1 files changed, 59 insertions, 0 deletions
diff --git a/deps/npm/node_modules/readable-stream/node_modules/unreachable-branch-transform/index.js b/deps/npm/node_modules/readable-stream/node_modules/unreachable-branch-transform/index.js
new file mode 100644
index 0000000000..d141d6846e
--- /dev/null
+++ b/deps/npm/node_modules/readable-stream/node_modules/unreachable-branch-transform/index.js
@@ -0,0 +1,59 @@
+var recast = require('recast');
+var stream = require('stream');
+var util = require('util');
+
+var transformer = require('./unreachableBranchTransformer');
+
+module.exports = UBT;
+util.inherits(UBT, stream.Transform);
+
+function UBT(file, opts) {
+  if (!(this instanceof UBT)) {
+    return UBT.configure(opts)(file);
+  }
+
+  stream.Transform.call(this);
+  this._data = '';
+}
+
+UBT.prototype._transform = function(buf, enc, cb) {
+  this._data += buf;
+  cb();
+};
+
+UBT.prototype._flush = function(cb) {
+  try {
+    var code = UBT.transform(this._data);
+    this.push(code);
+  } catch(err) {
+    this.emit('error', err);
+    return;
+  }
+  cb();
+};
+
+UBT.configure = function(opts) {
+  var ignores = ['.json'].concat(opts && opts.ignore || []);
+
+  return function(file) {
+    for (var i = 0; i < ignores.length; i++) {
+      if (endsWith(file, ignores[i])) {
+        return stream.PassThrough();
+      }
+    }
+
+    return new UBT(file);
+  }
+};
+
+UBT.transform = function(code) {
+  var ast = transformer(recast.parse(code));
+  return recast.print(ast).code;
+};
+
+function endsWith(str, suffix) {
+  if (typeof str !== 'string' || typeof suffix !== 'string') {
+    return false;
+  }
+  return str.indexOf(suffix, str.length - suffix.length) !== -1;
+}