Avoid duplicate JAR names

build-plugin/src/main/kotlin/thunderbird.library.jvm.gradle.kts

@@ -1,3 +1,5 @@
+import org.gradle.jvm.tasks.Jar
+
 plugins {
     `java-library`
     id("org.jetbrains.kotlin.jvm")
@@ -8,6 +10,13 @@ java {
     targetCompatibility = ThunderbirdProjectConfig.javaCompatibilityVersion
 }
 
+tasks.withType<Jar> {
+    // We want to avoid ending up with multiple JARs having the same name, e.g. "common.jar".
+    // To do this, we use the modified project path as base name, e.g. ":core:common" -> "core.common".
+    val projectDotPath = project.path.split(":").filter { it.isNotEmpty() }.joinToString(separator = ".")
+    archiveBaseName.set(projectDotPath)
+}
+
 configureKotlinJavaCompatibility()
 
 dependencies {