add node_modules to address #4364

1 files changed, 88 insertions, 0 deletions

diff --git a/node_modules/gulp-gzip/lib/compress.js b/node_modules/gulp-gzip/lib/compress.js
new file mode 100755
index 000000000..db04c4c23
--- /dev/null
+++ b/node_modules/gulp-gzip/lib/compress.js
@@ -0,0 +1,88 @@
+var zlib     = require('zlib');
+var Readable = require('stream').Readable;
+var toArray  = require('stream-to-array');
+
+function convertContentsToBuffer(contents, callback) {
+  if (contents instanceof Buffer) {
+    callback(null, contents);
+  } else {
+    toArray(contents, function (err, chunks) {
+      if (err) {
+        callback(err, null);
+        return;
+      }
+
+      callback(null, Buffer.concat(chunks));
+    });
+  }
+}
+
+function convertContentsToStream(contents, callback) {
+  if (contents instanceof Readable) {
+    callback(null, contents);
+  } else {
+  var rs = new Readable({ objectMode: true });
+    rs._read = function() {
+      rs.push(contents);
+      rs.push(null);
+    };
+    callback(null, rs);
+  }
+}
+
+module.exports = function(originalContents, options, callback) {
+
+  convertContentsToBuffer(originalContents, function(err, contentsAsBuffer) {
+    if (err) {
+      callback(err, null, false);
+      return;
+    }
+
+    var originalContentLength = contentsAsBuffer.length;
+
+    // Check if the threshold option is set
+    // If true, check if the buffer length is greater than the threshold
+    if (options.threshold && originalContentLength < options.threshold) {
+      // File size is smaller than the threshold
+      // Pass it along to the next plugin without compressing
+        if (originalContents instanceof Buffer) {
+          callback(null, contentsAsBuffer, false);
+        } else {
+          convertContentsToStream(contentsAsBuffer, function(err, contentsAsStream) {
+            callback(null, contentsAsStream, false);
+          });
+        }
+      return;
+    }
+
+    convertContentsToStream(contentsAsBuffer, function(err, contentsAsStream) {
+      if (err) {
+        callback(err, null, false);
+        return;
+      }
+
+      // Compress the contents
+      var gzipStream = zlib.createGzip(options.gzipOptions);
+      contentsAsStream.pipe(gzipStream);
+
+      convertContentsToBuffer(gzipStream, function(err, compressedContentsAsBuffer) {
+        if (err) {
+          callback(err, null, false);
+          return;
+        }
+
+        if (options.skipGrowingFiles && compressedContentsAsBuffer.length >= originalContentLength) {
+          callback(null, originalContents, false);
+        } else {
+          if (originalContents instanceof Buffer) {
+            callback(null, compressedContentsAsBuffer, true);
+          } else {
+            convertContentsToStream(compressedContentsAsBuffer, function(err, compressedContentsStream) {
+              callback(null, compressedContentsStream, true);
+            });
+          }
+        }
+      });
+    });
+  });
+};