Add vars/\src\com\sphinx\BuildInfo.groovy

vars/\src\com\sphinx\BuildInfo.groovy

@@ -0,0 +1,19 @@
+package com.sphinx
+
+// Helper class: build a version string and expose it to pipelines.
+// Usage in a Jenkinsfile:
+//   import com.sphinx.BuildInfo
+//   def info = new BuildInfo(this)
+//   echo info.version('demo')
+class BuildInfo implements Serializable {
+    def steps
+    BuildInfo(steps) { this.steps = steps }
+
+    String version(String app) {
+        return "${app}-1.0.${steps.env.BUILD_NUMBER}"
+    }
+
+    String timestamp() {
+        return new Date().format("yyyyMMdd-HHmmss")
+    }
+}