chore: Build mobile applications in CI

.cargo/config.toml

@@ -1,3 +1,4 @@
 [alias]
 xtask = "run -p xtask --bin xtask --"
 uniffi-bindgen = "run -p uniffi-bindgen --"
+uniffi-bindgen-swift = "run -p uniffi-bindgen-swift --"

.github/workflows/ci.yml

@@ -69,9 +69,121 @@ jobs:
       - run: npm --workspaces run format
 
   bindings:
-    runs-on: macos-latest
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
       - uses: Swatinem/rust-cache@v2
-      - run: rustup target add aarch64-apple-ios aarch64-apple-ios-sim
       - run: cargo xtask generate-bindings
+      - uses: actions/upload-artifact@v4
+        with:
+          name: ios-bindings
+          path: packages/app-mobile/ios/uniffi/
+      - uses: actions/upload-artifact@v4
+        with:
+          name: android-bindings
+          path: packages/app-mobile/android/src/main/java/uniffi/
+
+  build-ios:
+    if: false
+    runs-on: macos-26
+    needs: bindings
+    steps:
+      - uses: actions/checkout@v4
+      - uses: Swatinem/rust-cache@v2
+      - run: rustup target add aarch64-apple-ios aarch64-apple-ios-sim
+      - uses: actions/download-artifact@v4
+        with:
+          name: ios-bindings
+          path: packages/app-mobile/ios/uniffi/
+      - run: cargo xtask build-ios
+      - uses: actions/setup-node@v4
+        with:
+          node-version-file: .node-version
+          cache: npm
+      - run: npm ci
+      - name: Cache CocoaPods
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/Library/Caches/CocoaPods
+            ~/.cocoapods
+          key: pods-${{ runner.os }}-${{ github.ref_name }}
+          restore-keys: |
+            pods-${{ runner.os }}-main
+            pods-${{ runner.os }}-
+      - name: Cache iOS prebuild
+        uses: actions/cache@v4
+        with:
+          path: packages/app-mobile/example/ios
+          key: prebuild-ios-${{ runner.os }}-${{ hashFiles('packages/app-mobile/ios/AppMobile.podspec', 'packages/app-mobile/example/app.json', 'packages/app-mobile/example/package.json') }}-${{ github.sha }}
+          restore-keys: |
+            prebuild-ios-${{ runner.os }}-${{ hashFiles('packages/app-mobile/ios/AppMobile.podspec', 'packages/app-mobile/example/app.json', 'packages/app-mobile/example/package.json') }}-
+      - name: Prebuild
+        working-directory: packages/app-mobile/example
+        run: npx expo prebuild -p ios
+      - name: Build iOS simulator app
+        working-directory: packages/app-mobile/example
+        run: |
+          xcodebuild \
+            -workspace ios/appmobileexample.xcworkspace \
+            -scheme appmobileexample \
+            -configuration Release \
+            -sdk iphonesimulator \
+            -arch arm64 \
+            -derivedDataPath ios/build \
+            -parallelizeTargets \
+            -quiet \
+            CODE_SIGNING_ALLOWED=NO
+      - name: Package .app
+        working-directory: packages/app-mobile/example
+        run: |
+          mkdir -p artifact
+          cp -r ios/build/Build/Products/Release-iphonesimulator/appmobileexample.app artifact/
+          cd artifact && zip -r appmobileexample.zip appmobileexample.app
+      - uses: actions/upload-artifact@v4
+        with:
+          name: appmobileexample-ios-simulator
+          path: packages/app-mobile/example/artifact/appmobileexample.zip
+
+  build-android:
+    runs-on: ubuntu-latest
+    needs: bindings
+    steps:
+      - uses: actions/checkout@v4
+      - uses: Swatinem/rust-cache@v2
+      - uses: taiki-e/install-action@v2
+        with:
+          tool: cargo-ndk
+      - run: >-
+          rustup target add
+          aarch64-linux-android
+          armv7-linux-androideabi
+          x86_64-linux-android
+          i686-linux-android
+      - uses: actions/download-artifact@v4
+        with:
+          name: android-bindings
+          path: packages/app-mobile/android/src/main/java/uniffi/
+      - run: cargo xtask build-android
+      - uses: actions/setup-node@v4
+        with:
+          node-version-file: .node-version
+          cache: npm
+      - run: npm ci
+      - uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 17
+      - uses: gradle/actions/setup-gradle@v4
+        with:
+          cache-read-only: false
+      - name: Prebuild
+        working-directory: packages/app-mobile/example
+        run: npx expo prebuild -p android
+      - name: Build Android APK
+        working-directory: packages/app-mobile/example/android
+        run: ./gradlew assembleDebug
+      - uses: actions/upload-artifact@v4
+        with:
+          name: appmobileexample-android
+          path: packages/app-mobile/example/android/app/build/outputs/apk/debug/app-debug.apk

.gitignore

@@ -9,6 +9,7 @@ target/
 
 ### Generated bindings ###
 packages/app-mobile/ios/uniffi/
+packages/app-mobile/ios/AppMobile.xcframework/
 packages/app-mobile/android/src/main/java/uniffi/
 
 .vscode

Cargo.toml

@@ -6,6 +6,7 @@ members = [
     "crates/app-mobile",
     "crates/app-web",
     "tools/uniffi-bindgen",
+    "tools/uniffi-bindgen-swift",
     "xtask",
 ]
 default-members = [

crates/app-mobile/Cargo.toml

@@ -5,7 +5,7 @@ edition.workspace = true
 rust-version.workspace = true
 
 [lib]
-crate-type = ["cdylib", "staticlib", "lib"]
+crate-type = ["cdylib", "staticlib"]
 
 [dependencies]
 app-core.workspace = true

justfile

@@ -1,5 +1,6 @@
 setup:
     rustup target add aarch64-apple-ios aarch64-apple-ios-sim
+    rustup target add aarch64-linux-android armv7-linux-androideabi x86_64-linux-android i686-linux-android
 
 run *args:
     cargo run -p server {{ args }}
@@ -16,3 +17,6 @@ verify-js:
 
 generate-bindings:
     cargo xtask generate-bindings
+
+build-android:
+    cargo xtask build-android

packages/app-mobile/android/build.gradle

@@ -16,3 +16,7 @@ android {
     abortOnError false
   }
 }
+
+dependencies {
+  implementation "net.java.dev.jna:jna:5.18.1@aar"
+}

packages/app-mobile/android/src/main/java/expo/modules/appmobile/AppMobileModule.kt

@@ -1,5 +1,6 @@
 package expo.modules.appmobile
 
+import expo.modules.kotlin.functions.Coroutine
 import expo.modules.kotlin.modules.Module
 import expo.modules.kotlin.modules.ModuleDefinition
 import uniffi.app_mobile.BackgroundTaskCallback
@@ -33,7 +34,7 @@ class AppMobileModule : Module() {
       divide(left.toULong(), right.toULong())?.toLong()
     }
 
-    AsyncFunction("delayedAdd") { left: Long, right: Long, delayMs: Long ->
+    AsyncFunction("delayedAdd") Coroutine { left: Long, right: Long, delayMs: Long ->
       delayedAdd(left.toULong(), right.toULong(), delayMs.toULong()).toLong()
     }
 

packages/app-mobile/ios/AppMobile.podspec

@@ -25,6 +25,9 @@ Pod::Spec.new do |s|
     'DEFINES_MODULE' => 'YES',
   }
 
-  s.source_files = "**/*.{h,m,mm,swift,hpp,cpp}"
-  s.vendored_frameworks = "uniffi/AppMobile.xcframework"
+  s.source_files = [
+    "*.swift",
+    "uniffi/**/*.{swift,h}"
+  ]
+  s.vendored_frameworks = "AppMobile.xcframework"
 end

packages/app-mobile/ios/AppMobileModule.swift

@@ -33,17 +33,21 @@ public class AppMobileModule: Module {
     Function("stopBackgroundTask") {
       stopBackgroundTask()
     }
+
+    OnDestroy {
+      stopBackgroundTask()
+    }
   }
 }
 
-class AppMobileBackgroundCallback: BackgroundTaskCallback {
-  private weak var module: AppMobileModule?
+final class AppMobileBackgroundCallback: BackgroundTaskCallback {
+  nonisolated(unsafe) private let module: AppMobileModule
 
   init(module: AppMobileModule) {
     self.module = module
   }
 
   func onTick(count: UInt64) {
-    module?.sendEvent("onTick", ["count": Int(count)])
+    module.sendEvent("onTick", ["count": Int(count)])
   }
 }

tools/uniffi-bindgen-swift/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "uniffi-bindgen-swift"
+version.workspace = true
+edition.workspace = true
+rust-version.workspace = true
+
+[dependencies]
+uniffi = { workspace = true, features = ["cli"] }
+
+[lints]
+workspace = true

tools/uniffi-bindgen-swift/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    uniffi::uniffi_bindgen_swift();
+}