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fix(build): patch unsigned APK directly instead of re-running Gradle

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The previous fix re-ran ./gradlew assembleUniversalRelease to include
the missing frontend assets, but BuildTask.kt calls
`cargo tauri android android-studio-script` which requires the full
Tauri CLI build environment — it fails immediately when invoked
standalone.

New approach: inject the dist/ files directly into the unsigned APK
(which is a ZIP file) using `zip -r`. The existing zipalign + apksigner
step re-aligns and signs the result, producing a valid APK. No extra
Gradle invocation needed.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Siavash Sameni
2026-05-25 09:56:42 +04:00
parent 2b93bd4b45
commit 0f93a2b745
1 changed files with 21 additions and 14 deletions
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35
scripts/build-tauri-android.sh
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@@ -322,21 +322,28 @@ for ARCH in $ARCHS; do
cargo tauri android build ${PROFILE_FLAG} --target "$TARGET" --apk cargo tauri android build ${PROFILE_FLAG} --target "$TARGET" --apk
# ─── Workaround: Tauri CLI 2.10.x does not copy frontendDist to the # ─── Workaround: Tauri CLI 2.10.x does not copy frontendDist to the
# Android assets folder (gen/android/app/src/main/assets/). The Rust # Android assets folder. The Rust build step writes tauri.conf.json
# build step writes tauri.conf.json there correctly, but index.html # there correctly, but index.html and the JS/CSS assets are never
# and the JS/CSS assets are never transferred, causing the WebView to # transferred, causing the WebView to fail with "Asset not found:
# fail with "Asset not found: index.html" at runtime. # index.html" at runtime.
# #
# Fix: copy dist/ into the assets folder and re-run Gradle so the APK # Fix: inject the missing files directly into the unsigned APK (which
# picks up the frontend. Gradle is incremental here (no Java/Kotlin # is just a ZIP file). The existing zipalign + apksigner step below
# changed) so this extra pass takes < 30s. # handles realignment and signing, so this produces a valid APK.
ANDROID_ASSETS="gen/android/app/src/main/assets" # Re-running Gradle is NOT used here because the Gradle Rust build
if [ ! -f "$ANDROID_ASSETS/index.html" ]; then # task (BuildTask.kt) calls `cargo tauri android android-studio-script`
echo ">>> frontend assets missing from Android project — copying dist/ and repackaging" # which requires the full Tauri CLI environment and fails standalone.
mkdir -p "$ANDROID_ASSETS" UNSIGNED_APK_PATH="gen/android/app/build/outputs/apk/universal/release/app-universal-release-unsigned.apk"
cp -r /build/source/desktop/dist/. "$ANDROID_ASSETS/" if [ -f "$UNSIGNED_APK_PATH" ] && ! unzip -l "$UNSIGNED_APK_PATH" 2>/dev/null | grep -q "assets/index.html"; then
echo ">>> re-running Gradle assembleUniversalRelease" echo ">>> frontend assets missing from APK — patching unsigned APK directly"
(cd gen/android && ./gradlew assembleUniversalRelease 2>&1 | tail -15) PATCH_DIR="/tmp/apk-frontend-patch-$$"
rm -rf "$PATCH_DIR"
mkdir -p "$PATCH_DIR/assets"
cp -r /build/source/desktop/dist/. "$PATCH_DIR/assets/"
(cd "$PATCH_DIR" && zip -r /build/source/desktop/src-tauri/"$UNSIGNED_APK_PATH" assets/)
rm -rf "$PATCH_DIR"
echo ">>> APK patched: $(ls -lh "$UNSIGNED_APK_PATH" | awk '{print $5}')"
echo ">>> assets in APK: $(unzip -l "$UNSIGNED_APK_PATH" | grep 'assets/' | wc -l) entries"
fi fi
# Copy produced APK with arch suffix # Copy produced APK with arch suffix