From eb43facd4d83aa289d2ccfeff0a3929be30e683b Mon Sep 17 00:00:00 2001
From: Liam Miller-Cushon <cushon@google.com>
Date: Mon, 1 Dec 2025 00:57:00 -0800
Subject: [PATCH] Create a FormattingFiler factory that disables formatting
 during header compilation

PiperOrigin-RevId: 838646724
---
 .../java/filer/FormattingFiler.java           | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/core/src/main/java/com/google/googlejavaformat/java/filer/FormattingFiler.java b/core/src/main/java/com/google/googlejavaformat/java/filer/FormattingFiler.java
index 2f2e33cbe..f5cc7fd09 100644
--- a/core/src/main/java/com/google/googlejavaformat/java/filer/FormattingFiler.java
+++ b/core/src/main/java/com/google/googlejavaformat/java/filer/FormattingFiler.java
@@ -20,6 +20,7 @@
 import java.io.IOException;
 import javax.annotation.processing.Filer;
 import javax.annotation.processing.Messager;
+import javax.annotation.processing.ProcessingEnvironment;
 import javax.lang.model.element.Element;
 import javax.tools.FileObject;
 import javax.tools.JavaFileManager;
@@ -38,8 +39,25 @@ public final class FormattingFiler implements Filer {
   private final Messager messager;
 
   /**
+   * Create a new {@link FormattingFiler}.
+   *
+   * @param processingEnv the processing environment
+   */
+  public static Filer create(ProcessingEnvironment processingEnv) {
+    Filer delegate = processingEnv.getFiler();
+    if (processingEnv.getOptions().containsKey("experimental_turbine_hjar")) {
+      return delegate;
+    }
+    return new FormattingFiler(delegate, processingEnv.getMessager());
+  }
+
+  /**
+   * Create a new {@link FormattingFiler}.
+   *
    * @param delegate filer to decorate
+   * @deprecated prefer {@link #create(ProcessingEnvironment)}
    */
+  @Deprecated
   public FormattingFiler(Filer delegate) {
     this(delegate, null);
   }
@@ -50,7 +68,9 @@ public FormattingFiler(Filer delegate) {
    *
    * @param delegate filer to decorate
    * @param messager to log warnings to
+   * @deprecated prefer {@link #create(ProcessingEnvironment)}
    */
+  @Deprecated
   public FormattingFiler(Filer delegate, @Nullable Messager messager) {
     this.delegate = checkNotNull(delegate);
     this.messager = messager;