feat(package): Add transformer, doc and README

Author: tpucci

.eslintrc

@@ -1,3 +1,9 @@
 {
-  "extends": ["airbnb"]
+  "extends": ["airbnb"],
+  "rules": {
+    "global-require": "off",
+    "import/no-extraneous-dependencies": "off",
+    "import/no-unresolved": "off",
+    "no-param-reassign": "off"
+  }
 }

index.js

@@ -1 +1,49 @@
-const a = 1;
+const gqlLoader = require('graphql-tag/loader');
+
+let rnTransform = null;
+
+try {
+  // handle RN >= 0.47
+  rnTransform = require('metro-bundler/src/transformer').transform;
+} catch (e) {
+  try {
+    // handle RN 0.46
+    rnTransform = require('metro-bundler/build/transformer').transform;
+  } catch (e2) {
+    // handle RN <= 0.45
+    const oldrnTransform = require('react-native/packager/transformer').transform;
+    rnTransform = {
+      transform({ src, filename, options }) {
+        return oldrnTransform.transform(src, filename, options);
+      },
+    };
+  }
+}
+
+const gqlTransform = gqlLoader.bind({
+  cacheable: () => null,
+});
+
+function transform(src, filename, options) {
+  if (typeof src === 'object') {
+    // handle RN >= 0.46
+    ({ src, filename, options } = src);
+  }
+
+  // Do custom transformations
+  let result = src;
+  if (filename.endsWith('.gql') || filename.endsWith('.graphql')) {
+    result = gqlTransform(result);
+  }
+
+  const babelCompileResult = rnTransform({
+    src: result,
+    filename,
+    options,
+  });
+
+  // Pass the transformed source to the original react native transformer
+  return babelCompileResult;
+}
+
+module.exports.transform = transform;

package.json

@@ -1,12 +1,14 @@
 {
-  "name": "react-native-graphql-transformer",
-  "version": "1.0.0",
+  "name": "@bam.tech/react-native-graphql-transformer",
+  "version": "0.1.1",
   "description": "Transform GraphQL source files with ReactNative",
   "main": "index.js",
   "repository": "git@github.com:bamlab/react-native-graphql-transformer.git",
   "author": "Thomas Pucci",
   "license": "MIT",
   "scripts": {
+    "contributors:add": "all-contributors add",
+    "contributors:generate": "all-contributors generate",
     "lint": "eslint '**/*.{js,jsx}' --quiet",
     "format": "prettier --write '**/*.{js,jsx}'"
   },
@@ -17,6 +19,7 @@
     "graphql-tag": "^2.6.0"
   },
   "devDependencies": {
+    "all-contributors-cli": "^4.10.0",
     "eslint": "^4.13.0",
     "eslint-config-airbnb": "^16.1.0",
     "eslint-plugin-import": "^2.8.0",