Add support for Windows (#492)

This adds support for Windows.
The in-language path separator is still `/`, to ensure Pkl programs are cross-platform.

Log lines are written using CRLF endings on Windows.
Modules that are combined with `--module-output-separator` uses LF endings to ensure
consistent rendering across platforms.

`jpkl` does not work on Windows as a direct executable.
However, it can work with `java -jar jpkl`.

Additional details:

* Adjust git settings for Windows
* Add native executable for pkl cli
* Add jdk17 windows Gradle check in CI
* Adjust CI test reports to be staged within Gradle rather than by shell script.
* Fix: encode more characters that are not safe Windows paths
* Skip running tests involving symbolic links on Windows (these require administrator privileges to run).
* Introduce custom implementation of `IoUtils.relativize`
* Allow Gradle to initialize ExecutableJar `Property` values
* Add Gradle flag to enable remote JVM debugging

Co-authored-by: Philip K.F. Hölzenspies <holzensp@gmail.com>

pkl-gradle/src/main/java/org/pkl/gradle/task/ModulesTask.java

@@ -134,7 +134,7 @@ public abstract class ModulesTask extends BasePklTask {
    */
   private URI parsedModuleNotationToUri(Object notation) {
     if (notation instanceof File file) {
-      return IoUtils.createUri(file.getPath());
+      return IoUtils.createUri(IoUtils.toNormalizedPathString(file.toPath()));
     } else if (notation instanceof URI uri) {
       return uri;
     }

pkl-gradle/src/test/kotlin/org/pkl/gradle/EvaluatorsTest.kt

@@ -2,7 +2,9 @@ package org.pkl.gradle
 
 import org.assertj.core.api.Assertions
 import org.pkl.commons.readString
+import org.pkl.commons.readString
 import org.pkl.commons.test.PackageServer
+import org.pkl.commons.toNormalizedPathString
 import org.assertj.core.api.Assertions.assertThat
 import org.junit.jupiter.api.Test
 import org.junit.jupiter.api.io.TempDir
@@ -199,8 +201,8 @@ class EvaluatorsTest : AbstractTest() {
 
   @Test
   fun `source module URIs`() {
-    val pklFile = writeFile(
-      "test.pkl", """
+    writeFile(
+      "testDir/test.pkl", """
       person {
         name = "Pigeon"
         age = 20 + 10
@@ -218,7 +220,7 @@ class EvaluatorsTest : AbstractTest() {
         evaluators {
           evalTest {
             sourceModules = [uri("modulepath:/test.pkl")]
-            modulePath.from "${pklFile.parent}"
+            modulePath.from layout.projectDirectory.dir("testDir")
             outputFile = layout.projectDirectory.file("test.pcf")
             settingsModule = "pkl:settings"
           }
@@ -387,7 +389,7 @@ class EvaluatorsTest : AbstractTest() {
   @Test
   fun `explicitly set cache dir`(@TempDir tempDir: Path) {
     writeBuildFile("pcf", """
-      moduleCacheDir = file("$tempDir")
+      moduleCacheDir = file("${tempDir.toUri()}")
     """.trimIndent())
     writeFile(
       "test.pkl",

pkl-gradle/src/test/kotlin/org/pkl/gradle/TestsTest.kt

@@ -1,6 +1,7 @@
 package org.pkl.gradle
 
 import org.assertj.core.api.Assertions.assertThat
+import org.pkl.commons.toNormalizedPathString
 import org.junit.jupiter.api.Test
 import java.nio.file.Path
 import kotlin.io.path.readText
@@ -46,8 +47,7 @@ class TestsTest : AbstractTest() {
 
     val output = runTask("evalTest", expectFailure = true).output.stripFilesAndLines()
 
-    assertThat(output.trimStart()).startsWith("""
-      > Task :evalTest FAILED
+    assertThat(output).contains("""
       module test (file:///file, line x)
         test ❌
           Error:
@@ -143,7 +143,7 @@ class TestsTest : AbstractTest() {
     val pklFile = writePklFile(contents = bigTest)
     writeFile("test.pkl-expected.pcf", bigTestExpected)
 
-    writeBuildFile("junitReportsDir = file('${pklFile.parent}/build')")
+    writeBuildFile("junitReportsDir = file('${pklFile.parent.toNormalizedPathString()}/build')")
 
     runTask("evalTest", expectFailure = true)