Support Git-style searchPaths with wildcards in AWS S3 buckets (#2812)

docs/modules/ROOT/pages/server/environment-repository/aws-s3-backend.adoc

@@ -67,3 +67,31 @@ The preceding listing matches objects stored in your bucket in `/\{application}`
 │   ├── application-test.yml
 │   └── application.yml
 ```
+
+[[search-paths]]
+== Search paths
+
+Spring Cloud Config Server also supports `search-paths` for the AWS S3 backend, analogous to xref:./git-backend.adoc#placeholders-in-git-search-paths[`search-paths`] in the Git backend. You can specify a list of paths in the bucket to search for configuration files. The search paths can contain placeholders like `{application}`, `{profile}`, and `{label}`.
+
+The search paths support:
+- *Literal paths*: Probing exact paths with supported file extensions (e.g. `properties`, `json`, `yml`, `yaml`).
+- *Directory paths*: Scanning files under a specific directory.
+- *Wildcards*: Patterns with `*` or `?` placeholders (e.g. `config/*`).
+
+The following configuration specifies search paths in the S3 bucket:
+
+[source,yaml]
+----
+spring:
+  cloud:
+    config:
+      server:
+        awss3:
+          region: us-east-1
+          bucket: bucket1
+          search-paths:
+            - '{application}'
+            - 'config/{application}'
+            - 'settings/*'
+----
+

spring-cloud-config-server/src/main/java/org/springframework/cloud/config/server/environment/AwsS3EnvironmentProperties.java

@@ -16,11 +16,15 @@
 
 package org.springframework.cloud.config.server.environment;
 
+import java.util.Collections;
+import java.util.List;
+
 import org.springframework.boot.context.properties.ConfigurationProperties;
 import org.springframework.cloud.config.server.support.EnvironmentRepositoryProperties;
 
 /**
  * @author Clay McCoy
+ * @author Geonwook Ham
  */
 @ConfigurationProperties("spring.cloud.config.server.awss3")
 public class AwsS3EnvironmentProperties implements EnvironmentRepositoryProperties {
@@ -41,13 +45,28 @@ public class AwsS3EnvironmentProperties implements EnvironmentRepositoryProperti
 	private String bucket;
 
 	/**
-	 * Use application name as intermediate directory. Analogous to `searchPaths:
-	 * {application}` from Git backend.
+	 * Use application name as intermediate directory. Analogous to
+	 * {@link #searchPaths}
+	 * from Git backend.
 	 */
 	private boolean useDirectoryLayout;
 
 	private int order = DEFAULT_ORDER;
 
+	/**
+	 * List of directory paths to search for profiles in the bucket.
+	 * Analogous to {@link #searchPaths} in Git backend.
+	 */
+	private List<String> searchPaths = Collections.emptyList();
+
+	public List<String> getSearchPaths() {
+		return searchPaths;
+	}
+
+	public void setSearchPaths(List<String> searchPaths) {
+		this.searchPaths = searchPaths;
+	}
+
 	public String getRegion() {
 		return region;
 	}