Revisit Gradle repositories configuration

samples/webflux-security/build.gradle

@@ -8,6 +8,12 @@ sourceCompatibility = '1.8'
 
 ext['spring-graphql.version'] = version
 
+repositories {
+	mavenCentral()
+	maven { url 'https://repo.spring.io/milestone' }
+	maven { url 'https://repo.spring.io/snapshot' }
+}
+
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-graphql'
 	implementation 'org.springframework.boot:spring-boot-starter-webflux'
@@ -20,4 +26,4 @@ dependencies {
 }
 test {
 	useJUnitPlatform()
-}
+}

samples/webflux-websocket/build.gradle

@@ -8,6 +8,12 @@ sourceCompatibility = '1.8'
 
 ext['spring-graphql.version'] = version
 
+repositories {
+	mavenCentral()
+	maven { url 'https://repo.spring.io/milestone' }
+	maven { url 'https://repo.spring.io/snapshot' }
+}
+
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-graphql'
 	implementation 'org.springframework.boot:spring-boot-starter-webflux'

samples/webmvc-http-security/build.gradle

@@ -8,6 +8,12 @@ sourceCompatibility = '1.8'
 
 ext['spring-graphql.version'] = version
 
+repositories {
+	mavenCentral()
+	maven { url 'https://repo.spring.io/milestone' }
+	maven { url 'https://repo.spring.io/snapshot' }
+}
+
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-graphql'
 	implementation 'org.springframework.boot:spring-boot-starter-web'

samples/webmvc-http/build.gradle

@@ -8,6 +8,12 @@ sourceCompatibility = '1.8'
 
 ext['spring-graphql.version'] = version
 
+repositories {
+	mavenCentral()
+	maven { url 'https://repo.spring.io/milestone' }
+	maven { url 'https://repo.spring.io/snapshot' }
+}
+
 dependencies {
 	implementation 'org.springframework.boot:spring-boot-starter-graphql'
 	implementation 'org.springframework.boot:spring-boot-starter-web'

settings.gradle

@@ -1,10 +1,14 @@
 pluginManagement {
-    repositories {
-        maven { url 'https://repo.spring.io/release' }
-        maven { url 'https://repo.spring.io/milestone' }
-        maven { url 'https://repo.spring.io/snapshot' }
-        gradlePluginPortal()
-    }
+	repositories {
+		mavenCentral()
+		gradlePluginPortal()
+		maven {
+			url 'https://repo.spring.io/release'
+		}
+		if (version.endsWith('-SNAPSHOT')) {
+			maven { url "https://repo.spring.io/snapshot" }
+		}
+	}
     resolutionStrategy {
         eachPlugin {
             if (requested.id.id == 'org.springframework.boot') {