Added functionality to long broken zippedArchive option

lib/winston/transports/file.js

@@ -198,7 +198,7 @@ module.exports = class File extends TransportStream {
         return;
       }
       if (this.lazy) {
-        this._endStream(() => {this.emit('fileclosed')});
+        this._endStream(() => {this.emit('fileclosed');});
         return;
       }
 
@@ -603,12 +603,6 @@ module.exports = class File extends TransportStream {
       });
 
     debug('create stream ok', fullpath);
-    if (this.zippedArchive) {
-      const gzip = zlib.createGzip();
-      gzip.pipe(dest);
-      return gzip;
-    }
-
     return dest;
   }
 
@@ -621,13 +615,33 @@ module.exports = class File extends TransportStream {
     debug('_incFile', this.filename);
     const ext = path.extname(this._basename);
     const basename = path.basename(this._basename, ext);
+    const tasks = [];
 
-    if (!this.tailable) {
-      this._created += 1;
-      this._checkMaxFilesIncrementing(ext, basename, callback);
-    } else {
-      this._checkMaxFilesTailable(ext, basename, callback);
+    if (this.zippedArchive) {
+      tasks.push(
+        function (cb) {
+          const num = this._created > 0 && !this.tailable ? this._created : '';
+          this._compressFile(
+            path.join(this.dirname, `${basename}${num}${ext}`),
+            path.join(this.dirname, `${basename}${num}${ext}.gz`),
+            cb
+          );
+        }.bind(this)
+      );
     }
+
+    tasks.push(
+      function (cb) {
+        if (!this.tailable) {
+          this._created += 1;
+          this._checkMaxFilesIncrementing(ext, basename, cb);
+        } else {
+          this._checkMaxFilesTailable(ext, basename, cb);
+        }
+      }.bind(this)
+    );
+
+    asyncSeries(tasks, callback);
   }
 
   /**
@@ -646,13 +660,9 @@ module.exports = class File extends TransportStream {
     // Caveat emptor (indexzero): rotationFormat() was broken by design When
     // combined with max files because the set of files to unlink is never
     // stored.
-    const target = !this.tailable && this._created
+    return !this.tailable && this._created
       ? `${basename}${isRotation}${ext}`
       : `${basename}${ext}`;
-
-    return this.zippedArchive && !this.tailable
-      ? `${target}.gz`
-      : target;
   }
 
   /**
@@ -715,13 +725,36 @@ module.exports = class File extends TransportStream {
 
     asyncSeries(tasks, () => {
       fs.rename(
-        path.join(this.dirname, `${basename}${ext}`),
+        path.join(this.dirname, `${basename}${ext}${isZipped}`),
         path.join(this.dirname, `${basename}1${ext}${isZipped}`),
         callback
       );
     });
   }
 
+  /**
+   * Compresses src to dest with gzip and unlinks src
+   * @param {string} src - path to source file.
+   * @param {string} dest - path to zipped destination file.
+   * @param {Function} callback - callback called after file has been compressed.
+   * @returns {undefined}
+   * @private
+   */
+  _compressFile(src, dest, callback) {
+    fs.access(src, fs.F_OK, (err) => {
+      if (err) {
+        return callback();
+      }
+      var gzip = zlib.createGzip();
+      var inp = fs.createReadStream(src);
+      var out = fs.createWriteStream(dest);
+      out.on('finish', () => {
+        fs.unlink(src, callback);
+      });
+      inp.pipe(gzip).pipe(out);
+    });
+  }
+
   _createLogDirIfNotExist(dirPath) {
     /* eslint-disable no-sync */
     if (!fs.existsSync(dirPath)) {