Kubeconfigs as file references (#466)

Signed-off-by: Jussi Nummelin <jussi.nummelin@gmail.com>
Co-authored-by: Lauri Nevala <lauri.nevala@gmail.com>
Co-authored-by: Jari Kolehmainen <jari.kolehmainen@gmail.com>

src/common/utils/kubeconfig.ts

@@ -0,0 +1,16 @@
+import { app, remote } from "electron"
+import  { ensureDirSync, writeFileSync } from "fs-extra"
+import * as path from "path"
+
+// Writes kubeconfigs to "embedded" store, i.e. .../Lens/kubeconfigs/
+export function writeEmbeddedKubeConfig(clusterId: string, kubeConfig: string): string {
+  // This can be called from main & renderer
+  const a = (app || remote.app)
+  const kubeConfigBase = path.join(a.getPath("userData"), "kubeconfigs")
+  ensureDirSync(kubeConfigBase)
+
+  const kubeConfigFile = path.join(kubeConfigBase, clusterId)
+  writeFileSync(kubeConfigFile, kubeConfig)
+
+  return kubeConfigFile
+}