(1.4.x) Remove spring boot duplication in configuration (#800)

* Use SpringBootPlugin.BOM_COORDINATES to define Spring Boot dependencies version
This allows removing 'springBootVersion' so that the actual version can be
set only once in the boot plugin in 'settings.gradle'. This requires adding
the boot plugin to all modules, modules that do not use use 'apply false'
to only add the plugin libraries to the build runtime.
* Replace use of enforcePlarform with platform

build.gradle

@@ -26,7 +26,6 @@ buildscript {
 		immutablesVersion = "2.9.3"
 		openServiceBrokerVersion = "3.4.2"
 		pmdVersion = "6.29.0"
-		springBootVersion = "2.5.14"
 		springCredhubVersion = "2.2.0"
 		springFrameworkVersion = "5.3.18"
 		wiremockVersion = "2.27.2"
@@ -34,7 +33,7 @@ buildscript {
 }
 
 plugins {
-	id "io.spring.nohttp" version "0.0.11"
+	id 'io.spring.nohttp'
 	id 'distribution'
 	id 'jacoco'
 }

settings.gradle

@@ -1,3 +1,13 @@
+pluginManagement {
+	plugins {
+		id 'io.spring.nohttp' version "0.0.11"
+		id 'org.springframework.boot' version "2.5.14"
+	}
+	repositories {
+		gradlePluginPortal()
+	}
+}
+
 rootProject.name = "spring-cloud-app-broker"
 
 include "spring-cloud-app-broker-deployer"

spring-cloud-app-broker-acceptance-tests/build.gradle

@@ -14,14 +14,16 @@
  * limitations under the License.
  */
 
+import org.springframework.boot.gradle.plugin.SpringBootPlugin
+
 plugins {
-	id 'org.springframework.boot' version "2.5.14"
+	id 'org.springframework.boot'
 }
 
 description = "Spring Cloud App Broker Acceptance Tests"
 
 dependencies {
-	api enforcedPlatform("org.springframework.boot:spring-boot-dependencies:${springBootVersion}")
+	api platform(SpringBootPlugin.BOM_COORDINATES)
 	api project(":spring-cloud-starter-app-broker-cloudfoundry")
 	api "org.springframework.boot:spring-boot-starter-webflux"
 

spring-cloud-app-broker-autoconfigure/build.gradle

@@ -14,6 +14,12 @@
  * limitations under the License.
  */
 
+import org.springframework.boot.gradle.plugin.SpringBootPlugin
+
+plugins {
+	id 'org.springframework.boot' apply false
+}
+
 description = "Spring Cloud App Broker Autoconfiguration"
 
 java {
@@ -23,11 +29,11 @@ java {
 }
 
 dependencies {
-	annotationProcessor enforcedPlatform("org.springframework.boot:spring-boot-dependencies:${springBootVersion}")
+	annotationProcessor platform(SpringBootPlugin.BOM_COORDINATES)
 	annotationProcessor "org.springframework.boot:spring-boot-configuration-processor"
 	annotationProcessor "org.springframework.boot:spring-boot-autoconfigure-processor"
 
-	api enforcedPlatform("org.springframework.boot:spring-boot-dependencies:${springBootVersion}")
+	api platform(SpringBootPlugin.BOM_COORDINATES)
 	api project(":spring-cloud-app-broker-core")
 	api project(":spring-cloud-app-broker-deployer")
 	api project(":spring-cloud-app-broker-deployer-cloudfoundry")

spring-cloud-app-broker-core/build.gradle

@@ -14,13 +14,19 @@
  * limitations under the License.
  */
 
+import org.springframework.boot.gradle.plugin.SpringBootPlugin
+
+plugins {
+	id 'org.springframework.boot' apply false
+}
+
 description = "Spring Cloud App Broker Core"
 
 dependencies {
 	api project(":spring-cloud-app-broker-deployer")
 	api "org.springframework.cloud:spring-cloud-open-service-broker-core:${openServiceBrokerVersion}"
 
-	api enforcedPlatform("org.springframework.boot:spring-boot-dependencies:${springBootVersion}")
+	api platform(SpringBootPlugin.BOM_COORDINATES)
 	api "org.springframework:spring-core"
 	api "org.springframework:spring-context"
 	api "io.projectreactor:reactor-core"

spring-cloud-app-broker-deployer-cloudfoundry/build.gradle

@@ -14,10 +14,16 @@
  * limitations under the License.
  */
 
+import org.springframework.boot.gradle.plugin.SpringBootPlugin
+
+plugins {
+	id 'org.springframework.boot' apply false
+}
+
 description = "Spring Cloud App Broker Deployer Cloud Foundry"
 
 dependencies {
-	api enforcedPlatform("org.springframework.boot:spring-boot-dependencies:${springBootVersion}")
+	api platform(SpringBootPlugin.BOM_COORDINATES)
 	api project(":spring-cloud-app-broker-deployer")
 	api "org.cloudfoundry:cloudfoundry-client-reactor:${cfJavaClientVersion}"
 	api "org.cloudfoundry:cloudfoundry-operations:${cfJavaClientVersion}"

spring-cloud-app-broker-deployer/build.gradle

@@ -14,10 +14,16 @@
  * limitations under the License.
  */
 
+import org.springframework.boot.gradle.plugin.SpringBootPlugin
+
+plugins {
+	id 'org.springframework.boot' apply false
+}
+
 description = "Spring Cloud App Broker Deployer"
 
 dependencies {
-	api enforcedPlatform("org.springframework.boot:spring-boot-dependencies:${springBootVersion}")
+	api platform(SpringBootPlugin.BOM_COORDINATES)
 	api "org.springframework:spring-core"
 	api "io.projectreactor:reactor-core"
 

spring-cloud-app-broker-docs/build.gradle

@@ -14,7 +14,10 @@
  * limitations under the License.
  */
 
+import org.springframework.boot.gradle.plugin.SpringBootPlugin
+
 plugins {
+	id 'org.springframework.boot' apply false
 	id 'org.asciidoctor.jvm.pdf' version '3.3.2'
 	id 'org.asciidoctor.jvm.convert' version '3.3.2'
 }
@@ -26,7 +29,7 @@ configurations {
 }
 
 dependencies {
-	implementation enforcedPlatform("org.springframework.boot:spring-boot-dependencies:${springBootVersion}")
+	implementation platform(SpringBootPlugin.BOM_COORDINATES)
 	implementation project(":spring-cloud-app-broker-core")
 	implementation "org.springframework.boot:spring-boot-starter"
 	implementation "org.springframework.boot:spring-boot-starter-data-r2dbc"

spring-cloud-app-broker-integration-tests/build.gradle

@@ -13,15 +13,16 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+import org.springframework.boot.gradle.plugin.SpringBootPlugin
 
 plugins {
-	id 'org.springframework.boot' version "2.5.14"
+	id 'org.springframework.boot'
 }
 
 description = "Spring Cloud App Broker Integration Tests"
 
 dependencies {
-	implementation enforcedPlatform("org.springframework.boot:spring-boot-dependencies:${springBootVersion}")
+	implementation platform(SpringBootPlugin.BOM_COORDINATES)
 	implementation project(":spring-cloud-starter-app-broker-cloudfoundry")
 	implementation "org.springframework.boot:spring-boot-starter-webflux"
 

spring-cloud-app-broker-logging/build.gradle

@@ -14,10 +14,16 @@
  * limitations under the License.
  */
 
+import org.springframework.boot.gradle.plugin.SpringBootPlugin
+
+plugins {
+	id 'org.springframework.boot' apply false
+}
+
 description = "Spring Cloud App Broker Logging"
 
 dependencies {
-	api enforcedPlatform("org.springframework.boot:spring-boot-dependencies:${springBootVersion}")
+	api platform(SpringBootPlugin.BOM_COORDINATES)
     api "org.springframework.boot:spring-boot-starter-webflux"
     api "org.cloudfoundry:cloudfoundry-client-reactor:${cfJavaClientVersion}"
     api "org.cloudfoundry:cloudfoundry-operations:${cfJavaClientVersion}"

spring-cloud-app-broker-security-credhub/build.gradle

@@ -14,10 +14,16 @@
  * limitations under the License.
  */
 
+import org.springframework.boot.gradle.plugin.SpringBootPlugin
+
+plugins {
+	id 'org.springframework.boot' apply false
+}
+
 description = "Spring Cloud App Broker Security CredHub"
 
 dependencies {
-	api enforcedPlatform("org.springframework.boot:spring-boot-dependencies:${springBootVersion}")
+	api platform(SpringBootPlugin.BOM_COORDINATES)
 	api project(":spring-cloud-app-broker-core")
 	api "org.springframework.credhub:spring-credhub-starter:${springCredhubVersion}"
 	api "org.springframework.cloud:spring-cloud-open-service-broker-core:${openServiceBrokerVersion}"