draft: test android build

.github/workflows/android-build.yml

@@ -0,0 +1,85 @@
+name: android-build
+
+permissions:
+  contents: read
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+
+concurrency:
+  group: '${{ github.workflow }}-${{ github.head_ref || github.run_id }}'
+  cancel-in-progress: true
+
+jobs:
+  check-android:
+    name: 'check android ${{ matrix.arch }}'
+    runs-on: ubuntu-24.04
+    timeout-minutes: 30
+    strategy:
+      matrix:
+        arch: [aarch64, x86_64]
+      fail-fast: false
+
+    steps:
+      - name: Configure git
+        run: |
+          git config --global core.symlinks true
+          git config --global fetch.parallel 32
+
+      - name: Clone repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 5
+          submodules: false
+
+      - name: Clone submodule ./tests/util/std
+        run: git submodule update --init --recursive --depth=1 -- ./tests/util/std
+
+      - name: Cache Cargo home
+        uses: cirruslabs/cache@v4
+        with:
+          path: |
+            ~/.cargo/.crates.toml
+            ~/.cargo/.crates2.json
+            ~/.cargo/bin
+            ~/.cargo/registry/index
+            ~/.cargo/registry/cache
+            ~/.cargo/git/db
+          key: 'cargo-home-android-${{ matrix.arch }}-${{ hashFiles(''Cargo.lock'') }}'
+          restore-keys: 'cargo-home-android-${{ matrix.arch }}-'
+
+      - uses: dsherret/rust-toolchain-file@v1
+
+      - name: Add Android targets
+        run: |
+          rustup target add ${{ matrix.arch }}-linux-android
+
+      - name: Check Android compilation
+        run: |
+          echo "Checking if Deno code compiles for Android ${{ matrix.arch }}..."
+          echo "This validates API compatibility and catches platform-specific issues."
+          echo ""
+
+          # Use cargo check which validates compilation without building binaries
+          # This is much faster than a full build and doesn't require building V8
+          cargo check --target ${{ matrix.arch }}-linux-android --locked --all-targets
+
+      - name: Report results
+        if: success()
+        run: |
+          echo "✅ Success! Deno compiles for Android ${{ matrix.arch }}"
+          echo ""
+          echo "This check validates that:"
+          echo "  - All Rust code is compatible with Android"
+          echo "  - No Linux-specific APIs are used incorrectly"
+          echo "  - Dependencies support Android targets"
+          echo ""
+          echo "Note: Full Android builds with V8 require additional infrastructure."
+          echo "See: https://github.com/termux/termux-packages/tree/master/packages/deno"