add customFields to InitializrConfiguration

initializr-metadata/src/main/java/io/spring/initializr/metadata/InitializrConfiguration.java

@@ -59,6 +59,25 @@ public void validate() {
 		this.env.validate();
 	}
 
+	/**
+	 * The customFields feature in Spring Initializr enables additional, adaptable
+	 * metadata beyond the standard fields. This allows organizations to set
+	 * environment-specific values like default configurations, dependencies, version
+	 * control, or deployment options—aligning generated projects directly with their
+	 * standards. By using customFields, organizations can add new metadata flexibly
+	 * without altering core configurations, making Initializr more adaptable and valuable
+	 * for various use cases.
+	 */
+	private Map<String, Object> customFields = Collections.emptyMap();
+
+	public Map<String, Object> getCustomFields() {
+		return this.customFields;
+	}
+
+	public void setCustomFields(Map<String, Object> customFields) {
+		this.customFields = customFields;
+	}
+
 	public void merge(InitializrConfiguration other) {
 		this.env.merge(other.env);
 	}

initializr-web/src/test/java/io/spring/initializr/web/controller/ProjectMetadataControllerCustomFieldsIntegrationTests.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2012-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.spring.initializr.web.controller;
+
+import io.spring.initializr.web.AbstractFullStackInitializrIntegrationTests;
+import org.json.JSONException;
+import org.json.JSONObject;
+import org.junit.jupiter.api.Test;
+import org.skyscreamer.jsonassert.JSONAssert;
+import org.skyscreamer.jsonassert.JSONCompareMode;
+
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.ActiveProfiles;
+
+/**
+ * Integration tests for {@link ProjectMetadataController} on a real http server.
+ *
+ * @author Joar Varpe
+ */
+@ActiveProfiles("test-custom-fields")
+class ProjectMetadataControllerCustomFieldsIntegrationTests extends AbstractFullStackInitializrIntegrationTests {
+
+	@Test
+	void validateJson() throws JSONException {
+		ResponseEntity<String> response = execute("/metadata/config", String.class, null, "application/json");
+		validateContentType(response, MediaType.APPLICATION_JSON);
+		JSONObject json = new JSONObject(response.getBody());
+		JSONObject expected = readJsonFrom("metadata/config/test-custom-fields.json");
+		JSONAssert.assertEquals(expected, json, JSONCompareMode.STRICT);
+	}
+
+}

initializr-web/src/test/resources/application-test-custom-fields.yml

@@ -0,0 +1,173 @@
+info:
+  spring-boot:
+    version: 2.4.4
+
+initializr:
+  customFields:
+    exampleField1: "Example String Value"
+    exampleField2: 123
+    exampleField3: true
+    nestedField:
+      nestedKey1: "Nested value"
+      nestedKey2: 42
+  env:
+    boms:
+      my-api-bom:
+        groupId: org.acme
+        artifactId: my-api-bom
+        versionProperty: my-api.version
+        additionalBoms: ['my-api-dependencies-bom']
+        mappings:
+          - compatibilityRange: "[2.3.0.RELEASE,2.4.6)"
+            version: 1.0.0.RELEASE
+            repositories: my-api-repo-1
+          - compatibilityRange: "2.4.6"
+            version: 2.0.0.RELEASE
+            repositories: my-api-repo-2
+      my-api-dependencies-bom:
+        groupId: org.acme
+        artifactId: my-api-dependencies-bom
+        version: 1.0.0.RELEASE
+        repositories: my-api-repo-3
+    kotlin:
+      defaultVersion: 1.5
+      mappings:
+        - compatibilityRange: "[2.3.0.RELEASE,2.4.0-M1)"
+          version: 1.3.72
+        - compatibilityRange: "[2.4.0-M1,2.5.0-M1)"
+          version: 1.4.31
+    repositories:
+      my-api-repo-1:
+        name: repo1
+        url: https://example.com/repo1
+      my-api-repo-2:
+        name: repo2
+        url: https://example.com/repo2
+      my-api-repo-3:
+        name: repo3
+        url: https://example.com/repo3
+  dependencies:
+    - name: Core
+      content:
+        - name: Web
+          id: web
+          description: Web dependency description
+          facets:
+            - web
+          links:
+            - rel: guide
+              href: https://example.com/guide
+              description: Building a RESTful Web Service
+            - rel: reference
+              href: https://example.com/doc
+        - name: Security
+          id: security
+        - name: Data JPA
+          id: data-jpa
+          aliases:
+            - jpa
+    - name: Other
+      content:
+        - name: Foo
+          groupId: org.acme
+          artifactId: foo
+          version: 1.3.5
+          weight: 42
+          keywords:
+            - thefoo
+            - dafoo
+          links:
+            - rel: guide
+              href: https://example.com/guide1
+            - rel: reference
+              href: https://example.com/{bootVersion}/doc
+            - rel: guide
+              href: https://example.com/guide2
+              description: Some guide for foo
+        - name: Bar
+          id: org.acme:bar
+          version: 2.1.0
+        - name: Biz
+          groupId: org.acme
+          artifactId: biz
+          scope: runtime
+          version: 1.3.5
+          compatibilityRange: 2.6.0-SNAPSHOT
+        - name: Bur
+          id: org.acme:bur
+          version: 2.1.0
+          scope: test
+          compatibilityRange: "[2.4.4,2.5.0-SNAPSHOT)"
+        - name: My API
+          id : my-api
+          groupId: org.acme
+          artifactId: my-api
+          scope: provided
+          bom: my-api-bom
+  types:
+    - name: Maven POM
+      id: maven-build
+      tags:
+        build: maven
+        format: build
+      default: false
+      action: /pom.xml
+    - name: Maven Project
+      id: maven-project
+      tags:
+        build: maven
+        format: project
+      default: true
+      action: /starter.zip
+    - name: Gradle Config
+      id: gradle-build
+      tags:
+        build: gradle
+        format: build
+      default: false
+      action: /build.gradle
+    - name: Gradle Project
+      id: gradle-project
+      tags:
+        build: gradle
+        format: project
+      default: false
+      action: /starter.zip
+  packagings:
+    - name: Jar
+      id: jar
+      default: true
+    - name: War
+      id: war
+      default: false
+  javaVersions:
+    - id: 1.6
+      default: false
+    - id: 1.7
+      default: false
+    - id: 1.8
+      default: true
+  languages:
+    - name: Groovy
+      id: groovy
+      default: false
+    - name: Java
+      id: java
+      default: true
+    - name: Kotlin
+      id: kotlin
+      default: false
+  bootVersions:
+    - name : Latest SNAPSHOT
+      id: 2.5.0-SNAPSHOT
+      default: false
+    - name: 2.4.4
+      id: 2.4.4
+      default: true
+    - name: 2.3.10
+      id: 2.3.10.RELEASE
+      default: false
+
+server:
+  error:
+    include-message: always