Add Android CI target (#367)

Co-authored-by: Steven Allen <[email protected]>

Author: Copilot

.github/workflows/ci.yml

@@ -11,6 +11,8 @@ env:
   CARGO_TARGET_WASM32_WASIP2_RUNNER: "/home/runner/.wasmtime/bin/wasmtime --dir /tmp/"
   RUSTFLAGS: "-D warnings"
   RUSTDOCFLAGS: "-D warnings"
+  NDK_VERSION: "r26d"
+  ANDROID_VERSION: "12.0.0"
 
 name: CI
 jobs:
@@ -44,6 +46,15 @@ jobs:
           - name: "MacOS"
             os: macos-latest
             target: aarch64-apple-darwin
+          - name: "Android"
+            os: ubuntu-latest
+            target: x86_64-linux-android
+        exclude:
+          - rust-version: "1.63"
+            platform:
+              name: "Android"
+              os: ubuntu-latest
+              target: x86_64-linux-android
         include:
           - rust-version: "nightly"
             test-flags: --tests
@@ -75,10 +86,50 @@ jobs:
       - name: Install Wasmtime
         if: ${{ startsWith(matrix.platform.target, 'wasm32-wasi') }}
         run: curl https://wasmtime.dev/install.sh -sSf | bash
+      - name: Setup Android Environment
+        if: ${{ contains(matrix.platform.target, 'android') }}
+        run: |
+          NDK_URL="https://dl.google.com/android/repository/android-ndk-${NDK_VERSION}-linux.zip"
+          NDK_DIR="${HOME}/android-ndk-${NDK_VERSION}"
+
+          # Download and extract NDK
+          echo "Downloading NDK from $NDK_URL"
+          wget -q "$NDK_URL" -O android-ndk.zip
+          unzip -q android-ndk.zip -d "$HOME"
+
+          # Set ANDROID_NDK_ROOT environment variable
+          echo "ANDROID_NDK_ROOT=$NDK_DIR" >> $GITHUB_ENV
+
+          # Setup & start redroid container
+          sudo apt-get install -y linux-modules-extra-$(uname -r) android-tools-adb
+          sudo modprobe binder_linux devices=binder,hwbinder,vndbinder
+
+          docker run -itd --rm --privileged \
+            --mount "type=bind,src=$(pwd),dst=/data/host$(pwd),ro" \
+            --mount "type=bind,src=/tmp,dst=/data/host/tmp,ro" \
+            --mount "type=bind,src=$(pwd)/.github/workflows/run-on-host.sh,dst=/system/xbin/run-on-host,ro" \
+            --name redroid-test \
+            -p 5555:5555 \
+            redroid/redroid:${ANDROID_VERSION}_64only-latest
+
+          # Start ADB server and connect to our redroid container
+          adb start-server
+          timeout 60 bash -c 'until adb connect localhost:5555; do sleep 2; done'
+
+          # Configure Android environment
+          echo "CARGO_TARGET_X86_64_LINUX_ANDROID_RUNNER=adb -s localhost:5555 shell run-on-host" >> $GITHUB_ENV
+          echo "CC_X86_64_linux_android=$NDK_DIR/toolchains/llvm/prebuilt/linux-x86_64/bin/x86_64-linux-android34-clang" >> $GITHUB_ENV
+          echo "AR_x86_64_linux_android=$NDK_DIR/toolchains/llvm/prebuilt/linux-x86_64/bin/llvm-ar" >> $GITHUB_ENV
+          echo "CARGO_TARGET_X86_64_LINUX_ANDROID_LINKER=$NDK_DIR/toolchains/llvm/prebuilt/linux-x86_64/bin/x86_64-linux-android34-clang" >> $GITHUB_ENV
+          echo "CARGO_TARGET_AARCH64_LINUX_ANDROID_RUSTFLAGS=-C link-arg=-Wl,--as-needed" >> $GITHUB_ENV
       - name: Build
         run: cargo build --target ${{ matrix.platform.target }} ${{ matrix.rust-version == 'nightly' && '--features nightly' || '' }}
       - name: Test
         run: cargo test --target ${{ matrix.platform.target }} ${{ matrix.rust-version == 'nightly' && '--features nightly' || '' }} ${{ matrix.test-flags }}
+      - name: Stop the redroid container
+        if: ${{ contains(matrix.platform.target, 'android') }}
+        run: |
+          docker stop redroid-test || true
   wasm:
     name: WASM Test Build
     runs-on: ubuntu-latest

.github/workflows/run-on-host.sh

@@ -0,0 +1,7 @@
+#!/system/bin/sh
+
+CMD="$1"
+shift
+
+cd /data/local/tmp || exit 1
+exec "/data/host$CMD" "$@"