Add optional --output flag to both iOS and Android build scripts

Author: Johnosezele

.gitignore

@@ -27,8 +27,9 @@ Thumbs.db
 # Native libs built locally
 libbdkffi.*
 android/libs
+bdk_demo/android/app/src/main/jniLibs
 ios/Release/
-bdk_demo/ios/ios/Release/
+bdk_demo/ios/ios/
 test_output.txt
 test output.txt
 lib/bdk.dart

lib/README.md

@@ -22,7 +22,13 @@ scripts in `scripts/`.
    ```bash
    ./scripts/build-ios-xcframework.sh
    ```
-   The framework is written to `ios/Release/bdkffi.xcframework/`.
+   The framework is written to `ios/Release/bdkffi.xcframework/`. Keep it there to
+   reuse across multiple apps, or direct the output into a Flutter project with the
+   optional flag:
+
+   ```bash
+   ./scripts/build-ios-xcframework.sh --output bdk_demo/ios/ios
+   ```
 
 ### Android (.so libraries)
 
@@ -42,12 +48,21 @@ scripts in `scripts/`.
    ```
 3. Stage the artifacts for inclusion in a Flutter project (make script executable or run with `bash`):
    ```bash
-   chmod +x scripts/build-android.sh 
+   chmod +x scripts/build-android.sh
    ./scripts/build-android.sh
-    # or
+   # or
    bash ./scripts/build-android.sh 
    ```
-   Output libraries are copied to `android/libs/<abi>/libbdkffi.so`.
+
+   By default the script stages artifacts in `android/libs/<abi>/libbdkffi.so` so the same
+   slices can be reused across multiple apps; direct them into the demo’s `jniLibs`
+   by passing `--output` as shown below. 
+
+   ```bash
+   chmod +x scripts/build-android.sh
+   ./scripts/build-android.sh --output bdk_demo/android/app/src/main/jniLibs
+   # or, without changing permissions
+   bash ./scripts/build-android.sh --output bdk_demo/android/app/src/main/jniLibs
 
 ### Desktop tests (macOS/Linux)
 

scripts/build-android.sh

@@ -4,7 +4,42 @@ set -euo pipefail
 SCRIPT_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 PROJECT_ROOT=$(cd "$SCRIPT_DIR/.." && pwd)
 ANDROID_BUILD_ROOT="$PROJECT_ROOT/build/android"
-OUTPUT_ROOT="$PROJECT_ROOT/android/libs"
+OUTPUT_ROOT="android/libs"
+
+usage() {
+    cat <<EOF
+Usage: $(basename "$0") [--output <dir>]
+
+Copy the built Android shared libraries into <dir>. When <dir> is relative,
+it is resolved from the repository root. Defaults to android/libs.
+EOF
+}
+
+while [[ $# -gt 0 ]]; do
+    case "$1" in
+        --output|-o)
+            OUTPUT_ROOT="${2:-}"
+            if [[ -z "$OUTPUT_ROOT" ]]; then
+                echo "Error: --output requires a value" >&2
+                exit 1
+            fi
+            shift 2
+            ;;
+        --help|-h)
+            usage
+            exit 0
+            ;;
+        *)
+            echo "Unknown option: $1" >&2
+            usage >&2
+            exit 1
+            ;;
+    esac
+done
+
+if [[ "$OUTPUT_ROOT" != /* ]]; then
+    OUTPUT_ROOT="$PROJECT_ROOT/$OUTPUT_ROOT"
+fi
 
 if [[ -z "${ANDROID_NDK_ROOT:-}" ]]; then
     echo "ANDROID_NDK_ROOT must be set" >&2

scripts/build-ios-xcframework.sh

@@ -4,7 +4,7 @@ set -euo pipefail
 SCRIPT_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 PROJECT_ROOT=$(cd "$SCRIPT_DIR/.." && pwd)
 IOS_BUILD_ROOT="$PROJECT_ROOT/build/ios"
-OUTPUT_ROOT="$PROJECT_ROOT/ios/Release"
+OUTPUT_ROOT="ios/Release"
 XCFRAMEWORK_NAME="bdkffi.xcframework"
 
 DEVICE_LIB="$IOS_BUILD_ROOT/aarch64-apple-ios/libbdkffi.a"
@@ -13,6 +13,42 @@ SIM_X86_LIB="$IOS_BUILD_ROOT/x86_64-apple-ios/libbdkffi.a"
 SIM_UNIVERSAL_DIR="$IOS_BUILD_ROOT/simulator-universal"
 SIM_UNIVERSAL_LIB="$SIM_UNIVERSAL_DIR/libbdkffi.a"
 
+usage() {
+    cat <<EOF
+Usage: $(basename "$0") [--output <dir>]
+
+Create an XCFramework from previously built static libraries and write it to
+<dir>. When <dir> is relative, it is resolved from the repository root.
+Defaults to ios/Release.
+EOF
+}
+
+while [[ $# -gt 0 ]]; do
+    case "$1" in
+        --output|-o)
+            OUTPUT_ROOT="${2:-}"
+            if [[ -z "$OUTPUT_ROOT" ]]; then
+                echo "Error: --output requires a value" >&2
+                exit 1
+            fi
+            shift 2
+            ;;
+        --help|-h)
+            usage
+            exit 0
+            ;;
+        *)
+            echo "Unknown option: $1" >&2
+            usage >&2
+            exit 1
+            ;;
+    esac
+done
+
+if [[ "$OUTPUT_ROOT" != /* ]]; then
+    OUTPUT_ROOT="$PROJECT_ROOT/$OUTPUT_ROOT"
+fi
+
 if [[ ! -f "$DEVICE_LIB" ]]; then
     echo "Missing device library: $DEVICE_LIB" >&2
     echo "Run scripts/generate_bindings.sh --target ios first." >&2