#!/bin/bash
# Builds Minamp.apk for Android 2.2+ without the Android SDK/Gradle:
# aapt2 (resources) -> javac (Java 8 bytecode vs android-8 API) -> dx (dex 035) -> jarsigner (v1/SHA-1) -> zipalign.
set -euo pipefail
cd "$(dirname "$0")"
T=${TOOLS:-$PWD/toolchain}
ANDROID_JAR=$T/platforms/android-8/android.jar
BC_SRC=$T/bcsrc
OUT=build
rm -rf $OUT && mkdir -p $OUT/res $OUT/gen $OUT/classes

echo "== resources"
$T/aapt2 compile --dir res -o $OUT/res/compiled.zip
$T/aapt2 link -o $OUT/base.apk -I $ANDROID_JAR --manifest AndroidManifest.xml \
  --java $OUT/gen -A assets --min-sdk-version 8 --target-sdk-version 10 \
  --no-version-vectors $OUT/res/compiled.zip

echo "== java"
find src $OUT/gen -name '*.java' > $OUT/sources.txt
javac -nowarn -Xlint:-options -source 8 -target 8 -encoding UTF-8 -g:source,lines \
  -bootclasspath $ANDROID_JAR -sourcepath "src:$BC_SRC:$OUT/gen" \
  -d $OUT/classes @$OUT/sources.txt 2>&1 | grep -v -E '^Picked up|^Note:' || true
test -f $OUT/classes/com/minamp/HomeActivity.class

echo "== dex"
java -Xmx2g -jar $T/dx.jar --dex --output=$OUT/classes.dex $OUT/classes 2>&1 | grep -v '^Picked up' || true

echo "== package"
cp $OUT/base.apk $OUT/unsigned.apk
(cd $OUT && zip -q unsigned.apk classes.dex)
jarsigner -keystore ${KEYSTORE:-$T/minamp.keystore} -storepass minamp123 -keypass minamp123 \
  -digestalg SHA-1 -sigalg SHA1withRSA -signedjar $OUT/signed.apk $OUT/unsigned.apk minamp 2>&1 \
  | grep -v -E '^Picked up|^$|Warning|risk|self-signed|POSIX|ignored when signing|not protected' || true
python3 tools/zipalign.py $OUT/signed.apk $OUT/Minamp.apk
ls -la $OUT/Minamp.apk