From b47fd1f6b481460ff0db88b39934243ecb251092 Mon Sep 17 00:00:00 2001
From: Ruben Hoenle <Ruben.Hoenle@stackit.cloud>
Date: Thu, 4 Dec 2025 17:37:51 +0100
Subject: [PATCH] feat(ci): add version linter

---
 Makefile                                      |  1 +
 build.gradle                                  |  2 ++
 .../src/main/groovy/VersionCheckTask.groovy   | 24 +++++++++++++++++++
 3 files changed, 27 insertions(+)
 create mode 100644 buildSrc/src/main/groovy/VersionCheckTask.groovy

diff --git a/Makefile b/Makefile
index 686a63b..1605671 100644
--- a/Makefile
+++ b/Makefile
@@ -6,6 +6,7 @@ fmt:
 
 lint:
 	@./gradlew pmdMain
+	@./gradlew lintProjectVersion
 
 test:
 	@./gradlew test
diff --git a/build.gradle b/build.gradle
index 07e2e25..52d45de 100644
--- a/build.gradle
+++ b/build.gradle
@@ -113,6 +113,8 @@ subprojects {
 			logger.warn("VERSION file not found in project '${project.path}'. Skipping version setting.")
 		}
 
+		tasks.register('lintProjectVersion', VersionCheckTask) {}
+
 		java {
 			withSourcesJar()
 			withJavadocJar()
diff --git a/buildSrc/src/main/groovy/VersionCheckTask.groovy b/buildSrc/src/main/groovy/VersionCheckTask.groovy
new file mode 100644
index 0000000..8b9abc4
--- /dev/null
+++ b/buildSrc/src/main/groovy/VersionCheckTask.groovy
@@ -0,0 +1,24 @@
+import org.gradle.api.DefaultTask
+import org.gradle.api.tasks.TaskAction
+import org.gradle.api.tasks.Input
+import org.gradle.api.GradleException
+
+class VersionCheckTask extends DefaultTask {
+    @Input
+    def versionRegex = ~/^[0-1]\.\d+\.\d+$/
+
+    @TaskAction
+    def checkVersion() {
+        File versionFile = project.file('VERSION')
+
+        if (!versionFile.exists()) {
+            logger.quiet("VERSION file not found in subproject: ${project.name}")
+            return
+        }
+
+        def version = versionFile.text.trim()
+        if (!(version =~ versionRegex)) {
+            throw new GradleException("Version '${version}' in project '${project.name}' does not match regex: ${versionRegex}")
+        }
+    }
+}