NPM neverending discussion

More info here:

- npm/npm#3055
- yarnpkg/yarn#2875

.gitignore

@@ -2,7 +2,7 @@
 /node_modules
 
 # build
-/lib
+#/lib
 
 # log
 *.log

lib/index.js

@@ -0,0 +1,42 @@
+'use strict';
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+
+exports.default = function (_ref) {
+  var t = _ref.types;
+
+  var defaultPrefix = 'data-qa';
+  var defaultDebugProperty = 'qa';
+
+  var prefix = void 0;
+  var componentAttr = void 0;
+
+  var visitor = {
+    Program: function Program(path, state) {
+      if (state.opts.prefix) {
+        prefix = 'data-' + state.opts.prefix;
+      } else {
+        prefix = defaultPrefix;
+      }
+      componentAttr = prefix + '-component';
+    },
+    JSXOpeningElement: function JSXOpeningElement(path, state) {
+      var attributes = path.container.openingElement.attributes;
+      var newAttributes = [];
+
+      if (state.file && state.file.opts) {
+        var source = state.file.opts.sourceFileName.replace(/\/index.jsx$/, '').replace(/.jsx$/, '');
+
+        newAttributes.push(t.jSXAttribute(t.jSXIdentifier(componentAttr), t.jSXExpressionContainer(t.logicalExpression('&&', t.memberExpression(t.identifier('__DEBUG'), t.identifier(defaultDebugProperty)), t.stringLiteral(source)))));
+      }
+
+      attributes.push.apply(attributes, newAttributes);
+    }
+  };
+
+  return {
+    visitor: visitor
+  };
+};