Delete on failure.

.editorconfig

@@ -2,7 +2,7 @@ root = true
 
 [*]
 indent_style = space
-indent_size = 4
+indent_size = 2
 end_of_line = lf
 charset = utf-8
 trim_trailing_whitespace = true

Jenkinsfile

@@ -58,7 +58,6 @@ pipeline {
       }
     }
 
-
     stage('build') {
       steps {
         dir("source") {
@@ -67,4 +66,9 @@ pipeline {
       }
     }
   }
+  post {
+    failure {
+      deleteDir()
+    }
+  }
 }