fix subproject versions not updating in gradle 9.8.0+

src/main/kotlin/dev/poolside/gradle/semanticversion/SemanticVersionPlugin.kt

@@ -26,5 +26,13 @@ class SemanticVersionPlugin : Plugin<Project> {
         project.tasks.withType<GenerateMavenPom> {
             this.dependsOn("semanticVersion")
         }
+        project.gradle.projectsEvaluated {
+            val semanticVersionTasks = project.rootProject.allprojects.flatMap {
+                it.tasks.withType(SemanticVersionTask::class.java).toList()
+            }
+            project.tasks.withType<GenerateMavenPom>().configureEach {
+                dependsOn(semanticVersionTasks)
+            }
+        }
     }
 }

src/main/kotlin/dev/poolside/gradle/semanticversion/SemanticVersionTask.kt

@@ -102,8 +102,8 @@ abstract class SemanticVersionTask : DefaultTask() {
                         val group = dep.getElementsByTagName("groupId").item(0).textContent
                         val artifact = dep.getElementsByTagName("artifactId").item(0).textContent
                         val key = "${group}:${artifact}"
-                        if (versions.containsKey(key)) {
-                            val version = versions[key]
+                        val version = versions[key] ?: publicationVersion(group, artifact)
+                        if (version != null) {
                             dep.getElementsByTagName("version").item(0).textContent = version
                         }
                     }
@@ -113,4 +113,12 @@ abstract class SemanticVersionTask : DefaultTask() {
             }
         }
     }
+
+    private fun publicationVersion(groupId: String, artifactId: String): String? =
+        project.rootProject.allprojects
+            .asSequence()
+            .mapNotNull { it.extensions.findByType(PublishingExtension::class.java) }
+            .flatMap { it.publications.withType(MavenPublication::class.java).asSequence() }
+            .find { it.groupId == groupId && it.artifactId == artifactId }
+            ?.version
 }

src/test/kotlin/dev/poolside/gradle/semanticversion/PomParser.kt

@@ -2,6 +2,7 @@ package dev.poolside.gradle.semanticversion
 
 import com.fasterxml.jackson.databind.DeserializationFeature
 import com.fasterxml.jackson.dataformat.xml.XmlMapper
+import com.fasterxml.jackson.dataformat.xml.annotation.JacksonXmlElementWrapper
 import com.fasterxml.jackson.module.kotlin.readValue
 import com.fasterxml.jackson.module.kotlin.registerKotlinModule
 import java.io.File
@@ -15,4 +16,11 @@ object PomParser {
     }
 }
 
-data class Pom(val groupId: String, val artifactId: String, val version: String)
+data class Pom(val groupId: String, val artifactId: String, val version: String, val dependencies: Dependencies? = null)
+
+data class Dependencies(
+    @field:JacksonXmlElementWrapper(useWrapping = false)
+    val dependency: List<Dependency> = emptyList()
+)
+
+data class Dependency(val groupId: String, val artifactId: String, val version: String)

src/test/kotlin/dev/poolside/gradle/semanticversion/PomParserTest.kt

@@ -0,0 +1,48 @@
+package dev.poolside.gradle.semanticversion
+
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Test
+import org.junit.jupiter.api.io.TempDir
+import java.io.File
+
+class PomParserTest {
+
+    @TempDir
+    lateinit var testProjectDir: File
+
+    @Test
+    fun `parses dependencies`() {
+        val pomFile = File(testProjectDir, "pom.xml")
+        pomFile.writeText(
+            """
+            <project>
+                <groupId>dev.poolside.test</groupId>
+                <artifactId>my-library</artifactId>
+                <version>1.0.0</version>
+                <dependencies>
+                    <dependency>
+                        <groupId>org.apache.commons</groupId>
+                        <artifactId>commons-math3</artifactId>
+                        <version>3.6.1</version>
+                    </dependency>
+                    <dependency>
+                        <groupId>com.google.guava</groupId>
+                        <artifactId>guava</artifactId>
+                        <version>30.1.1-jre</version>
+                    </dependency>
+                </dependencies>
+            </project>
+            """.trimIndent()
+        )
+
+        val pom = PomParser.parse(pomFile.absolutePath)
+
+        assertEquals(
+            listOf(
+                Dependency("org.apache.commons", "commons-math3", "3.6.1"),
+                Dependency("com.google.guava", "guava", "30.1.1-jre")
+            ),
+            pom.dependencies?.dependency
+        )
+    }
+}

src/test/kotlin/dev/poolside/gradle/semanticversion/SemanticVersionPluginTest.kt

@@ -705,6 +705,10 @@ class SemanticVersionPluginTest {
             pomFile.forEachLine { println(it) }
             val pom = PomParser.parse(pomFile.absolutePath)
             assertEquals("0.1.0", pom.version)
+            val lib = pom.dependencies?.dependency?.find { it.groupId == "dev.poolside.test" }
+            if (lib != null) {
+                assertEquals("0.1.0", lib.version)
+            }
         }
         val valid = mutableListOf(
             "${mavenRepo.absolutePath}/dev/poolside/test/my-library/0.1.0/my-library-0.1.0.jar",