Add dependency management for gRPC libraries

Closes gh-49670

buildSrc/src/main/java/org/springframework/boot/build/bom/BomExtension.java

@@ -93,6 +93,13 @@ public class BomExtension {
 		return this.libraries;
 	}
 
+	public Library getLibrary(String name) {
+		return getLibraries().stream()
+			.filter((library) -> library.getName().equals(name))
+			.findFirst()
+			.orElseThrow(() -> new IllegalStateException("No library found named '%s'".formatted(name)));
+	}
+
 	public void upgrade(Action<UpgradeHandler> action) {
 		action.execute(this.upgradeHandler);
 	}

buildSrc/src/main/java/org/springframework/boot/build/context/properties/DocumentConfigurationProperties.java

@@ -63,6 +63,7 @@ public abstract class DocumentConfigurationProperties extends DefaultTask {
 		Snippets snippets = new Snippets(this.configurationPropertyMetadata, getDeprecated().getOrElse(false));
 		snippets.add("application-properties.core", "Core Properties", this::corePrefixes);
 		snippets.add("application-properties.cache", "Cache Properties", this::cachePrefixes);
+		snippets.add("application-properties.grpc", "gRPC Properties", this::grpcPrefixes);
 		snippets.add("application-properties.mail", "Mail Properties", this::mailPrefixes);
 		snippets.add("application-properties.json", "JSON Properties", this::jsonPrefixes);
 		snippets.add("application-properties.data", "Data Properties", this::dataPrefixes);
@@ -115,6 +116,10 @@ public abstract class DocumentConfigurationProperties extends DefaultTask {
 		config.accept("spring.cache");
 	}
 
+	private void grpcPrefixes(Config prefix) {
+		prefix.accept("spring.grpc");
+	}
+
 	private void mailPrefixes(Config config) {
 		config.accept("spring.mail");
 		config.accept("spring.sendgrid");

gradle.properties

@@ -24,5 +24,6 @@ snakeYamlVersion=2.6
 springFrameworkVersion=7.0.6
 springFramework60xVersion=6.0.23
 tomcatVersion=11.0.18
+protobufGradlePluginVersion=0.9.6
 
 kotlin.stdlib.default.dependency=false

platform/spring-boot-dependencies/build.gradle

@@ -562,6 +562,30 @@ bom {
 			site("https://groovy-lang.org")
 		}
 	}
+	library("Grpc Java", "1.78.0") {
+		group("io.grpc") {
+			bom("grpc-bom")
+		}
+		links {
+			github("https://github.com/grpc/grpc-java")
+			docs("https://grpc.io/docs/languages/java/")
+			releaseNotes("https://github.com/grpc/grpc-java/releases/tag/v{version}")
+		}
+	}
+	library("Grpc Kotlin", "1.5.0") {
+		group("io.grpc") {
+			modules = [
+					"grpc-kotlin-stub" {
+						exclude group: "javax.annotation", module: "javax.annotation-api"
+					}
+			]
+		}
+		links {
+			github("https://github.com/grpc/grpc-kotlin")
+			docs("https://grpc.io/docs/languages/kotlin/")
+			releaseNotes("https://github.com/grpc/grpc-kotlin/releases/tag/v{version}")
+		}
+	}
 	library("Gson", "2.13.2") {
 		group("com.google.code.gson") {
 			modules = [
@@ -1883,6 +1907,27 @@ bom {
 			releaseNotes("https://qpid.apache.org/releases/qpid-protonj2-{version}/release-notes.html")
 		}
 	}
+	library("Protobuf Common Protos", "2.65.0") {
+		group("com.google.api.grpc") {
+			modules = [
+				"proto-google-common-protos"
+			]
+		}
+		links {
+			github("https://github.com/googleapis/sdk-platform-java")
+			releaseNotes("https://github.com/googleapis/sdk-platform-java/releases/tag/v-{version}")
+		}
+	}
+	library("Protobuf Java", "4.34.0") {
+		group("com.google.protobuf") {
+			bom("protobuf-bom")
+		}
+		links {
+			site("https://protobuf.dev")
+			github("https://github.com/protocolbuffers/protobuf")
+			releaseNotes("https://github.com/protocolbuffers/protobuf/releases/tag/v{version}")
+		}
+	}
 	library("Quartz", "2.5.2") {
 		group("org.quartz-scheduler") {
 			modules = [
@@ -2525,6 +2570,23 @@ bom {
 			releaseNotes("https://github.com/spring-projects/spring-graphql/releases/tag/v{version}")
 		}
 	}
+	library("Spring gRPC", "1.1.0-SNAPSHOT") {
+		considerSnapshots()
+		group("org.springframework.grpc") {
+			modules = [
+					"spring-grpc-core"
+			]
+		}
+		links {
+			site("https://spring.io/projects/spring-grpc")
+			github("https://github.com/spring-projects/spring-grpc")
+			javadoc(version -> "https://docs.spring.io/spring-grpc/docs/%s/api"
+					.formatted(version.forMajorMinorGeneration()), "org.springframework.grpc")
+			docs(version -> "https://docs.spring.io/spring-grpc/docs/%s/reference"
+					.formatted(version.forMajorMinorGeneration()))
+			releaseNotes("https://github.com/spring-projects/spring-grpc/releases/tag/v{version}")
+		}
+	}
 	library("Spring HATEOAS", "3.1.0-M1") {
 		considerSnapshots()
 		group("org.springframework.hateoas") {

platform/spring-boot-internal-dependencies/build.gradle

@@ -94,11 +94,6 @@ bom {
 			]
 		}
 	}
-	library("gRPC", "1.73.0") {
-		group("io.grpc") {
-			bom("grpc-bom")
-		}
-	}
 	library("Janino", "3.1.12") {
 		group("org.codehaus.janino") {
 			bom("janino") {