Add blaze build script command to test against Java 21, 17, 11, and 8

.blaze/blaze.conf

@@ -0,0 +1,3 @@
+blaze.dependencies = [
+  "com.fizzed:jne:4.1.1"
+]

.blaze/blaze.java

@@ -3,20 +3,28 @@
 import static com.fizzed.blaze.Contexts.fail;
 import static com.fizzed.blaze.Contexts.withBaseDir;
 import static com.fizzed.blaze.Systems.exec;
+import static java.util.Arrays.asList;
+
 import com.fizzed.blaze.Task;
 import com.fizzed.blaze.util.Streamables;
 import java.io.BufferedWriter;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.StandardCopyOption;
+import java.util.ArrayList;
+import java.util.List;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
+
+import com.fizzed.jne.JavaHome;
+import com.fizzed.jne.JavaHomeFinder;
 import org.slf4j.Logger;
 
 public class blaze {
-    static private final Logger log = Contexts.logger();
-    static private final Config config = Contexts.config();
+    private final Logger log = Contexts.logger();
+    private final Config config = Contexts.config();
+    private final Path projectDir = withBaseDir("../").toAbsolutePath();
 
     @Task(order=1, value="Demo of parsing a template and logs its structure. Argument of -Drocker.file=<file>")
     public void parser() {
@@ -63,7 +71,46 @@ public void netty() {
             "-DskipTests=true", "-Dexec.classpathScope=test",
             "-Dexec.mainClass=com.fizzed.rocker.bin.NettyMain").run();
     }
-
+
+    @Task(order = 20)
+    public void test_all_jdks() throws Exception {
+        // collect and find all the jdks we will test on
+        final List<JavaHome> jdks = new ArrayList<>();
+        for (int jdkVersion : asList(21, 17, 11, 8)) {
+            jdks.add(new JavaHomeFinder()
+                .jdk()
+                .version(jdkVersion)
+                .preferredDistributions()
+                .sorted()
+                .find());
+        }
+
+        log.info("Detected JDKs:");
+        jdks.forEach(jdk -> log.info("  {}", jdk));
+
+        for (JavaHome jdk : jdks) {
+            try {
+                log.info("");
+                log.info("Using JDK {}", jdk);
+                log.info("");
+
+                exec("mvn", "clean", "test")
+                    .workingDir(this.projectDir)
+                    .env("JAVA_HOME", jdk.getDirectory().toString())
+                    .verbose()
+                    .run();
+            } catch (Exception e) {
+                log.error("");
+                log.error("Failed on JDK " + jdk);
+                log.error("");
+                throw e;
+            }
+        }
+
+        log.info("Success on JDKs:");
+        jdks.forEach(jdk -> log.info("  {}", jdk));
+    }
+
     @Task(order=99, value="Use by maintainers only. Updates REAME.md with latest git tag.")
     public void after_release() throws Exception {
         int exitValue = (int)exec("git", "diff-files", "--quiet")

.blaze/pom.xml

@@ -60,5 +60,10 @@
       <artifactId>zt-exec</artifactId>
       <version>1.12</version>
     </dependency>
+    <dependency>
+      <groupId>com.fizzed</groupId>
+      <artifactId>jne</artifactId>
+      <version>4.1.1</version>
+    </dependency>
   </dependencies>
 </project>

rocker-test-template/pom.xml

@@ -105,7 +105,7 @@
         </dependency>
 
         <!-- test -->
-
+        <!---->
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>