Pass environment paths into entitlement bootstrap (elastic#121347) (elastic#121398)

This commit adds the data dirs, config dir and temp dir into
entitlement bootstrapping. It doesn't yet use them in entitlement
policies, but makes them available to use within initialization.

Author: rjernst

libs/entitlement/src/main/java/org/elasticsearch/entitlement/bootstrap/EntitlementBootstrap.java

@@ -31,10 +31,22 @@
 
 public class EntitlementBootstrap {
 
-    public record BootstrapArgs(Map<String, Policy> pluginPolicies, Function<Class<?>, String> pluginResolver) {
+    public record BootstrapArgs(
+        Map<String, Policy> pluginPolicies,
+        Function<Class<?>, String> pluginResolver,
+        Path[] dataDirs,
+        Path configDir,
+        Path tempDir
+    ) {
         public BootstrapArgs {
             requireNonNull(pluginPolicies);
             requireNonNull(pluginResolver);
+            requireNonNull(dataDirs);
+            if (dataDirs.length == 0) {
+                throw new IllegalArgumentException("must provide at least one data directory");
+            }
+            requireNonNull(configDir);
+            requireNonNull(tempDir);
         }
     }
 
@@ -50,13 +62,22 @@ public static BootstrapArgs bootstrapArgs() {
      *
      * @param pluginPolicies a map holding policies for plugins (and modules), by plugin (or module) name.
      * @param pluginResolver a functor to map a Java Class to the plugin it belongs to (the plugin name).
+     * @param dataDirs data directories for Elasticsearch
+     * @param configDir the config directory for Elasticsearch
+     * @param tempDir the temp directory for Elasticsearch
      */
-    public static void bootstrap(Map<String, Policy> pluginPolicies, Function<Class<?>, String> pluginResolver) {
+    public static void bootstrap(
+        Map<String, Policy> pluginPolicies,
+        Function<Class<?>, String> pluginResolver,
+        Path[] dataDirs,
+        Path configDir,
+        Path tempDir
+    ) {
         logger.debug("Loading entitlement agent");
         if (EntitlementBootstrap.bootstrapArgs != null) {
             throw new IllegalStateException("plugin data is already set");
         }
-        EntitlementBootstrap.bootstrapArgs = new BootstrapArgs(pluginPolicies, pluginResolver);
+        EntitlementBootstrap.bootstrapArgs = new BootstrapArgs(pluginPolicies, pluginResolver, dataDirs, configDir, tempDir);
         exportInitializationToAgent();
         loadAgent(findAgentJar());
         selfTest();

server/src/main/java/org/elasticsearch/bootstrap/Elasticsearch.java

@@ -236,7 +236,13 @@ private static void initPhase2(Bootstrap bootstrap) throws IOException {
             pluginsLoader = PluginsLoader.createPluginsLoader(modulesBundles, pluginsBundles, findPluginsWithNativeAccess(pluginPolicies));
 
             var pluginsResolver = PluginsResolver.create(pluginsLoader);
-            EntitlementBootstrap.bootstrap(pluginPolicies, pluginsResolver::resolveClassToPluginName);
+            EntitlementBootstrap.bootstrap(
+                pluginPolicies,
+                pluginsResolver::resolveClassToPluginName,
+                nodeEnv.dataFiles(),
+                nodeEnv.configFile(),
+                nodeEnv.tmpFile()
+            );
         } else if (RuntimeVersionFeature.isSecurityManagerAvailable()) {
             // no need to explicitly enable native access for legacy code
             pluginsLoader = PluginsLoader.createPluginsLoader(modulesBundles, pluginsBundles, Map.of());