Migrate JinjavaConfig and LegacyOverrides to @Value.Immutable

Switch from hand-rolled builder POJOs to Immutables-generated interfaces.
Adds JinjavaImmutableStyle, ContextConfiguration (replacing ContextConfigurationIF),
ErrorHandlingStrategy, and updates all call sites to the new builder API.
Also restricts checkstyle to src/main/java to exclude generated Immutables code.

Author: jasmith-hs

3.0-changes.md

@@ -0,0 +1,6 @@
+- Migrated JinjavaConfig to immutable
+- Removed whitespaceRequiredWithinTokens LegacyOverride and converted to BuiltinFeatures
+- Nested interpretation disabled by default
+- Removed restricted methods and properties from JinjavaConfig
+- Turn on all current LegacyOverrides by default
+- Use MethodValidator and ReturnTypeValidator to enforce method invocations and objects returned by ELResolver

CHANGES.md

@@ -1,23 +1,9 @@
 # Jinjava Releases #
-### 2026-02-02 Version 2.8.3 ([Maven Central](https://search.maven.org/artifact/com.hubspot.jinjava/jinjava/2.8.3/jar)) ###
-* Disallow accessing properties on restricted classes while rendering through ForTag
-* Upgrade jackson to version 2.20
-* [Add performance optimization to chained filters](https://github.com/HubSpot/jinjava/pull/1274)
-
-### 2026-02-02 Version 2.7.6 ([Maven Central](https://search.maven.org/artifact/com.hubspot.jinjava/jinjava/2.7.6/jar)) ###
-* Disallow accessing properties on restricted classes while rendering through ForTag
-* Upgrade jackson to version 2.20
-
 ### 2025-10-22 Version 2.8.2 ([Maven Central](https://search.maven.org/artifact/com.hubspot.jinjava/jinjava/2.8.2/jar)) ###
 * [Fix helper token escape handling and unescaping when unquoting strings](https://github.com/HubSpot/jinjava/pull/1263)
-
-### 2025-09-30 Version 2.7.5 ([Maven Central](https://search.maven.org/artifact/com.hubspot.jinjava/jinjava/2.7.5/jar)) ###
-* Disallow accessing properties on restricted classes while rendering
-
 ### 2025-09-16 Version 2.8.1 ([Maven Central](https://search.maven.org/artifact/com.hubspot.jinjava/jinjava/2.8.1/jar)) ###
 * Disallow accessing properties on restricted classes while rendering
 * [Make stack operations use AutoCloseable for safer usage with try-with-resources](https://github.com/HubSpot/jinjava/pull/1250)
-
 ### 2025-05-05 Version 2.8.0 ([Maven Central](https://search.maven.org/artifact/com.hubspot.jinjava/jinjava/2.8.0/jar)) ###
 * [Target Java 17](https://github.com/HubSpot/jinjava/pull/1238)
 * [Implement PyMap#get with optional default](https://github.com/HubSpot/jinjava/pull/1233)

README.md

@@ -78,7 +78,7 @@ You will likely want to provide your own implementation of
 `ResourceLoader` to hook into your application's template repository, and then tell jinjava about it:
 
 ```java
-JinjavaConfig config = new JinjavaConfig();
+JinjavaConfig config = JinjavaConfig.builder().build();
 
 Jinjava jinjava = new Jinjava(config);
 jinjava.setResourceLocator(new MyCustomResourceLocator());
@@ -87,7 +87,7 @@ jinjava.setResourceLocator(new MyCustomResourceLocator());
 To use more than one `ResourceLocator`, use a `CascadingResourceLocator`. 
 
 ```java
-JinjavaConfig config = new JinjavaConfig();
+JinjavaConfig config = JinjavaConfig.builder().build();
 
 Jinjava jinjava = new Jinjava(config);
 jinjava.setResourceLocator(new MyCustomResourceLocator(), new FileResourceLocator());

pom.xml

@@ -104,6 +104,11 @@
         <artifactId>immutables-exceptions</artifactId>
         <version>${dep.hubspot-immutables.version}</version>
       </dependency>
+      <dependency>
+        <groupId>com.hubspot.immutables</groupId>
+        <artifactId>immutable-collection-encodings</artifactId>
+        <version>${dep.hubspot-immutables.version}</version>
+      </dependency>
       <dependency>
         <groupId>com.hubspot</groupId>
         <artifactId>algebra</artifactId>
@@ -184,6 +189,7 @@
     <dependency>
       <groupId>com.google.errorprone</groupId>
       <artifactId>error_prone_annotations</artifactId>
+      <scope>runtime</scope>
     </dependency>
 
     <dependency>
@@ -217,18 +223,15 @@
       <scope>provided</scope>
     </dependency>
     <dependency>
-      <groupId>com.hubspot.immutables</groupId>
-      <artifactId>hubspot-style</artifactId>
-      <scope>provided</scope>
+      <groupId>com.hubspot</groupId>
+      <artifactId>algebra</artifactId>
     </dependency>
     <dependency>
       <groupId>com.hubspot.immutables</groupId>
-      <artifactId>immutables-exceptions</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>com.hubspot</groupId>
-      <artifactId>algebra</artifactId>
+      <artifactId>immutable-collection-encodings</artifactId>
+      <scope>provided</scope>
     </dependency>
+
   </dependencies>
 
   <build>
@@ -266,6 +269,12 @@
               <encoding>UTF-8</encoding>
               <consoleOutput>true</consoleOutput>
               <failsOnError>true</failsOnError>
+              <sourceDirectories>
+                <sourceDirectory>${project.build.sourceDirectory}</sourceDirectory>
+              </sourceDirectories>
+              <testSourceDirectories>
+                <testSourceDirectory>${project.build.testSourceDirectory}</testSourceDirectory>
+              </testSourceDirectories>
             </configuration>
           </execution>
         </executions>

src/main/java/com/hubspot/jinjava/Jinjava.java

@@ -20,7 +20,6 @@
 import com.hubspot.jinjava.el.ExtendedSyntaxBuilder;
 import com.hubspot.jinjava.el.TruthyTypeConverter;
 import com.hubspot.jinjava.el.ext.eager.EagerExtendedSyntaxBuilder;
-import com.hubspot.jinjava.interpret.AutoCloseableSupplier.AutoCloseableImpl;
 import com.hubspot.jinjava.interpret.Context;
 import com.hubspot.jinjava.interpret.FatalTemplateErrorsException;
 import com.hubspot.jinjava.interpret.InterpretException;
@@ -74,7 +73,7 @@ public class Jinjava {
    * Create a new Jinjava processor instance with the default global config
    */
   public Jinjava() {
-    this(new JinjavaConfig());
+    this(JinjavaConfig.newBuilder().build());
   }
 
   /**
@@ -246,14 +245,10 @@ public RenderResult renderForResult(
       context = new Context(copyGlobalContext(), bindings, renderConfig.getDisabled());
     }
 
-    try (
-      AutoCloseableImpl<JinjavaInterpreter> interpreterAutoCloseable = JinjavaInterpreter
-        .closeablePushCurrent(
-          globalConfig.getInterpreterFactory().newInstance(this, context, renderConfig)
-        )
-        .get()
-    ) {
-      JinjavaInterpreter interpreter = interpreterAutoCloseable.value();
+    try {
+      JinjavaInterpreter interpreter = globalConfig
+        .getInterpreterFactory()
+        .newInstance(this, context, renderConfig);
       try {
         String result = interpreter.render(template);
         return new RenderResult(