chore: don't apply RN config automatically

packages/cli/src/tools/config/__tests__/__snapshots__/index-test.js.snap

@@ -83,6 +83,15 @@ Object {
 }
 `;
 
+exports[`should not add default React Native config when one present 1`] = `
+Array [
+  Object {
+    "func": [Function],
+    "name": "test",
+  },
+]
+`;
+
 exports[`should read \`rnpm\` config from a dependency and transform it to a new format 1`] = `
 Object {
   "assets": Array [],

packages/cli/src/tools/config/__tests__/index-test.js

@@ -217,3 +217,22 @@ test('should automatically put "react-native" into haste config', () => {
   const {haste} = loadConfig(DIR);
   expect(haste).toMatchSnapshot();
 });
+
+test('should not add default React Native config when one present', () => {
+  writeFiles(DIR, {
+    'node_modules/react-native/package.json': '{}',
+    'node_modules/react-native/react-native.config.js': `module.exports = {
+      commands: [{
+        name: 'test',
+        func: () => {},
+      }]
+    }`,
+    'package.json': `{
+      "dependencies": {
+        "react-native": "0.0.1"
+      }
+    }`,
+  });
+  const {commands} = loadConfig(DIR);
+  expect(commands).toMatchSnapshot();
+});

packages/cli/src/tools/config/index.js

@@ -38,10 +38,18 @@ function loadConfig(projectRoot: string = process.cwd()): ConfigT {
         readLegacyDependencyConfigFromDisk(root) ||
         readDependencyConfigFromDisk(root);
 
-      // @todo: Move this to React Native in the future
+      /**
+       * This workaround is neccessary for development only before
+       * first 0.60.0-rc.0 gets released and we can switch to it
+       * while testing.
+       */
       if (dependencyName === 'react-native') {
-        config.platforms = {ios, android};
-        config.commands = [...ios.commands, ...android.commands];
+        if (Object.keys(config.platforms).length === 0) {
+          config.platforms = {ios, android};
+        }
+        if (config.commands.length === 0) {
+          config.commands = [...ios.commands, ...android.commands];
+        }
       }
 
       const isPlatform = Object.keys(config.platforms).length > 0;