Implement CelEnvironmentExporter.

This exporter infers from a concrete Cel instance all the parameters to reconstruct a CelEnvironment.

The exporter functionality is not complete yet, please don't start using it yet.

PiperOrigin-RevId: 786058908

Author: dmitriplotnikov

bundle/BUILD.bazel

@@ -24,3 +24,9 @@ java_library(
     name = "environment_yaml_parser",
     exports = ["//bundle/src/main/java/dev/cel/bundle:environment_yaml_parser"],
 )
+
+java_library(
+    name = "environment_exporter",
+    visibility = ["//:internal"],
+    exports = ["//bundle/src/main/java/dev/cel/bundle:environment_exporter"],
+)

bundle/src/main/java/dev/cel/bundle/BUILD.bazel

@@ -111,6 +111,32 @@ java_library(
     ],
 )
 
+java_library(
+    name = "environment_exporter",
+    srcs = [
+        "CelEnvironmentExporter.java",
+    ],
+    tags = [
+    ],
+    deps = [
+        ":environment",
+        "//:auto_value",
+        "//bundle:cel",
+        "//checker:standard_decl",
+        "//common:compiler_common",
+        "//common:options",
+        "//common/internal:env_visitor",
+        "//common/types:cel_proto_types",
+        "//common/types:cel_types",
+        "//common/types:type_providers",
+        "//extensions",
+        "//extensions:extension_library",
+        "@cel_spec//proto/cel/expr:checked_java_proto",
+        "@maven//:com_google_errorprone_error_prone_annotations",
+        "@maven//:com_google_guava_guava",
+    ],
+)
+
 java_library(
     name = "required_fields_checker",
     srcs = [

bundle/src/main/java/dev/cel/bundle/CelEnvironment.java

@@ -185,7 +185,7 @@ public static Builder newBuilder() {
         .setVariables(ImmutableSet.of())
         .setFunctions(ImmutableSet.of());
   }
-  
+
   /** Extends the provided {@link CelCompiler} environment with this configuration. */
   public CelCompiler extend(CelCompiler celCompiler, CelOptions celOptions)
       throws CelEnvironmentException {