Validate that JS and Native code versions match for RN releases

Summary:
Basic implementation of the proposal in #15271

Note that this should not affect facebook internally since they are not using OSS releases.

Points to consider:
- How strict should the version match be, right now I just match exact versions.
- Wasn't able to use haste for ReactNativeVersion because I was getting duplicate module provider caused by the template file in scripts/versiontemplates. I tried adding the scripts folder to modulePathIgnorePatterns in package.json but that didn't help.
- Redscreen vs. warning, I think warning is useless because if the app crashes you won't have time to see the warning.
- Should the check and native modules be __DEV__ only?

**Test plan**
Tested that it works when version match and that it redscreens when versions don't before getting other errors on Android and iOS.
Closes https://github.com/facebook/react-native/pull/15518

Differential Revision: D5813551

Pulled By: hramos

fbshipit-source-id: 901757e25724b0f22bf39de172b56309d0dd5a95

scripts/bump-oss-version.js

@@ -46,10 +46,39 @@ let versionMajor = branch.slice(0, branch.indexOf(`-stable`));
 // e.g. 0.33.1 or 0.33.0-rc4
 let version = argv._[0];
 if (!version || version.indexOf(versionMajor) !== 0) {
-  echo(`You must pass a tag like ${versionMajor}.[X]-rc[Y] to bump a version`);
+  echo(`You must pass a tag like 0.${versionMajor}.[X]-rc[Y] to bump a version`);
   exit(1);
 }
 
+// Generate version files to detect mismatches between JS and native.
+let match = version.match(/^(\d+)\.(\d+)\.(\d+)(?:-(.+))?$/);
+if (!match) {
+  echo(`You must pass a correctly formatted version; couldn't parse ${version}`);
+  exit(1);
+}
+let [, major, minor, patch, prerelease] = match;
+
+cat('scripts/versiontemplates/ReactNativeVersion.java.template')
+  .replace('${major}', major)
+  .replace('${minor}', minor)
+  .replace('${patch}', patch)
+  .replace('${prerelease}', prerelease !== undefined ? `"${prerelease}"` : 'null')
+  .to('ReactAndroid/src/main/java/com/facebook/react/modules/systeminfo/ReactNativeVersion.java');
+
+cat('scripts/versiontemplates/RCTVersion.h.template')
+  .replace('${major}', `@(${major})`)
+  .replace('${minor}', `@(${minor})`)
+  .replace('${patch}', `@(${patch})`)
+  .replace('${prerelease}', prerelease !== undefined ? `@"${prerelease}"` : '[NSNull null]')
+  .to('React/Base/RCTVersion.h');
+
+cat('scripts/versiontemplates/ReactNativeVersion.js.template')
+  .replace('${major}', major)
+  .replace('${minor}', minor)
+  .replace('${patch}', patch)
+  .replace('${prerelease}', prerelease !== undefined ? `'${prerelease}'` : 'null')
+  .to('Libraries/Core/ReactNativeVersion.js');
+
 let packageJson = JSON.parse(cat(`package.json`));
 packageJson.version = version;
 JSON.stringify(packageJson, null, 2).to(`package.json`);

scripts/versiontemplates/RCTVersion.h.template

@@ -0,0 +1,17 @@
+/**
+ * @generated by scripts/bump-oss-version.js
+ *
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+#define REACT_NATIVE_VERSION @{ \
+  @"major": ${major}, \
+  @"minor": ${minor}, \
+  @"patch": ${patch}, \
+  @"prerelease": ${prerelease}, \
+}

scripts/versiontemplates/ReactNativeVersion.java.template

@@ -0,0 +1,24 @@
+/**
+ * @generated by scripts/bump-oss-version.js
+ *
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+package com.facebook.react.modules.systeminfo;
+
+import com.facebook.react.common.MapBuilder;
+
+import java.util.Map;
+
+public class ReactNativeVersion {
+  public static final Map<String, Object> VERSION = MapBuilder.<String, Object>of(
+      "major", ${major},
+      "minor", ${minor},
+      "patch", ${patch},
+      "prerelease", ${prerelease});
+}

scripts/versiontemplates/ReactNativeVersion.js.template

@@ -0,0 +1,20 @@
+/**
+ * @generated by scripts/bump-oss-version.js
+ *
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * @flow
+ * @providesModule ReactNativeVersion
+ */
+
+exports.version = {
+  major: ${major},
+  minor: ${minor},
+  patch: ${patch},
+  prerelease: ${prerelease},
+};