#!/bin/sh
# Builds MiniABS.apk for Android 2.2+ (API 8) using the plain SDK tools, no Gradle.
#   ANDROID_JAR  android.jar for API 8 (compiling against it guarantees no newer APIs sneak in)
#   KEYSTORE     signing keystore (created on first build if missing)
set -e
cd "$(dirname "$0")"
ANDROID_JAR=${ANDROID_JAR:-/home/claude/sable/android-platforms/android-8/android.jar}
KEYSTORE=${KEYSTORE:-miniabs.keystore}
OUT=build

rm -rf "$OUT"
mkdir -p "$OUT/gen" "$OUT/classes"

echo "== resources"
aapt package -f -m -J "$OUT/gen" -M AndroidManifest.xml -S res -I "$ANDROID_JAR" \
    -F "$OUT/MiniABS.unsigned.apk"

echo "== compile (Java 8 bytecode, API 8 class library)"
javac -nowarn -Xlint:-options -encoding UTF-8 -source 8 -target 8 \
    -bootclasspath "$ANDROID_JAR" -classpath "$ANDROID_JAR" \
    -d "$OUT/classes" $(find src "$OUT/gen" -name '*.java')

echo "== dex"
dalvik-exchange --dex --min-sdk-version=8 --output="$OUT/classes.dex" "$OUT/classes"
(cd "$OUT" && aapt add MiniABS.unsigned.apk classes.dex > /dev/null)

echo "== align + sign (v1 JAR signature with SHA-1, which Android 2.x requires)"
if [ ! -f "$KEYSTORE" ]; then
    keytool -genkeypair -keystore "$KEYSTORE" -storepass miniabs -keypass miniabs -alias miniabs \
        -keyalg RSA -keysize 2048 -validity 10000 -dname "CN=MiniABS" > /dev/null 2>&1
fi
zipalign -f 4 "$OUT/MiniABS.unsigned.apk" "$OUT/MiniABS.aligned.apk"
apksigner sign --ks "$KEYSTORE" --ks-pass pass:miniabs --key-pass pass:miniabs --ks-key-alias miniabs \
    --min-sdk-version 8 --v1-signing-enabled true --v2-signing-enabled false --v3-signing-enabled false \
    --out "$OUT/MiniABS.apk" "$OUT/MiniABS.aligned.apk"
apksigner verify --min-sdk-version 8 "$OUT/MiniABS.apk"
ls -l "$OUT/MiniABS.apk"