Add OS matrix for Ubuntu, Windows and macOS

.github/workflows/bld.yml

@@ -1,14 +1,16 @@
 name: bld-ci
 
-on: [push, pull_request, workflow_dispatch]
+on: [ push, pull_request, workflow_dispatch ]
 
 jobs:
   build-bld-project:
-    runs-on: ubuntu-latest
-
     strategy:
       matrix:
-        java-version: [17, 21, 24]
+        java-version: [ 17, 21, 24 ]
+        kotlin-version: [ 1.9.25, 2.0.21, 2.1.20 ]
+        os: [ ubuntu-latest, windows-latest, macos-latest ]
+
+    runs-on: ${{ matrix.os }}
 
     steps:
       - name: Checkout source repository
@@ -22,8 +24,16 @@ jobs:
           distribution: "zulu"
           java-version: ${{ matrix.java-version }}
 
+      - name: Download dependencies [examples]
+        working-directory: examples
+        run: ./bld download
+
+      - name: Compile and run JaCoCo [examples]
+        working-directory: examples
+        run: ./bld compile jacoco
+
       - name: Download dependencies
         run: ./bld download
 
       - name: Run tests
-        run: ./bld compile test
+        run: ./bld compile test

src/bld/java/rife/bld/extension/JacocoReportOperationBuild.java

@@ -100,10 +100,13 @@ public class JacocoReportOperationBuild extends Project {
 
     @Override
     public void test() throws Exception {
-        new ExecOperation()
+        var os = System.getProperty("os.name");
-                .fromProject(this)
+        if (os != null && os.toLowerCase().contains("linux")) {
-                .command("scripts/cliargs.sh")
+            new ExecOperation()
-                .execute();
+                    .fromProject(this)
+                    .command("scripts/cliargs.sh")
+                    .execute();
+        }
         super.test();
     }
 }

src/test/java/rife/bld/extension/JacocoReportOperationTest.java

@@ -18,6 +18,8 @@ package rife.bld.extension;
 
 import org.assertj.core.api.AutoCloseableSoftAssertions;
 import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.condition.EnabledOnOs;
+import org.junit.jupiter.api.condition.OS;
 import rife.bld.Project;
 import rife.bld.operations.exceptions.ExitStatusException;
 
@@ -58,6 +60,7 @@ class JacocoReportOperationTest {
     }
 
     @Test
+    @EnabledOnOs(OS.LINUX)
     void checkAllParamsTest() throws IOException {
         var supported = List.of("<execfiles>",
                 "--classfiles",