Enabled CI on Windows and applied some fixes (#375)

* CI: also build on Windows

* Added Windows lookup path for coursier

* Consider windows line terminators too

* More line ending stuff

* Some comments

* .

Author: lefou

.github/workflows/ci.yml

@@ -12,10 +12,11 @@ on:
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
+        os: [ 'ubuntu-latest', 'windows-latest' ]
         java: [ '8', '11' ]
         scala: [
             { version: '2.11.12' },

scalac-scoverage-plugin/src/main/scala/scoverage/Serializer.scala

@@ -50,7 +50,7 @@ object Serializer {
                       |# - description (can be multi-line)
                       |# '\f' sign
                       |# ------------------------------------------
-                      |""".stripMargin)
+                      |""".stripMargin.replaceAll("(\r\n)|\n|\r", "\n"))
     }
 
     def writeStatement(stmt: Statement, writer: Writer): Unit = {
@@ -71,7 +71,7 @@ object Serializer {
                       |${stmt.ignored}
                       |${stmt.desc}
                       |\f
-                      |""".stripMargin)
+                      |""".stripMargin.replaceAll("(\r\n)|\n|\r", "\n"))
     }
 
     writeHeader(writer)

scalac-scoverage-plugin/src/test/scala/scoverage/ScoverageCompiler.scala

@@ -83,9 +83,12 @@ object ScoverageCompiler {
       version: String
   ): Option[File] = {
     val userHome = System.getProperty("user.home")
-    val jarPaths = Seq(
-      s"$userHome/.cache/coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/$artifactId/$version/$artifactId-$version.jar",
-      s"$userHome/Library/Caches/Coursier/v1/https/repo1.maven.org/maven2/org/scala-lang/$artifactId/$version/$artifactId-$version.jar"
+    val jarPaths = Iterator(
+      ".cache/coursier", // Linux
+      "Library/Caches/Coursier", // MacOSX
+      "AppData/Local/Coursier/cache" // Windows
+    ).map(loc =>
+      s"$userHome/$loc/v1/https/repo1.maven.org/maven2/org/scala-lang/$artifactId/$version/$artifactId-$version.jar"
     )
     jarPaths.map(new File(_)).find(_.exists())
   }

scalac-scoverage-plugin/src/test/scala/scoverage/SerializerTest.scala

@@ -67,7 +67,7 @@ class SerializerTest extends AnyFunSuite with OneInstancePerTest {
                       |false
                       |def test : String
                       |\f
-                      |""".stripMargin
+                      |""".stripMargin.replaceAll("(\r\n)|\n|\r", "\n")
     val writer = new StringWriter() //TODO-use UTF-8
     val actual = Serializer.serialize(coverage, writer)
     assert(expected === writer.toString)
@@ -111,7 +111,7 @@ class SerializerTest extends AnyFunSuite with OneInstancePerTest {
                    |false
                    |def test : String
                    |\f
-                   |""".stripMargin.split("\n").iterator
+                   |""".stripMargin.split("(\r\n)|\n|\r").iterator
     val statements = List(
       Statement(
         Location(