PR builds and binary package builds for releases (#45)

The main change here is to update publish.yml to now prep the environment for building source code, and then actually building the source using gulp, and finally publishing the binary package (instead of the source package). I've already created a release to test the full flow and the created package (https://www.npmjs.com/package/@babylonjs/react-native). I have one more package being built and published now, which updates the README.md to remove the steps that are no longer needed since the source is pre-compiled.

- Update publish.yml to install Ninja, do a Yarn install on the Playground app (since we build it to produce the libBabylonNative.so files for Android), do a NPM install in the Package directory (to install a few tools and libraries needed for the Gulp build), then actually run the Gulp build, and finally publish the pre-compiled package instead of the source package.
- Update the build.gradle files to switch to a different version of the NDK which is pre-installed on GitHub build agents (and update the associated documentation).
- Update the package README.md to remove the steps that are no longer necessary with the pre-compiled package.

Additionally, since building the code is now relatively trivial, I am also adding pr.yml to facilitate gated PR builds. This duplicates steps from publish.yml as there doesn't seem to be any way to share a set of steps across jobs with GitHub Actions/Workflows, but the steps are really simple so meh.

Author: ryantrem

.github/workflows/pr.yml

@@ -0,0 +1,42 @@
+name: PR Build
+on:
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  build-android:
+    runs-on: macos-latest
+    steps:
+      - name: Checkout Repo
+        uses: actions/[email protected]
+        with:
+          submodules: 'recursive'
+      - name: Setup Ninja
+        run: brew install ninja
+      - name: Yarn Install (Playground)
+        run: yarn install
+        working-directory: ./Apps/Playground
+      - name: NPM Install (Binary Package)
+        run: npm install
+        working-directory: ./Package
+      - name: Gulp (Android)
+        run: npx gulp buildAndroid
+        working-directory: ./Package
+
+  build-iOS:
+    runs-on: macos-latest
+    steps:
+      - name: Checkout Repo
+        uses: actions/[email protected]
+        with:
+          submodules: 'recursive'
+      - name: Yarn Install (Playground)
+        run: yarn install
+        working-directory: ./Apps/Playground
+      - name: NPM Install (Binary Package)
+        run: npm install
+        working-directory: ./Package
+      - name: Gulp (iOS)
+        run: npx gulp buildIOS
+        working-directory: ./Package

.github/workflows/publish.yml

@@ -5,14 +5,25 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: macos-latest
     steps:
       - name: Checkout Repo
-        uses: actions/[email protected]
-      - name: Checkout Submodules
-        uses: textbook/[email protected]
+        uses: actions/[email protected]
+        with:
+          submodules: 'recursive'
+      - name: Setup Ninja
+        run: brew install ninja
+      - name: Yarn Install (Playground)
+        run: yarn install
+        working-directory: ./Apps/Playground
+      - name: NPM Install (Binary Package)
+        run: npm install
+        working-directory: ./Package
+      - name: Gulp
+        run: npx gulp
+        working-directory: ./Package
       - name: Setup Node.js
-        uses: actions/setup-node@v1.4.2
+        uses: actions/setup-node@v2.1.0
         with:
           node-version: '12.x'
           registry-url: 'https://registry.npmjs.org'
@@ -21,6 +32,6 @@ jobs:
         run: |
           npm version --no-git-tag-version ${GITHUB_REF/refs\/tags\//}
           npm publish --access public
-        working-directory: ./Apps/Playground/node_modules/@babylonjs/react-native
+        working-directory: ./Package/Assembled
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

Apps/Playground/android/build.gradle

@@ -6,7 +6,7 @@ buildscript {
         minSdkVersion = 18
         compileSdkVersion = 28
         targetSdkVersion = 28
-        ndkVersion = "21.0.6113669"
+        ndkVersion = "21.3.6528147"
     }
     repositories {
         google()

Apps/Playground/node_modules/@babylonjs/react-native/README.md

@@ -52,7 +52,7 @@ pod install --repo-update
 
 ### **Configuring a Mac Dev Environment**
 
-**Required Tools:** [Android Studio](https://developer.android.com/studio/) (including NDK 21.0.6113669), [CMake](https://cmake.org/), [Ninja](https://ninja-build.org/)
+**Required Tools:** [Android Studio](https://developer.android.com/studio/) (including NDK 21.3.6528147), [CMake](https://cmake.org/), [Ninja](https://ninja-build.org/)
 
 - The `PATH` environment variable must include the path to adb (typically ~/Library/Android/sdk/platform-tools/).
 - The `PATH` environment variable must include the path to Ninja, or Ninja must be [installed via a package manager](https://github.com/ninja-build/ninja/wiki/Pre-built-Ninja-packages).
@@ -72,7 +72,7 @@ export ANDROID_AVD_HOME=~/.android/avd
 
 ### **Configuring a Windows Dev Environment**
 
-**Required Tools:** [Android Studio](https://developer.android.com/studio/) (including NDK 21.0.6113669), [CMake](https://cmake.org/), [Ninja](https://ninja-build.org/)
+**Required Tools:** [Android Studio](https://developer.android.com/studio/) (including NDK 21.3.6528147), [CMake](https://cmake.org/), [Ninja](https://ninja-build.org/)
 
 - The `PATH` environment variable must include the path to adb (typically %LOCALAPPDATA%/Android/sdk/platform-tools/).
 - The `PATH` environment variable must include the path to Ninja, or Ninja must be [installed via a package manager](https://github.com/ninja-build/ninja/wiki/Pre-built-Ninja-packages).