Use assignment to set url in Groovy Gradle builds

See gh-1656

Signed-off-by: Henning Pöttker <25299532+hpoettker@users.noreply.github.com>

Author: hpoettker

initializr-generator-spring/src/test/resources/project/gradle/repositories-build.gradle.gen

@@ -15,8 +15,8 @@ java {
 
 repositories {
 	mavenCentral()
-	maven { url 'https://example.com/foo' }
-	maven { url 'https://example.com/bar' }
+	maven { url = 'https://example.com/foo' }
+	maven { url = 'https://example.com/bar' }
 }
 
 dependencies {

initializr-generator-spring/src/test/resources/project/gradle/repositories-milestone-build.gradle.gen

@@ -15,7 +15,7 @@ java {
 
 repositories {
 	mavenCentral()
-	maven { url 'https://repo.spring.io/milestone' }
+	maven { url = 'https://repo.spring.io/milestone' }
 }
 
 dependencies {

initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/gradle/GroovyDslGradleBuildWriter.java

@@ -92,7 +92,7 @@ protected String repositoryAsString(MavenRepository repository) {
 		if (MavenRepository.MAVEN_CENTRAL.equals(repository)) {
 			return "mavenCentral()";
 		}
-		return "maven { url '" + repository.getUrl() + "' }";
+		return "maven { url = '" + repository.getUrl() + "' }";
 	}
 
 	@Override

initializr-generator/src/main/java/io/spring/initializr/generator/buildsystem/gradle/GroovyDslGradleSettingsWriter.java

@@ -30,7 +30,7 @@ protected String wrapWithQuotes(String value) {
 
 	@Override
 	protected String urlAssignment(String url) {
-		return "url " + wrapWithQuotes(url);
+		return "url = " + wrapWithQuotes(url);
 	}
 
 }

initializr-generator/src/test/java/io/spring/initializr/generator/buildsystem/gradle/GroovyDslGradleBuildWriterTests.java

@@ -133,7 +133,7 @@ void gradleBuildWithRepository() {
 		build.repositories().add(MavenRepository.withIdAndUrl("spring-milestones", "https://repo.spring.io/milestone"));
 		assertThat(write(build)).contains("""
 				repositories {
-					maven { url 'https://repo.spring.io/milestone' }
+					maven { url = 'https://repo.spring.io/milestone' }
 				}""");
 	}
 
@@ -144,7 +144,7 @@ void gradleBuildWithSnapshotRepository() {
 			.add(MavenRepository.withIdAndUrl("spring-snapshots", "https://repo.spring.io/snapshot").onlySnapshots());
 		assertThat(write(build)).contains("""
 				repositories {
-					maven { url 'https://repo.spring.io/snapshot' }
+					maven { url = 'https://repo.spring.io/snapshot' }
 				}""");
 	}
 

initializr-generator/src/test/java/io/spring/initializr/generator/buildsystem/gradle/GroovyDslGradleSettingsWriterTests.java

@@ -63,7 +63,7 @@ void gradleBuildWithPluginRepository() {
 		assertThat(generateSettings(build)).contains("""
 				pluginManagement {
 					repositories {
-						maven { url 'https://repo.spring.io/milestone' }
+						maven { url = 'https://repo.spring.io/milestone' }
 						gradlePluginPortal()
 					}
 				}""");
@@ -79,7 +79,7 @@ void gradleBuildWithSnapshotPluginRepository() {
 		assertThat(generateSettings(build)).contains("""
 				pluginManagement {
 					repositories {
-						maven { url 'https://repo.spring.io/snapshot' }
+						maven { url = 'https://repo.spring.io/snapshot' }
 						gradlePluginPortal()
 					}
 				}""");