Add the ability to sync kube config files (#2567)

* Add the ability to sync kube config files

- Will update when the files changes

- add KUBECONFIG_SYNC label

- fix rebase and change to addObservableSource

- move UI to user settings

- support shallow folder watching

- add some unit tests for the diff-er

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* responding to review comments

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* fix tests and add try/catch

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* always sync c&p folder, remove bad rebase

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* fix preferences

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* Fix settings saving and catalog view

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* fix unit tests

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* fix synced clusters not connectable

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* change to non-complete shallow watching

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* fix sizing

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* Catch readStream errors

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* don't clear UserStore on non-existant preference field, fix unlinking not removing items from source

Signed-off-by: Sebastian Malton <sebastian@malton.name>

* change label to file

Signed-off-by: Sebastian Malton <sebastian@malton.name>

src/common/utils/extended-map.ts

@@ -0,0 +1,64 @@
+import { action, IEnhancer, IObservableMapInitialValues, ObservableMap } from "mobx";
+
+export class ExtendedMap<K, V> extends Map<K, V> {
+  constructor(protected getDefault: () => V, entries?: readonly (readonly [K, V])[] | null) {
+    super(entries);
+  }
+
+  getOrInsert(key: K, val: V): V {
+    if (this.has(key)) {
+      return this.get(key);
+    }
+
+    return this.set(key, val).get(key);
+  }
+
+  getOrInsertWith(key: K, getVal: () => V): V {
+    if (this.has(key)) {
+      return this.get(key);
+    }
+
+    return this.set(key, getVal()).get(key);
+  }
+
+  getOrDefault(key: K): V {
+    if (this.has(key)) {
+      return this.get(key);
+    }
+
+    return this.set(key, this.getDefault()).get(key);
+  }
+}
+
+export class ExtendedObservableMap<K, V> extends ObservableMap<K, V> {
+  constructor(protected getDefault: () => V, initialData?: IObservableMapInitialValues<K, V>, enhancer?: IEnhancer<V>, name?: string) {
+    super(initialData, enhancer, name);
+  }
+
+  @action
+  getOrInsert(key: K, val: V): V {
+    if (this.has(key)) {
+      return this.get(key);
+    }
+
+    return this.set(key, val).get(key);
+  }
+
+  @action
+  getOrInsertWith(key: K, getVal: () => V): V {
+    if (this.has(key)) {
+      return this.get(key);
+    }
+
+    return this.set(key, getVal()).get(key);
+  }
+
+  @action
+  getOrDefault(key: K): V {
+    if (this.has(key)) {
+      return this.get(key);
+    }
+
+    return this.set(key, this.getDefault()).get(key);
+  }
+}