added repack-n-sign helper

Author: Eric Wheeler

repack-n-sign.sh

@@ -0,0 +1,46 @@
+#!/bin/sh
+
+BUILD_TOOLS=~/Android/Sdk/build-tools/32.0.0/
+
+if [ -z "$1" ]; then
+	echo "usage: $0 your-app.apk"
+	exit 1
+fi
+
+DIR=`mktemp -d`
+DN=`dirname "$1"`
+BN=`basename "$1"`
+OUT="$DN/repacked-$BN"
+OUT_ALIGNED="$DN/aligned-$BN"
+OUT_SIGNED="$DN/signed-$BN"
+
+# Debug mode
+set -x
+
+# Repack without the META-INF in case it was already signed
+# and flag resources.arsc as no-compress:
+unzip -q "$1" -d "$DIR"
+pushd .
+cd $DIR
+
+rm -rf "$DIR/META-INF"
+zip -n "resources.arsc" -r ../repacked.$$.apk *
+
+popd
+
+mv "$DIR/../repacked.$$.apk" "$OUT"
+
+# Align
+rm -f "$OUT_ALIGNED"
+"$BUILD_TOOLS"/zipalign -p -v 4 "$OUT" "$OUT_ALIGNED"
+
+# Verify
+"$BUILD_TOOLS"/zipalign -vc 4 "$OUT_ALIGNED"
+
+# Sign
+"$BUILD_TOOLS"/apksigner sign -verbose -ks ~/my-release-key.keystore --out "$OUT_SIGNED" "$OUT_ALIGNED"
+
+# Cleanup
+rm -rf "$DIR"
+
+echo == Done: $OUT_ALIGNED