Added Scala language support and hello world example (#37)

* Added Scala language supoort and hello world example

* Small fixes

* Updated ubuntu iso version for genrules examples

* Update WORKSPACE

Co-authored-by: Jay Conrod <[email protected]>

* Update scala/BUILD

Co-authored-by: Jay Conrod <[email protected]>

* Re organized scala example with test case (same as java)

* Fixed ubuntu name

* rules_scala_version in uppercase

Co-authored-by: Jay Conrod <[email protected]>

Author: anfelbar

WORKSPACE

@@ -1,3 +1,5 @@
+workspace(name = "example")
+
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_file")
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
@@ -14,10 +16,10 @@ http_file(
 
 http_file(
     name = "ubuntu_20.04_1.3GB",
-    sha256 = "28ccdb56450e643bad03bb7bcf7507ce3d8d90e8bf09e38f6bd9ac298a98eaad",
+    sha256 = "5035be37a7e9abbdc09f0d257f3e33416c1a0fb322ba860d42d74aa75c3468d4",
     urls = [
-        "https://mirror.math.princeton.edu/pub/ubuntu-iso/focal/ubuntu-20.04.4-live-server-amd64.iso",
-        "https://mirror.pit.teraswitch.com/ubuntu-releases/focal/ubuntu-20.04.4-live-server-amd64.iso",
+        "https://mirror.math.princeton.edu/pub/ubuntu-iso/focal/ubuntu-20.04.5-live-server-amd64.iso",
+        "https://mirror.pit.teraswitch.com/ubuntu-releases/focal/ubuntu-20.04.5-live-server-amd64.iso",
     ],
 )
 
@@ -122,3 +124,30 @@ maven_install(
 load("@maven//:compat.bzl", "compat_repositories")
 
 compat_repositories()
+
+
+RULES_SCALA_VERSION = "20220201"
+
+http_archive(
+    name = "io_bazel_rules_scala",
+    sha256 = "77a3b9308a8780fff3f10cdbbe36d55164b85a48123033f5e970fdae262e8eb2",
+    strip_prefix = "rules_scala-%s" % RULES_SCALA_VERSION,
+    type = "zip",
+    url = "https://github.com/bazelbuild/rules_scala/archive/%s.zip" % RULES_SCALA_VERSION,
+)
+
+load("@io_bazel_rules_scala//:scala_config.bzl", "scala_config")
+
+scala_config()
+
+load("@io_bazel_rules_scala//scala:scala.bzl", "scala_repositories")
+
+scala_repositories()
+
+load("@io_bazel_rules_scala//scala:toolchains.bzl", "scala_register_toolchains")
+
+scala_register_toolchains()
+
+load("@io_bazel_rules_scala//testing:scalatest.bzl", "scalatest_repositories", "scalatest_toolchain")
+scalatest_repositories()
+scalatest_toolchain()

scala/com/engflow/example/BUILD

@@ -0,0 +1,13 @@
+load("@io_bazel_rules_scala//scala:scala.bzl", "scala_library", "scala_test")
+
+scala_library(
+    name = "exampleScala",
+    srcs = ["ScalaExample.scala"],
+    #main_class = "com.engflow.example.ScalaExample",
+)
+
+scala_test(
+    name = "exampleScalaTest",
+    srcs = ["ScalaExampleTest.scala"],
+    deps = [":exampleScala"],
+)

scala/com/engflow/example/ScalaExample.scala

@@ -0,0 +1,16 @@
+package com.engflow.example;
+
+object ScalaExample {
+  def fizzbuzz(i: Int): String = {
+    if (i % 3 == 0){
+      if (i % 5 == 0){
+        return "FizzBuzz";
+      }
+      return "Fizz";
+    } else if (i % 5 == 0){
+      return "Buzz";
+    } else {
+      return Integer.toString(i);
+    }
+  }
+}

scala/com/engflow/example/ScalaExampleTest.scala

@@ -0,0 +1,13 @@
+package com.engflow.example
+import org.scalatest.FunSuite
+
+class ScalaExampleTest extends FunSuite  {
+    test ("engflow scala tests") {
+        assert("1" == ScalaExample.fizzbuzz(1))
+        assert("2" == ScalaExample.fizzbuzz(2))
+        assert("Fizz" == ScalaExample.fizzbuzz(3))
+        assert("4" == ScalaExample.fizzbuzz(4))
+        assert("Buzz" == ScalaExample.fizzbuzz(5))
+        assert("FizzBuzz" == ScalaExample.fizzbuzz(15))
+    }
+}