Provide uber-jar containing relocated copy of ASM

To be used in situations when the class-path has an incompatible version of ASM

Author: mcculls

build.gradle.kts

@@ -2,6 +2,7 @@ plugins {
   java
   `maven-publish`
   signing
+  id("com.gradleup.shadow")
   id("pl.allegro.tech.build.axion-release")
   id("io.github.gradle-nexus.publish-plugin")
 }
@@ -63,6 +64,16 @@ tasks.named<Jar>("sourcesJar") {
   from(allSources())
 }
 
+// produce "-all" jar with a shaded copy of ASM
+tasks.shadowJar {
+  dependsOn(embed)
+  from(embed.map { zipTree(it) })
+  relocate("org.objectweb.asm", "datadog.instrument.asm")
+}
+tasks.assemble {
+  dependsOn(tasks.shadowJar)
+}
+
 publishing {
   publications {
     create<MavenPublication>("maven") {
@@ -89,6 +100,16 @@ publishing {
           developerConnection = "scm:[email protected]:datadog/dd-instrument-java.git"
           url = "https://github.com/datadog/dd-instrument-java"
         }
+        withXml {
+          // mark ASM dependency as optional
+          var doc = asElement().ownerDocument
+          var deps = doc.getElementsByTagName("dependency")
+          for (i in 0 ..< deps.length) {
+            var optional = doc.createElement("optional")
+            optional.textContent = "true"
+            deps.item(i).appendChild(optional)
+          }
+        }
       }
     }
   }

buildSrc/build.gradle.kts

@@ -9,6 +9,7 @@ repositories {
 dependencies {
   // needed to re-use the 'libs' version catalog between the main project and buildSrc
   implementation(files(libs.javaClass.superclass.protectionDomain.codeSource.location))
+  implementation(libs.shadow)
   implementation(libs.spotless)
   implementation(libs.spotbugs)
   implementation(libs.axion.release)

gradle/libs.versions.toml

@@ -1,5 +1,6 @@
 [versions]
 asm = "9.8"
+shadow = "9.2.2"
 junit-jupiter = "5.13.4"
 junit-platform = "1.13.4"
 assertj = "3.27.5"
@@ -12,6 +13,7 @@ jmh-plugin = "0.7.3"
 
 [libraries]
 asm = { module = "org.ow2.asm:asm", version.ref = "asm" }
+shadow = { module = "com.gradleup.shadow:shadow-gradle-plugin", version.ref = "shadow" }
 junit-jupiter = { module = "org.junit.jupiter:junit-jupiter", version.ref = "junit-jupiter" }
 junit-launcher = { module = "org.junit.platform:junit-platform-launcher", version.ref = "junit-platform" }
 assertj-core = { module = "org.assertj:assertj-core", version.ref = "assertj" }