add clean function (#211)

src/utilities/workflowAnnotationUtils.ts

@@ -47,3 +47,14 @@ export function getWorkflowAnnotationKeyLabel(
       .digest('hex')
    return `githubWorkflow_${hashKey}`
 }
+
+/**
+ * Cleans label to match valid kubernetes label specification by removing invalid characters
+ * @param label
+ * @returns cleaned label
+ */
+export function cleanLabel(label: string): string {
+   const removedInvalidChars = label.replace(/[^-A-Za-z0-9_.]/gi, '')
+   const regex = /([A-Za-z0-9][-A-Za-z0-9_.]*)?[A-Za-z0-9]/
+   return regex.exec(removedInvalidChars)[0] || ''
+}