fix: #362 use project instead of rootProject to get the release extension

Author: Hillkorn

src/main/groovy/net/researchgate/release/tasks/BaseReleaseTask.groovy

@@ -26,18 +26,9 @@ class BaseReleaseTask extends DefaultTask {
     @Internal
     Map<String, Object> pluginAttributes
 
-    @Internal
-    Project getRootProject() {
-        def project = getProject()
-        if (project.getParent() != null) {
-            return project.getParent()
-        }
-        return project
-    }
-
     BaseReleaseTask() {
         group = RELEASE_GROUP
-        extension = getRootProject().extensions.getByName('release') as ReleaseExtension
+        extension = project.extensions.getByName('release') as ReleaseExtension
         pluginAttributes = extension.attributes
     }
 
@@ -128,7 +119,7 @@ class BaseReleaseTask extends DefaultTask {
     }
 
     String findProperty(String key, Object defaultVal = null, String deprecatedKey = null) {
-        Project project = getRootProject()
+        Project project = project
         def property = System.getProperty(key) ?: project.hasProperty(key) ? project.property(key) : null
 
         if (!property && deprecatedKey) {

src/main/groovy/net/researchgate/release/tasks/PreTagCommit.groovy

@@ -17,7 +17,7 @@ class PreTagCommit extends BaseReleaseTask {
 
     @TaskAction
     void preTagCommit() {
-        BaseScmAdapter scmAdapter = ((ReleaseExtension) getRootProject().extensions.getByName("release")).scmAdapter
+        BaseScmAdapter scmAdapter = ((ReleaseExtension) project.extensions.getByName("release")).scmAdapter
         Map<String, Object> projectAttributes = extension.attributes
         if (projectAttributes.usesSnapshot || projectAttributes.versionModified || projectAttributes.propertiesFileCreated) {
             // should only be committed if the project was using a snapshot version.

src/main/groovy/net/researchgate/release/tasks/PrepareVersions.groovy

@@ -13,9 +13,8 @@ class PrepareVersions extends BaseReleaseTask {
 
     @TaskAction
     def prepareVersions() {
-        Project rootProject = getRootProject()
         String versionPropertyFilepath = extension.versionPropertyFile.get()
-        File rootVersionFile = rootProject.file(versionPropertyFilepath)
+        File rootVersionFile = project.file(versionPropertyFilepath)
         if (rootVersionFile.file) {
             return
         }