From ef6b6169f80d14c35775a04daf9f375bd82ce2d4 Mon Sep 17 00:00:00 2001
From: Jihun Cho <jihuncho@google.com>
Date: Fri, 1 Feb 2019 14:00:05 -0800
Subject: [PATCH] Adding Bom (#5209)

---
 bom/build.gradle               | 27 +++++++++++++++++++++++++++
 build.gradle                   |  3 ++-
 examples/example-gauth/pom.xml | 22 +++++++++++++++-------
 examples/example-tls/pom.xml   | 18 +++++++++++++++---
 examples/pom.xml               | 20 +++++++++++++++-----
 settings.gradle                |  2 ++
 6 files changed, 76 insertions(+), 16 deletions(-)
 create mode 100644 bom/build.gradle

diff --git a/bom/build.gradle b/bom/build.gradle
new file mode 100644
index 0000000000..f074daea95
--- /dev/null
+++ b/bom/build.gradle
@@ -0,0 +1,27 @@
+description = 'gRPC: BOM'
+
+publishing {
+    publications {
+        maven(MavenPublication) {
+            // remove all other artifacts since BOM doesn't generates any Jar
+            artifacts = []
+
+            pom.withXml {
+                // Generate bom using subprojects
+                def internalProjects = [project.name, 'grpc-xds', 'grpc-gae-interop-testing-jdk8']
+
+                def dependencyManagement = asNode().appendNode('dependencyManagement')
+                def dependencies = dependencyManagement.appendNode('dependencies')
+                rootProject.subprojects.each { subproject ->
+                    if (internalProjects.contains(subproject.name)) {
+		        return
+		    }
+                    def dependencyNode = dependencies.appendNode('dependency')
+                    dependencyNode.appendNode('groupId', subproject.group)
+                    dependencyNode.appendNode('artifactId', subproject.name)
+                    dependencyNode.appendNode('version', subproject.version)
+                }
+	    }
+        }
+    }
+}
diff --git a/build.gradle b/build.gradle
index c4848bbca9..f1f03bebbe 100644
--- a/build.gradle
+++ b/build.gradle
@@ -447,9 +447,10 @@ subprojects {
 // Run with: ./gradlew japicmp --continue
 def baselineGrpcVersion = '1.6.1'
 def publicApiSubprojects = [
-    // TODO: uncomment after grpc-alts artifact is published.
+    // TODO: uncomment after grpc-alts, grpc-bom artifact is published.
     // ':grpc-alts',
     ':grpc-auth',
+    //':grpc-bom',
     ':grpc-context',
     ':grpc-core',
     ':grpc-grpclb',
diff --git a/examples/example-gauth/pom.xml b/examples/example-gauth/pom.xml
index d7dd791b16..56cefc29f7 100644
--- a/examples/example-gauth/pom.xml
+++ b/examples/example-gauth/pom.xml
@@ -9,37 +9,45 @@
   <version>1.19.0-SNAPSHOT</version><!-- CURRENT_GRPC_VERSION -->
   <name>example-gauth</name>
   <url>https://github.com/grpc/grpc-java</url>
+
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <grpc.version>1.19.0-SNAPSHOT</grpc.version><!-- CURRENT_GRPC_VERSION -->
-    <protoc.version>3.5.1-1</protoc.version>
     <protobuf.version>3.5.1</protobuf.version>
-    <netty.tcnative.version>2.0.20.Final</netty.tcnative.version>
     <!-- required for jdk9 -->
     <maven.compiler.source>1.7</maven.compiler.source>
     <maven.compiler.target>1.7</maven.compiler.target>
   </properties>
+
+  <dependencyManagement>
+    <dependencies>
+      <dependency>
+        <groupId>io.grpc</groupId>
+        <artifactId>grpc-bom</artifactId>
+        <version>${grpc.version}</version>
+        <type>pom</type>
+        <scope>import</scope>
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
+
   <dependencies>
     <dependency>
       <groupId>io.grpc</groupId>
       <artifactId>grpc-netty-shaded</artifactId>
-      <version>${grpc.version}</version>
       <scope>runtime</scope>
     </dependency>
     <dependency>
       <groupId>io.grpc</groupId>
       <artifactId>grpc-protobuf</artifactId>
-      <version>${grpc.version}</version>
     </dependency>
     <dependency>
       <groupId>io.grpc</groupId>
       <artifactId>grpc-stub</artifactId>
-      <version>${grpc.version}</version>
     </dependency>
     <dependency>
       <groupId>io.grpc</groupId>
       <artifactId>grpc-auth</artifactId>
-      <version>${grpc.version}</version>
     </dependency>
     <dependency>
       <groupId>javax.annotation</groupId>
@@ -50,7 +58,6 @@
     <dependency>
       <groupId>io.grpc</groupId>
       <artifactId>grpc-testing</artifactId>
-      <version>${grpc.version}</version>
       <scope>test</scope>
     </dependency>
     <dependency>
@@ -81,6 +88,7 @@
       <scope>test</scope>
     </dependency>
   </dependencies>
+
   <build>
     <extensions>
       <extension>
diff --git a/examples/example-tls/pom.xml b/examples/example-tls/pom.xml
index 021c4fba5c..d77818d3e5 100644
--- a/examples/example-tls/pom.xml
+++ b/examples/example-tls/pom.xml
@@ -9,6 +9,7 @@
   <version>1.19.0-SNAPSHOT</version><!-- CURRENT_GRPC_VERSION -->
   <name>example-tls</name>
   <url>https://github.com/grpc/grpc-java</url>
+
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <grpc.version>1.19.0-SNAPSHOT</grpc.version><!-- CURRENT_GRPC_VERSION -->
@@ -18,16 +19,27 @@
     <maven.compiler.source>1.7</maven.compiler.source>
     <maven.compiler.target>1.7</maven.compiler.target>
   </properties>
+
+  <dependencyManagement>
+    <dependencies>
+      <dependency>
+        <groupId>io.grpc</groupId>
+        <artifactId>grpc-bom</artifactId>
+        <version>${grpc.version}</version>
+        <type>pom</type>
+        <scope>import</scope>
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
+
   <dependencies>
     <dependency>
       <groupId>io.grpc</groupId>
       <artifactId>grpc-protobuf</artifactId>
-      <version>${grpc.version}</version>
     </dependency>
     <dependency>
       <groupId>io.grpc</groupId>
       <artifactId>grpc-stub</artifactId>
-      <version>${grpc.version}</version>
     </dependency>
     <dependency>
       <groupId>javax.annotation</groupId>
@@ -38,7 +50,6 @@
     <dependency>
       <groupId>io.grpc</groupId>
       <artifactId>grpc-netty</artifactId>
-      <version>${grpc.version}</version>
     </dependency>
     <dependency>
       <groupId>io.netty</groupId>
@@ -47,6 +58,7 @@
       <scope>runtime</scope>
     </dependency>
   </dependencies>
+
   <build>
     <extensions>
       <extension>
diff --git a/examples/pom.xml b/examples/pom.xml
index 423794d8ff..67eac6f9f5 100644
--- a/examples/pom.xml
+++ b/examples/pom.xml
@@ -9,32 +9,42 @@
   <version>1.19.0-SNAPSHOT</version><!-- CURRENT_GRPC_VERSION -->
   <name>examples</name>
   <url>https://github.com/grpc/grpc-java</url>
+
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <grpc.version>1.19.0-SNAPSHOT</grpc.version><!-- CURRENT_GRPC_VERSION -->
     <protobuf.version>3.5.1</protobuf.version>
     <protoc.version>3.5.1-1</protoc.version>
-    <netty.tcnative.version>2.0.7.Final</netty.tcnative.version>
     <!-- required for jdk9 -->
     <maven.compiler.source>1.7</maven.compiler.source>
     <maven.compiler.target>1.7</maven.compiler.target>
   </properties>
+
+  <dependencyManagement>
+    <dependencies>
+      <dependency>
+        <groupId>io.grpc</groupId>
+        <artifactId>grpc-bom</artifactId>
+        <version>${grpc.version}</version>
+        <type>pom</type>
+        <scope>import</scope>
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
+
   <dependencies>
     <dependency>
       <groupId>io.grpc</groupId>
       <artifactId>grpc-netty-shaded</artifactId>
-      <version>${grpc.version}</version>
       <scope>runtime</scope>
     </dependency>
     <dependency>
       <groupId>io.grpc</groupId>
       <artifactId>grpc-protobuf</artifactId>
-      <version>${grpc.version}</version>
     </dependency>
     <dependency>
       <groupId>io.grpc</groupId>
       <artifactId>grpc-stub</artifactId>
-      <version>${grpc.version}</version>
     </dependency>
     <dependency>
       <groupId>javax.annotation</groupId>
@@ -45,7 +55,6 @@
     <dependency>
       <groupId>io.grpc</groupId>
       <artifactId>grpc-testing</artifactId>
-      <version>${grpc.version}</version>
       <scope>test</scope>
     </dependency>
     <dependency>
@@ -66,6 +75,7 @@
       <scope>test</scope>
     </dependency>
   </dependencies>
+
   <build>
     <extensions>
       <extension>
diff --git a/settings.gradle b/settings.gradle
index 9663a3c195..9fc061ef58 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -19,6 +19,7 @@ include ":grpc-alts"
 include ":grpc-benchmarks"
 include ":grpc-services"
 include ":grpc-xds"
+include ":grpc-bom"
 
 project(':grpc-core').projectDir = "$rootDir/core" as File
 project(':grpc-context').projectDir = "$rootDir/context" as File
@@ -40,6 +41,7 @@ project(':grpc-alts').projectDir = "$rootDir/alts" as File
 project(':grpc-benchmarks').projectDir = "$rootDir/benchmarks" as File
 project(':grpc-services').projectDir = "$rootDir/services" as File
 project(':grpc-xds').projectDir = "$rootDir/xds" as File
+project(':grpc-bom').projectDir = "$rootDir/bom" as File
 
 if (settings.hasProperty('skipCodegen') && skipCodegen.toBoolean()) {
     println '*** Skipping the build of codegen and compilation of proto files because skipCodegen=true'