Makefile for unpacking and repacking apk

.gitignore

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+apk.out/
+dist/
+dll/
+
+original.apk
+
+debug-cert.pem
+debug-key.pk8

CHECKSUMS.sha256

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+12dc636b2d9e2f6a75d28fc15a3d98ef6ec43f3f95a8710b8aba1ceae29efccd  original.apk

Makefile

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+all: dist/signed.apk
+
+.PHONY: all clean install unpack
+
+APK_DIR=apk.out/
+MAIN_DLL=${APK_DIR}assets/bin/Data/Managed/Assembly-CSharp.dll
+
+${APK_DIR}: original.apk
+	sha256sum -c CHECKSUMS.sha256
+	apktool decode --output ${APK_DIR} $<
+	mkdir -p dll/original/
+	mv ${MAIN_DLL} dll/original/
+
+install: dist/signed.apk
+	adb install $<
+
+clean:
+	rm -rf dist/ dll/ ${APK_DIR}
+
+dist/base.apk: ${APK_DIR} ${MAIN_DLL}
+	mkdir -p dist/
+	apktool build --output $@ ${APK_DIR}
+
+dist/aligned.apk: dist/base.apk
+	rm -f $@
+	zipalign 4 $< $@
+
+dist/signed.apk: dist/aligned.apk debug-key.pk8
+	apksigner sign --key debug-key.pk8 --cert debug-cert.pem --out $@ dist/aligned.apk
+
+debug-key.pk8:
+	openssl req -x509 -days 9125 -newkey rsa:1024 -nodes -keyout debug-key.pem -out debug-cert.pem -subj "/CN=debug"
+	openssl pkcs8 -topk8 -outform DER -in debug-key.pem -inform PEM -out debug-key.pk8 -nocrypt
+	rm debug-key.pem
+
+dll/main.il: dll/original/Assembly-CSharp.dll
+	ildasm -out=$@ $<
+
+${MAIN_DLL}: dll/main.il
+	ilasm -dll -output=$@ $<