Adding prefab build script

prefab_build.sh

@@ -0,0 +1,90 @@
+#!/bin/bash
+
+# Test that the prefab binary exists
+if hash prefab 2>/dev/null; then
+  echo "Prefab is installed"
+else
+  echo "Prefab binary not found. See https://github.com/google/prefab for install instructions"
+  exit 1
+fi
+
+# Get the version string from the source
+major=$(grep "#define OBOE_VERSION_MAJOR" include/oboe/Version.h | cut -d' ' -f3)
+minor=$(grep "#define OBOE_VERSION_MINOR" include/oboe/Version.h | cut -d' ' -f3)
+patch=$(grep "#define OBOE_VERSION_PATCH" include/oboe/Version.h | cut -d' ' -f3)
+version=$major"."$minor"."$patch
+
+echo "Building libraries for Oboe version "$version
+./build_all_android.sh
+
+mkdir -p build/prefab
+cp -R prefab/* build/prefab
+
+ABIS=("x86" "x86_64" "arm64-v8a" "armeabi-v7a")
+
+pushd build/prefab
+
+  # Remove .DS_Store files as these will cause the prefab verification to fail
+  find . -name ".DS_Store" -delete
+
+  # Write the version number into the various metadata files
+  mv oboe-VERSION oboe-$version
+  mv oboe-VERSION.pom oboe-$version.pom
+  sed -i '' -e "s/VERSION/${version}/g" oboe-$version.pom oboe-$version/prefab/prefab.json
+
+  # Copy the headers
+  cp -R ../../include oboe-$version/prefab/modules/oboe/
+
+  # Copy the libraries
+  for abi in ${ABIS[@]}
+  do
+    echo "Copying the ${abi} library"
+    cp -v "../${abi}/liboboe.so" "oboe-${version}/prefab/modules/oboe/libs/android.${abi}/"
+  done
+
+  # Verify the prefab packages
+  for abi in ${ABIS[@]}
+  do
+
+    prefab --build-system cmake --platform android --os-version 29 \
+        --stl c++_shared --ndk-version 21 --abi ${abi} \
+        --output prefab-output-tmp $(pwd)/oboe-${version}/prefab
+
+    result=$?; if [[ $result == 0 ]]; then
+      echo "${abi} package verified"
+    else
+      echo "${abi} package verification failed"
+      exit 1
+    fi
+  done
+
+  # Zip into an AAR and move into parent dir
+  pushd oboe-${version}
+    zip -r oboe-${version}.aar . 2>/dev/null;
+    zip -Tv oboe-${version}.aar 2>/dev/null;
+
+    # Verify that the aar contents are correct (see output below to verify)
+    result=$?; if [[ $result == 0 ]]; then
+      echo "AAR verified"
+    else
+      echo "AAR verification failed"
+      exit 1
+    fi
+
+    mv oboe-${version}.aar ..
+  popd
+
+  # Zip the .aar and .pom files into a maven package
+  zip oboe-${version}.zip oboe-${version}.* 2>/dev/null;
+  zip -Tv oboe-${version}.zip 2>/dev/null;
+
+  # Verify that the zip contents are correct (see output below to verify)
+  result=$?; if [[ $result == 0 ]]; then
+    echo "Zip verified"
+  else
+    echo "Zip verification failed"
+    exit 1
+  fi
+popd
+
+echo "Prefab zip ready for deployment: ./build/prefab/oboe-${version}.zip"