Merge pull request #14923 from rjernst/enforce_gradle_idea

Enforce that gradle idea was run before importing in intellij

build.gradle

@@ -169,6 +169,15 @@ idea {
     vcs = 'Git'
   }
 }
+// Make sure gradle idea was run before running anything in intellij (including import).
+File ideaMarker = new File(projectDir, '.local-idea-is-configured')
+tasks.idea.doLast {
+  ideaMarker.setText('', 'UTF-8')
+}
+if (System.getProperty('idea.active') != null && ideaMarker.exists() == false) {
+  throw new GradleException('You must run gradle idea from the root of elasticsearch before importing into IntelliJ')
+}
+
 
 // eclipse configuration
 allprojects {