Python: move getOrCreateAdditionalData to sdk module.

It doesn't belong to `community.impl`

GitOrigin-RevId: 51e197ca19e5e64363229ddc5c27aa0332fcb62f

python/python-sdk/src/com/jetbrains/python/sdk/PySdkCoreTools.kt

@@ -0,0 +1,41 @@
+package com.jetbrains.python.sdk
+
+import com.intellij.openapi.application.ApplicationManager
+import com.intellij.openapi.projectRoots.Sdk
+import com.jetbrains.python.sdk.flavors.PythonSdkFlavor
+
+/**
+ * Each [Sdk] has [PythonSdkAdditionalData]. Use this method to get it.
+ * Although each SDK should already have one, some old may lack it.
+ *
+ * This method creates new in this case, but only if an SDK flavor doesn't require special additional data.
+ */
+fun Sdk.getOrCreateAdditionalData(): PythonSdkAdditionalData {
+  val existingData = sdkAdditionalData as? PythonSdkAdditionalData
+  if (existingData != null) {
+    return existingData
+  }
+
+  if (homePath == null) {
+    error("homePath is null for $this")
+  }
+
+  val flavor = PythonSdkFlavor.tryDetectFlavorByLocalPath(homePath!!)
+  if (flavor == null) {
+    error("No flavor detected for $homePath sdk")
+  }
+
+  val newData = PythonSdkAdditionalData(if (flavor.supportsEmptyData()) flavor else null)
+  val modificator = sdkModificator
+  modificator.sdkAdditionalData = newData
+  val application = ApplicationManager.getApplication()
+  if (application.isDispatchThread) {
+    application.runWriteAction { modificator.commitChanges() }
+  }
+  else {
+    application.invokeLater {
+      application.runWriteAction { modificator.commitChanges() }
+    }
+  }
+  return newData
+}