CI: Add iOS build on GitHub Actions

.github/workflows/ios_builds.yml

@@ -0,0 +1,50 @@
+name: iOS Builds
+on: [push, pull_request]
+
+# Global Cache Settings
+env:
+  GODOT_BASE_BRANCH: master
+  SCONS_CACHE_LIMIT: 4096
+
+jobs:
+  ios-template:
+    runs-on: "macos-latest"
+    name: Template (target=release, tools=no)
+
+    steps:
+      - uses: actions/checkout@v2
+
+      # Upload cache on completion and check it out now
+      - name: Load .scons_cache directory
+        id: ios-template-cache
+        uses: actions/cache@v2
+        with:
+          path: ${{github.workspace}}/.scons_cache/
+          key: ${{github.job}}-${{env.GODOT_BASE_BRANCH}}-${{github.ref}}-${{github.sha}}
+          restore-keys: |
+            ${{github.job}}-${{env.GODOT_BASE_BRANCH}}-${{github.ref}}-${{github.sha}}
+            ${{github.job}}-${{env.GODOT_BASE_BRANCH}}-${{github.ref}}
+            ${{github.job}}-${{env.GODOT_BASE_BRANCH}}
+
+      # Use python 3.x release (works cross platform)
+      - name: Set up Python 3.x
+        uses: actions/setup-python@v2
+        with:
+          # Semantic version range syntax or exact version of a Python version
+          python-version: '3.x'
+          # Optional - x64 or x86 architecture, defaults to x64
+          architecture: 'x64'
+
+      # You can test your matrix by printing the current Python version
+      - name: Configuring Python packages
+        run: |
+          python -c "import sys; print(sys.version)"
+          python -m pip install scons
+          python --version
+          scons --version
+
+      - name: Compilation
+        env:
+          SCONS_CACHE: ${{github.workspace}}/.scons_cache/
+        run: |
+          scons -j2 verbose=yes warnings=all werror=yes platform=iphone target=release tools=no

.github/workflows/macos_builds.yml

@@ -1,4 +1,4 @@
-name: MacOS Builds
+name: macOS Builds
 on: [push, pull_request]
 
 # Global Cache Settings