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#!/usr/bin/env bash
#
# Build the Java/Android portion of btleplug (src/droidplug/java).
#
# Checks for and installs Java (via Homebrew on macOS) if necessary,
# locates the Android SDK, then runs the Gradle build.
#
set -euo pipefail
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
PROJECT_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
JAVA_DIR="$PROJECT_ROOT/src/droidplug/java"
# --- Colors (if terminal) ---------------------------------------------------
if [ -t 1 ]; then
RED='\033[0;31m'; GREEN='\033[0;32m'; YELLOW='\033[0;33m'; NC='\033[0m'
else
RED=''; GREEN=''; YELLOW=''; NC=''
fi
info() { echo -e "${GREEN}[INFO]${NC} $*"; }
warn() { echo -e "${YELLOW}[WARN]${NC} $*"; }
error() { echo -e "${RED}[ERROR]${NC} $*" >&2; }
die() { error "$@"; exit 1; }
# --- Detect OS ---------------------------------------------------------------
OS="$(uname -s)"
# --- Java --------------------------------------------------------------------
ensure_java() {
if command -v java &>/dev/null && java -version &>/dev/null 2>&1; then
local ver
ver="$(java -version 2>&1 | head -1 | sed -E 's/.*"([0-9]+).*/\1/')"
if [ "$ver" -ge 11 ] 2>/dev/null; then
info "Java $ver found: $(command -v java)"
return 0
else
warn "Java $ver found but AGP 7.4 requires Java >= 11"
fi
fi
info "Java not found or too old — attempting to install..."
case "$OS" in
Darwin)
if ! command -v brew &>/dev/null; then
die "Homebrew not found. Install it from https://brew.sh or install Java 11+ manually."
fi
info "Installing openjdk@17 via Homebrew..."
brew install openjdk@17
# Homebrew installs openjdk to its prefix; create the system symlink
# so /usr/libexec/java_home can find it. This may fail without sudo
# but we can still use it directly via JAVA_HOME.
local jdk_path
jdk_path="$(brew --prefix openjdk@17)/libexec/openjdk.jdk/Contents/Home"
if [ -d "$jdk_path" ]; then
export JAVA_HOME="$jdk_path"
export PATH="$JAVA_HOME/bin:$PATH"
else
die "openjdk@17 installed but JDK home not found at expected path."
fi
;;
Linux)
if command -v apt-get &>/dev/null; then
info "Installing openjdk-17-jdk via apt..."
sudo apt-get update -qq && sudo apt-get install -y -qq openjdk-17-jdk
elif command -v dnf &>/dev/null; then
info "Installing java-17-openjdk-devel via dnf..."
sudo dnf install -y java-17-openjdk-devel
elif command -v pacman &>/dev/null; then
info "Installing jdk17-openjdk via pacman..."
sudo pacman -S --noconfirm jdk17-openjdk
else
die "Could not detect package manager. Install Java 11+ manually."
fi
;;
*)
die "Unsupported OS '$OS'. Install Java 11+ manually."
;;
esac
# Verify
if ! command -v java &>/dev/null || ! java -version &>/dev/null 2>&1; then
die "Java installation failed or 'java' is not on PATH."
fi
info "Java installed successfully."
}
# --- JAVA_HOME ---------------------------------------------------------------
ensure_java_home() {
if [ -n "${JAVA_HOME:-}" ] && [ -d "$JAVA_HOME" ]; then
return 0
fi
case "$OS" in
Darwin)
JAVA_HOME="$(/usr/libexec/java_home 2>/dev/null || true)"
# Fallback: check Homebrew openjdk directly
if [ -z "${JAVA_HOME:-}" ] || [ ! -d "${JAVA_HOME:-}" ]; then
for v in 17 21 11; do
local brew_jdk
brew_jdk="$(brew --prefix "openjdk@$v" 2>/dev/null || true)"
if [ -n "$brew_jdk" ] && [ -d "$brew_jdk/libexec/openjdk.jdk/Contents/Home" ]; then
JAVA_HOME="$brew_jdk/libexec/openjdk.jdk/Contents/Home"
break
fi
done
fi
;;
Linux)
# Common locations
for candidate in \
/usr/lib/jvm/java-17-openjdk-amd64 \
/usr/lib/jvm/java-17-openjdk \
/usr/lib/jvm/java-17 \
/usr/lib/jvm/default-java; do
if [ -d "$candidate" ]; then
JAVA_HOME="$candidate"
break
fi
done
;;
esac
if [ -z "${JAVA_HOME:-}" ]; then
die "Could not determine JAVA_HOME. Set it manually and re-run."
fi
export JAVA_HOME
info "JAVA_HOME=$JAVA_HOME"
}
# --- Android SDK -------------------------------------------------------------
ensure_android_sdk() {
if [ -n "${ANDROID_HOME:-}" ] && [ -d "$ANDROID_HOME" ]; then
info "ANDROID_HOME=$ANDROID_HOME"
return 0
fi
# Check ANDROID_SDK_ROOT (older env var)
if [ -n "${ANDROID_SDK_ROOT:-}" ] && [ -d "$ANDROID_SDK_ROOT" ]; then
export ANDROID_HOME="$ANDROID_SDK_ROOT"
info "ANDROID_HOME=$ANDROID_HOME (from ANDROID_SDK_ROOT)"
return 0
fi
# Common default locations
local candidates=()
case "$OS" in
Darwin) candidates=("$HOME/Library/Android/sdk") ;;
Linux) candidates=("$HOME/Android/Sdk" "$HOME/android-sdk") ;;
esac
for candidate in "${candidates[@]}"; do
if [ -d "$candidate" ]; then
export ANDROID_HOME="$candidate"
info "ANDROID_HOME=$ANDROID_HOME (auto-detected)"
return 0
fi
done
die "Android SDK not found. Set ANDROID_HOME and re-run, or install via Android Studio / sdkmanager."
}
# --- Write local.properties --------------------------------------------------
write_local_properties() {
local props="$JAVA_DIR/local.properties"
# Gradle Android plugin requires sdk.dir in local.properties
echo "sdk.dir=$ANDROID_HOME" > "$props"
info "Wrote $props"
}
# --- Build -------------------------------------------------------------------
run_gradle_build() {
info "Running Gradle build in $JAVA_DIR ..."
cd "$JAVA_DIR"
if [ ! -x ./gradlew ]; then
chmod +x ./gradlew
fi
./gradlew assembleDebug assembleRelease testJar "$@"
info "Java build completed successfully."
# Copy test JAR to location expected by desktop JVM tests
local test_jar="$JAVA_DIR/build/libs/btleplug-jni.jar"
if [ -f "$test_jar" ]; then
local test_dest="$PROJECT_ROOT/target/debug/java/libs"
mkdir -p "$test_dest"
cp "$test_jar" "$test_dest/"
info "Test JAR copied to $test_dest/"
fi
}
# --- Main --------------------------------------------------------------------
main() {
info "btleplug Java/Android build"
echo
ensure_java
ensure_java_home
ensure_android_sdk
write_local_properties
echo
run_gradle_build "$@"
}
main "$@"