Support non-ascii characters in entity names (#2610)

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

src/common/utils/index.ts

@@ -19,3 +19,6 @@ export * from "./downloadFile";
 export * from "./escapeRegExp";
 export * from "./tar";
 export * from "./type-narrowing";
+import * as iter from "./iter";
+
+export { iter };

src/common/utils/iter.ts

@@ -0,0 +1,25 @@
+/**
+ * Create a new type safe empty Iterable
+ * @returns An `Iterable` that yields 0 items
+ */
+export function* newEmpty<T>(): Iterable<T> {
+  return;
+}
+
+/**
+ * Creates a new `Iterable` that yields at most n items from src.
+ * Does not modify `src` which can be used later.
+ * @param src An initial iterator
+ * @param n The maximum number of elements to take from src. Yields up to the floor of `n` and 0 items if n < 0
+ */
+export function* take<T>(src: Iterable<T>, n: number): Iterable<T> {
+  outer: for (let i = 0; i < n; i += 1) {
+    for (const item of src) {
+      yield item;
+      continue outer;
+    }
+
+    // if we are here that means that `src` has been exhausted. Don't bother trying again.
+    break outer;
+  }
+}