first commit

node_modules/.ignored/exceljs/lib/utils/iterate-stream.js

@@ -0,0 +1,48 @@
+module.exports = async function* iterateStream(stream) {
+  const contents = [];
+  stream.on('data', data => contents.push(data));
+
+  let resolveStreamEndedPromise;
+  const streamEndedPromise = new Promise(resolve => (resolveStreamEndedPromise = resolve));
+
+  let ended = false;
+  stream.on('end', () => {
+    ended = true;
+    resolveStreamEndedPromise();
+  });
+
+  let error = false;
+  stream.on('error', err => {
+    error = err;
+    resolveStreamEndedPromise();
+  });
+
+  while (!ended || contents.length > 0) {
+    if (contents.length === 0) {
+      stream.resume();
+      // eslint-disable-next-line no-await-in-loop
+      await Promise.race([once(stream, 'data'), streamEndedPromise]);
+    } else {
+      stream.pause();
+      const data = contents.shift();
+      yield data;
+    }
+    if (error) throw error;
+  }
+  resolveStreamEndedPromise();
+};
+
+function once(eventEmitter, type) {
+  // TODO: Use require('events').once when node v10 is dropped
+  return new Promise(resolve => {
+    let fired = false;
+    const handler = () => {
+      if (!fired) {
+        fired = true;
+        eventEmitter.removeListener(type, handler);
+        resolve();
+      }
+    };
+    eventEmitter.addListener(type, handler);
+  });
+}