feat: Support graphql-kotlin-bom (#2020)

### 📝 Description

Adding a support on `graphql-kotlin-bom`

Generated BOM looks like this:

```
<?xml version="1.0" encoding="UTF-8"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <!-- This module was also published with a richer model, Gradle metadata,  -->
  <!-- which should be used instead. Do not delete the following line which  -->
  <!-- is to indicate to Gradle or any Gradle module metadata file consumer  -->
  <!-- that they should prefer consuming it instead. -->
  <!-- do_not_remove: published-with-gradle-metadata -->
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.expediagroup</groupId>
  <artifactId>graphql-kotlin-bom</artifactId>
  <version>8.0.0-SNAPSHOT</version>
  <packaging>pom</packaging>
  <name>graphql-kotlin-bom</name>
  <description>BOM (Bill Of Materials) for graphql-kotlin</description>
  <dependencies>
    <dependency>
      <groupId>com.expediagroup</groupId>
      <artifactId>graphql-kotlin-automatic-persisted-queries</artifactId>
      <version>8.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.expediagroup</groupId>
      <artifactId>graphql-kotlin-client</artifactId>
      <version>8.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.expediagroup</groupId>
      <artifactId>graphql-kotlin-client-generator</artifactId>
      <version>8.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.expediagroup</groupId>
      <artifactId>graphql-kotlin-client-jackson</artifactId>
      <version>8.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.expediagroup</groupId>
      <artifactId>graphql-kotlin-client-serialization</artifactId>
      <version>8.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.expediagroup</groupId>
      <artifactId>graphql-kotlin-dataloader</artifactId>
      <version>8.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.expediagroup</groupId>
      <artifactId>graphql-kotlin-dataloader-instrumentation</artifactId>
      <version>8.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.expediagroup</groupId>
      <artifactId>graphql-kotlin-federated-hooks-provider</artifactId>
      <version>8.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.expediagroup</groupId>
      <artifactId>graphql-kotlin-federation</artifactId>
      <version>8.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.expediagroup</groupId>
      <artifactId>graphql-kotlin-graalvm-metadata-generator</artifactId>
      <version>8.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.expediagroup</groupId>
      <artifactId>graphql-kotlin-gradle-plugin</artifactId>
      <version>8.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.expediagroup</groupId>
      <artifactId>graphql-kotlin-hooks-provider</artifactId>
      <version>8.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.expediagroup</groupId>
      <artifactId>graphql-kotlin-ktor-client</artifactId>
      <version>8.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.expediagroup</groupId>
      <artifactId>graphql-kotlin-ktor-server</artifactId>
      <version>8.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.expediagroup</groupId>
      <artifactId>graphql-kotlin-maven-plugin</artifactId>
      <version>8.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.expediagroup</groupId>
      <artifactId>graphql-kotlin-schema-generator</artifactId>
      <version>8.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.expediagroup</groupId>
      <artifactId>graphql-kotlin-sdl-generator</artifactId>
      <version>8.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.expediagroup</groupId>
      <artifactId>graphql-kotlin-server</artifactId>
      <version>8.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.expediagroup</groupId>
      <artifactId>graphql-kotlin-spring-client</artifactId>
      <version>8.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>com.expediagroup</groupId>
      <artifactId>graphql-kotlin-spring-server</artifactId>
      <version>8.0.0-SNAPSHOT</version>
      <scope>compile</scope>
    </dependency>
  </dependencies>
</project>
```

### 🔗 Related Issues

---------

Co-authored-by: Kevin Jung <kjung@expediagroup.com>

bom/README.md

@@ -0,0 +1,48 @@
+# GraphQL Kotlin BOM
+[![Maven Central](https://img.shields.io/maven-central/v/com.expediagroup/graphql-kotlin-bom.svg?label=Maven%20Central)](https://central.sonatype.com/search?namespace=com.expediagroup&q=name%3Agraphql-kotlin-bom)
+
+`graphql-kotlin-bom` defines the versions of all the modules in `graphql-kotlin`.
+This allows the version of the modules imported in your project to be consistent
+without needing to specify the version of each module.
+
+## Usage
+
+With Maven, import a dependency on `graphql-kotlin-bom` in `dependencyManagement` section in your project pom,
+and add dependencies on `graphql-kotlin` modules with no version.
+
+```xml
+<dependencyManagement>
+  <dependencies>
+    <dependency>
+      <groupId>com.expediagroup</groupId>
+      <artifactId>graphql-kotlin-bom</artifactId>
+      <version>${latestVersion}</version>
+      <type>pom</type>
+      <scope>import</scope>
+    </dependency>
+  </dependencies>
+</dependencyManagement>
+
+<dependencies>
+  <dependency>
+    <groupId>com.expediagroup</groupId>
+    <artifactId>graphql-kotlin-client</artifactId>
+  </dependency>
+</dependencies>
+```
+
+With Gradle, import `graphql-kotlin-bom` using Gradle `platform`,
+and add dependencies on `graphql-kotlin` modules with no version.
+
+```kotlin
+implementation(platform("com.expediagroup:graphql-kotlin-bom:$latestVersion"))
+
+implementation("com.expediagroup:graphql-kotlin-client")
+```
+
+## Documentation
+
+Additional information can be found in our [documentation](https://opensource.expediagroup.com/graphql-kotlin/docs/server/graphql-server)
+and the [Javadocs](https://www.javadoc.io/doc/com.expediagroup/graphql-kotlin-server) of all published library versions.
+
+If you have a question about something you can not find in our documentation or javadocs, feel free to [start a new discussion](https://github.com/ExpediaGroup/graphql-kotlin/discussions).

bom/build.gradle.kts

@@ -0,0 +1,31 @@
+description = "BOM (Bill Of Materials) for graphql-kotlin"
+
+plugins {
+    `maven-publish`
+    `java-platform`
+}
+
+javaPlatform {
+    allowDependencies()
+}
+
+dependencies {
+    project.rootProject.subprojects.forEach { subproject ->
+        if (subproject.name != "graphql-kotlin-bom") {
+            api(subproject)
+        }
+    }
+}
+
+publishing {
+    publications {
+        create<MavenPublication>("graphql-kotlin-bom") {
+            from(components["javaPlatform"])
+            pom {
+                description = "BOM (Bill Of Materials) for graphql-kotlin"
+                name = "graphql-kotlin-bom"
+                packaging = "pom"
+            }
+        }
+    }
+}

settings.gradle.kts

@@ -32,6 +32,9 @@ include(":graphql-kotlin-dataloader")
 include(":graphql-kotlin-dataloader-instrumentation")
 include(":graphql-kotlin-automatic-persisted-queries")
 
+// BOM
+include(":graphql-kotlin-bom")
+
 //
 // Project mappings so we don't need to create projects that group subprojects
 //
@@ -65,3 +68,6 @@ project(":graphql-kotlin-ktor-server").projectDir = file("servers/graphql-kotlin
 project(":graphql-kotlin-dataloader").projectDir = file("executions/graphql-kotlin-dataloader")
 project(":graphql-kotlin-dataloader-instrumentation").projectDir = file("executions/graphql-kotlin-dataloader-instrumentation")
 project(":graphql-kotlin-automatic-persisted-queries").projectDir = file("executions/graphql-kotlin-automatic-persisted-queries")
+
+// BOM
+project(":graphql-kotlin-bom").projectDir = file("bom")

website/docs/getting-started.mdx

@@ -18,7 +18,9 @@ Using a JVM dependency manager, link any `graphql-kotlin-*` library to your proj
   defaultValue="gradle"
   values={[
     { label: 'Gradle Kotlin', value: 'gradle' },
-    { label: 'Maven', value: 'maven' }
+    { label: 'Gradle Kotlin with BOM', value: 'gradle-bom' },
+    { label: 'Maven', value: 'maven' },
+    { label: 'Maven with BOM', value: 'maven-bom' }
   ]
 }>
 
@@ -28,6 +30,15 @@ Using a JVM dependency manager, link any `graphql-kotlin-*` library to your proj
 implementation("com.expediagroup", "graphql-kotlin-spring-server", latestVersion)
 ```
 
+</TabItem>
+<TabItem value="gradle-bom">
+
+```kotlin
+implementation(platform("com.expediagroup:graphql-kotlin-bom:$latestVersion"))
+
+implementation("com.expediagroup", "graphql-kotlin-spring-server")
+```
+
 </TabItem>
 <TabItem value="maven">
 
@@ -39,6 +50,31 @@ implementation("com.expediagroup", "graphql-kotlin-spring-server", latestVersion
 </dependency>
 ```
 
+</TabItem>
+
+<TabItem value="maven-bom">
+
+```xml
+<dependencyManagement>
+    <dependencies>
+        <dependency>
+            <groupId>com.expediagroup</groupId>
+            <artifactId>graphql-kotlin-bom</artifactId>
+            <version>${latestVersion}</version>
+            <type>pom</type>
+            <scope>import</scope>
+        </dependency>
+    </dependencies>
+</dependencyManagement>
+
+<dependencies>
+    <dependency>
+        <groupId>com.expediagroup</groupId>
+        <artifactId>graphql-kotlin-spring-server</artifactId>
+    </dependency>
+</dependencies>
+```
+
 </TabItem>
 </Tabs>