use `export GITHUB_TOKEN=<token>` or `git config --global github.token <token>`, where `<token>` can be generated in your GitHub account's [settings](https://github.com/settings/tokens).
+
 ### Testing
 
 To run the tests, run `sbt test` in this README's directory.
@@ -62,7 +64,7 @@ cmake .. # Use loader flags as specified in https://github.com/metacall/core/blo
 sudo make install
 ```
 
-> You need to set `LOADER_LIBRARY_PATH` to the build directory created in the script above
+> You need to set `LOADER_LIBRARY_PATH` to the build directory created in the script above before running `sbt`, i.e. `LOADER_LIBRARY_PATH=path/to/core/build sbt`
 
 To run the tests in Docker, run `sbt` then `docker` to build the image (must run `docker` from within the SBT session), and then `sbt dockerTest` to run it. Note that you should build the `metacall/core:dev` image locally since the published one might not be up to date by running `./docker-compose.sh build` in `metacall/core`'s root. Pay attention to SBT's error messages.
 
@@ -87,3 +89,7 @@ Then copy the classpath into the valgrind command:
 ```
 valgrind --tool=memcheck --trace-children=yes --error-limit=no scala -Djava.compiler=NONE -cp <classpath> src/test/scala/MetaCallSpecMain.scala
 ```
+
+# Publishing
+
+Use `sbt publish` to publish to GitHub Packages using [sbt-github-packages](https://github.com/djspiewak/sbt-github-packages). Make sure your GitHub token is set correctly according to [Setup](#setup).

build.sbt

@@ -1,11 +1,11 @@
 import Tests._
 
 lazy val commonSettings = Seq(
-  name := "metacall",
+  name := "metacall-scala",
   scalaVersion := "2.13.4",
-  version := "0.1.0-SNAPSHOT",
-  organization := "com.metacall",
-  organizationName := "metacall",
+  version := "0.1.0",
+  organization := "io.metacall",
+  organizationName := "MetaCall",
   scalacOptions ++= Seq(
     // Only for debugging purposes
     // "-Djava.compiler=NONE",
@@ -58,6 +58,12 @@ lazy val root = (project in file("."))
     testGrouping in Test := (testGrouping in Test).value.flatMap { group =>
       group.tests map (test => Group(test.name, Seq(test), SubProcess(ForkOptions())))
     },
+    githubSuppressPublicationWarning := true,
+    githubOwner := "metacall",
+    githubRepository := "core",
+    githubTokenSource :=
+      TokenSource.Environment("GITHUB_TOKEN") ||
+        TokenSource.GitConfig("github.token"),
     dockerfile in docker := new Dockerfile {
       from("metacall/core:dev")
 

project/plugins.sbt

@@ -1 +1,2 @@
-addSbtPlugin("se.marcuslonnberg" % "sbt-docker" % "1.8.2")
+addSbtPlugin("se.marcuslonnberg" % "sbt-docker" % "1.8.2")
+addSbtPlugin("com.codecommit" % "sbt-github-packages" % "0.5.2")

src/main/scala/Ptr.scala

@@ -4,7 +4,7 @@ import com.sun.jna._
 import metacall.util._
 import concurrent.Future
 
-/** Create a [[Ptr]] to MetaCall value of type [[A]] */
+/** Create a [[Ptr]] to MetaCall value of type `A` */
 trait Create[A] {
   def create(value: A): Ptr[A]
 }