first commit

app_vue/node_modules/webpack-bundle-analyzer/lib/statsUtils.js

@@ -0,0 +1,90 @@
+"use strict";
+
+const {
+  createWriteStream
+} = require('fs');
+
+const {
+  Readable
+} = require('stream');
+
+class StatsSerializeStream extends Readable {
+  constructor(stats) {
+    super();
+    this._indentLevel = 0;
+    this._stringifier = this._stringify(stats);
+  }
+
+  get _indent() {
+    return '  '.repeat(this._indentLevel);
+  }
+
+  _read() {
+    let readMore = true;
+
+    while (readMore) {
+      const {
+        value,
+        done
+      } = this._stringifier.next();
+
+      if (done) {
+        this.push(null);
+        readMore = false;
+      } else {
+        readMore = this.push(value);
+      }
+    }
+  }
+
+  *_stringify(obj) {
+    if (typeof obj === 'string' || typeof obj === 'number' || typeof obj === 'boolean' || obj === null) {
+      yield JSON.stringify(obj);
+    } else if (Array.isArray(obj)) {
+      yield '[';
+      this._indentLevel++;
+      let isFirst = true;
+
+      for (let item of obj) {
+        if (item === undefined) {
+          item = null;
+        }
+
+        yield `${isFirst ? '' : ','}\n${this._indent}`;
+        yield* this._stringify(item);
+        isFirst = false;
+      }
+
+      this._indentLevel--;
+      yield obj.length ? `\n${this._indent}]` : ']';
+    } else {
+      yield '{';
+      this._indentLevel++;
+      let isFirst = true;
+      const entries = Object.entries(obj);
+
+      for (const [itemKey, itemValue] of entries) {
+        if (itemValue === undefined) {
+          continue;
+        }
+
+        yield `${isFirst ? '' : ','}\n${this._indent}${JSON.stringify(itemKey)}: `;
+        yield* this._stringify(itemValue);
+        isFirst = false;
+      }
+
+      this._indentLevel--;
+      yield entries.length ? `\n${this._indent}}` : '}';
+    }
+  }
+
+}
+
+exports.StatsSerializeStream = StatsSerializeStream;
+exports.writeStats = writeStats;
+
+async function writeStats(stats, filepath) {
+  return new Promise((resolve, reject) => {
+    new StatsSerializeStream(stats).on('end', resolve).on('error', reject).pipe(createWriteStream(filepath));
+  });
+}