diff --git a/vars/readCommonBash.groovy b/vars/readCommonBash.groovy
new file mode 100644
index 0000000..dff621c
--- /dev/null
+++ b/vars/readCommonBash.groovy
@@ -0,0 +1,4 @@
+def call(String key = 'maintainer') {
+  def matcher = readFile('common.bash') =~ (key + '="(.+)"')
+  matcher ? matcher[0][1] : 'null'
+}
\ No newline at end of file