An initial xcode setup for using xcode (#539)

An example of bevy using xcode

.github/workflows/ios.yml

@@ -0,0 +1,36 @@
+name: iOS cron CI
+
+on:
+  schedule:
+    - cron:  '0 0 * * *'
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  build:
+    runs-on: macOS-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+
+      - uses: actions/cache@v2
+        with:
+          path: |
+            target
+          key: ${{ runner.os }}-cargo-check-test-${{ matrix.toolchain }}-${{ hashFiles('**/Cargo.lock') }}
+
+      - uses: actions-rs/[email protected]
+        with:
+          crate: cargo-lipo
+          version: latest
+
+      - name: Add iOS targets
+        run: rustup target add aarch64-apple-ios x86_64-apple-ios
+
+      - name: Build and install iOS app in iOS Simulator.
+        run: cd examples/ios && make install

Cargo.toml

@@ -51,7 +51,7 @@ wayland = ["bevy_winit/wayland"]
 x11 = ["bevy_winit/x11"]
 
 [workspace]
-members = ["crates/*", "crates/bevy_ecs/hecs"]
+members = ["crates/*", "crates/bevy_ecs/hecs", "examples/ios"]
 exclude = ["benches"]
 
 [dependencies]

README.md

@@ -4,6 +4,7 @@
 [![license](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/bevyengine/bevy/blob/master/LICENSE)
 [![Crates.io](https://img.shields.io/crates/d/bevy.svg)](https://crates.io/crates/bevy)
 [![Rust](https://github.com/bevyengine/bevy/workflows/CI/badge.svg)](https://github.com/bevyengine/bevy/actions)
+![iOS cron CI](https://github.com/bevyengine/bevy/workflows/iOS%20cron%20CI/badge.svg)
 
 ## What is Bevy?
 

crates/bevy_render/Cargo.toml

@@ -51,7 +51,7 @@ spirv-reflect = "0.2.3"
 bevy-glsl-to-spirv = "0.1.7"
 
 [target.'cfg(target_os = "ios")'.dependencies]
-shaderc = "0.6.2"
+shaderc = "0.6.3"
 
 [features]
 png = ["image/png"]

examples/README.md

@@ -136,3 +136,36 @@ to point to the correct `.js` file.
 Then serve `examples/wasm` dir to browser. i.e.
 
     $ basic-http-server examples/wasm
+
+## iOS
+
+#### pre-req
+
+    $ rustup target add aarch64-apple-ios x86_64-apple-ios
+    $ cargo install cargo-lipo
+
+#### build & run
+
+Using bash:
+    $ cd examples/ios
+    $ make run
+
+In an ideal world, this will boot up, install and run the app for the first
+iOS simulator in your `xcrun simctl devices list`. If this fails, you can
+specify the simulator device UUID via:
+    $ DEVICE_ID=${YOUR_DEVICE_ID} make run
+
+If you'd like to see xcode do stuff, you can run
+    $ open bevy_ios_example.xcodeproj/
+
+which will open xcode. You then must push the zoom zoom play button and wait
+for the magic.
+
+The Xcode build GUI will by default build the rust library for both
+`x86_64-apple-ios`, and `aarch64-apple-ios` which may take a while. If you'd
+like speed this up, you update the `IOS_TARGETS` User-Defined environment
+variable in the "`cargo_ios` target" to be either `x86_64-apple-ios` or
+`aarch64-applo-ios` depending on your goal.
+
+Note: if you update this variable in Xcode, it will also change the default
+used for the `Makefile`.

examples/ios/.gitignore

@@ -0,0 +1 @@
+/build

examples/ios/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "bevy-ios-example"
+version = "0.1.0"
+authors = ["Sebastian Imlay <[email protected]>"]
+edition = "2018"
+
+[lib]
+name = "bevy_ios_example"
+crate-type = ["staticlib"]
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+bevy = { path = "../../", features = [ "bevy_gilrs", "bevy_gltf", "bevy_wgpu", "bevy_winit", "render", "png", "hdr"], default-features = false}

examples/ios/Makefile

@@ -0,0 +1,25 @@
+.PHONY: xcodebuild run install boot-sim generate clean
+
+DEVICE = ${DEVICE_ID}
+ifndef DEVICE_ID
+	DEVICE=$(shell xcrun simctl list devices 'iOS' | grep -v 'unavailable' | grep -v '^--' | grep -v '==' | head -n 1 | cut -d ' ' -f 7 | sed 's/[()]//g')
+endif
+
+run: install
+	xcrun simctl launch --console $(DEVICE) com.rust.bevy-ios-example
+
+boot-sim:
+	xcrun simctl boot $(DEVICE) || true
+
+install: xcodebuild-simulator boot-sim
+	 xcrun simctl install $(DEVICE) build/Build/Products/Debug-iphonesimulator/bevy_ios_example.app
+
+xcodebuild-simulator:
+	IOS_TARGETS=x86_64-apple-ios xcodebuild -scheme bevy_ios_example -configuration Debug -derivedDataPath build -destination "id=$(DEVICE)"
+
+xcodebuild-iphone:
+	IOS_TARGETS=aarch64-apple-ios xcodebuild -scheme bevy_ios_example -configuration Debug -derivedDataPath build -arch arm64
+
+clean:
+	rm -r build
+	cargo clean

examples/ios/bevy_ios_example.xcodeproj/.gitignore

@@ -0,0 +1,2 @@
+xcuserdata
+project.xcworkspace