Add yaml module

It uses multibindings to allow additional Jackson modules to be
registered across different Guice modules while using a single
ObjectMapper for the whole application.

Signed-off-by: Graham <gpe@openrs2.dev>

settings.gradle.kts

@@ -18,7 +18,8 @@ include(
     "deob-map",
     "deob-processor",
     "game",
-    "util"
+    "util",
+    "yaml"
 )
 
 if (Files.exists(rootProject.projectDir.toPath().resolve("nonfree/build.gradle.kts"))) {

yaml/build.gradle.kts

@@ -0,0 +1,28 @@
+plugins {
+    `maven-publish`
+    kotlin("jvm")
+}
+
+dependencies {
+    api("com.fasterxml.jackson.core:jackson-databind:${Versions.jackson}")
+    api("com.google.inject:guice:${Versions.guice}")
+
+    implementation("com.fasterxml.jackson.dataformat:jackson-dataformat-yaml:${Versions.jackson}")
+    implementation("com.fasterxml.jackson.module:jackson-module-kotlin:${Versions.jackson}")
+}
+
+publishing {
+    publications.create<MavenPublication>("maven") {
+        from(components["java"])
+
+        pom {
+            packaging = "jar"
+            name.set("OpenRS2 YAML")
+            description.set(
+                """
+                Guava module for creating a YAML ObjectMapper.
+            """.trimIndent()
+            )
+        }
+    }
+}

yaml/src/main/java/dev/openrs2/yaml/ObjectMapperProvider.kt

@@ -0,0 +1,18 @@
+package dev.openrs2.yaml
+
+import com.fasterxml.jackson.databind.Module
+import com.fasterxml.jackson.databind.ObjectMapper
+import com.fasterxml.jackson.dataformat.yaml.YAMLFactory
+import com.fasterxml.jackson.module.kotlin.registerKotlinModule
+import javax.inject.Inject
+import javax.inject.Provider
+
+class ObjectMapperProvider @Inject constructor(
+    private val modules: Set<@JvmSuppressWildcards Module>
+) : Provider<ObjectMapper> {
+    override fun get(): ObjectMapper {
+        return ObjectMapper(YAMLFactory())
+            .registerKotlinModule()
+            .registerModules(modules)
+    }
+}

yaml/src/main/java/dev/openrs2/yaml/YamlModule.kt

@@ -0,0 +1,17 @@
+package dev.openrs2.yaml
+
+import com.fasterxml.jackson.databind.Module
+import com.fasterxml.jackson.databind.ObjectMapper
+import com.google.inject.AbstractModule
+import com.google.inject.Scopes
+import com.google.inject.multibindings.Multibinder
+
+class YamlModule : AbstractModule() {
+    override fun configure() {
+        Multibinder.newSetBinder(binder(), Module::class.java)
+
+        bind(ObjectMapper::class.java)
+            .toProvider(ObjectMapperProvider::class.java)
+            .`in`(Scopes.SINGLETON)
+    }
+}