Explicitly opt-in to building Android module

Fixes #277

examples/ReactExample/run-android.sh

@@ -5,7 +5,8 @@ set -e
 
 PATH="/opt/android-sdk-linux/platform-tools:$PATH"
 
-npm install realm
+# Inform the prepublish script to build Android modules.
+REALM_BUILD_ANDROID=1 npm install realm
 
 adb reverse tcp:8081 tcp:8081
 

examples/ReactNativeBenchmarks/run-android.sh

@@ -5,7 +5,8 @@ set -e
 
 PATH="/opt/android-sdk-linux/platform-tools:$PATH"
 
-npm install realm
+# Inform the prepublish script to build Android modules.
+REALM_BUILD_ANDROID=1 npm install realm
 
 adb reverse tcp:8081 tcp:8081
 

scripts/prepublish.sh

@@ -5,9 +5,7 @@ set -o pipefail
 
 cd "$(dirname "$0")/.."
 
-if [ -n "$SKIP_ANDROID_BUILD" -o -n "$XCODE_VERSION_ACTUAL" ]; then
-  echo 'Skipped building Android module'
-else
+if [ -n "$REALM_BUILD_ANDROID" ]; then
   rm -rf android
   (cd react-native/android && ./gradlew publishAndroid)
 fi

scripts/test.sh

@@ -12,7 +12,10 @@ SRCROOT=$(cd "$(dirname "$0")/.." && pwd)
 # Start current working directory at the root of the project.
 cd "$SRCROOT"
 
-if [[ $TARGET != *-android ]]; then
+if [[ $TARGET = *-android ]]; then
+  # Inform the prepublish script to build Android modules.
+  export REALM_BUILD_ANDROID=1
+else
   while pgrep -q Simulator; do
     # Kill all the current simulator processes as they may be from a
     # different Xcode version
@@ -22,9 +25,6 @@ if [[ $TARGET != *-android ]]; then
   done
 
   DESTINATION="-destination id=$(xcrun simctl list devices | grep -v unavailable | grep -m 1 -o '[0-9A-F\-]\{36\}')"
-
-  # Inform the prepublish script to skip building Android modules.
-  export SKIP_ANDROID_BUILD=1
 fi
 
 PACKAGER_OUT="$SRCROOT/packager_out.txt"

tests/react-test-app/run-android.sh

@@ -5,7 +5,8 @@ set -e
 
 PATH="/opt/android-sdk-linux/platform-tools:$PATH"
 
-npm install realm realm-tests
+# Inform the prepublish script to build Android modules.
+REALM_BUILD_ANDROID=1 npm install realm realm-tests
 
 cp ../../src/object-store/tests/query.json node_modules/realm-tests/query-tests.json