### @configure_input@

# Copyright (C) 2023 Free Software Foundation, Inc.

# This file is part of GNU Emacs.

# GNU Emacs is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# GNU Emacs is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.

top_builddir = @top_builddir@

-include ${top_builddir}/src/verbose.mk

SHELL = @SHELL@
JAVAC = @JAVAC@
AAPT = @AAPT@
DX = @DX@
ZIPALIGN = @ZIPALIGN@
JARSIGNER = @JARSIGNER@
ANDROID_JAR = @ANDROID_JAR@
ANDROID_ABI = @ANDROID_ABI@

WARN_JAVAFLAGS = -Xlint:deprecation
JAVAFLAGS = -classpath "$(ANDROID_JAR):." -target 1.7 -source 1.7 \
  $(WARN_JAVAFLAGS)

SIGN_EMACS = -keystore emacs.keystore -storepass emacs1

JAVA_FILES = $(shell find . -type f -name *.java)
CLASS_FILES = $(foreach file,$(JAVA_FILES),$(basename $(file)).class)

# How this stuff works.

# emacs.apk depends on emacs.apk-in, which is simply a ZIP archive
# containing the following files:
#  lib/$(ANDROID_ABI)/libemacs.so
#  lib/$(ANDROID_ABI)/libandroid-emacs.so
#  lib/$(ANDROID_ABI)/libctags.so
#  lib/$(ANDROID_ABI)/libhexl.so
#  lib/$(ANDROID_ABI)/libmovemail.so
#  lib/$(ANDROID_ABI)/librcs2log.so
#  lib/$(ANDROID_ABI)/libebrowse.so
#  assets/info/
#  assets/etc/
#  assets/lisp/

.PHONY: emacs.apk-in all
all: emacs.apk

# Binaries to cross-compile.
CROSS_BINS = ../xcompile/src/android-emacs ../xcompile/lib-src/ctags	\
	     ../xcompile/lib-src/hexl ../xcompile/lib-src/movemail	\
	     ../xcompile/lib-src/ebrowse ../xcompile/lib-src/emacsclient

# Libraries to cross-compile.
CROSS_LIBS = ../xcompile/src/libemacs.so

.PHONY: $(CROSS_BINS) $(CROSS_LIBS)

../xcompile/src/android-emacs ../xcompile/src/libemacs.so:
	make -C ../xcompile src/$(notdir $@)

../xcompile/lib-src/hexl ../xcompile/lib-src/movemail \
../xcompile/lib-src/ctags ../xcompile/lib-src/ebrowse &:
	make -C ../xcompile lib-src/$(notdir $@)

emacs.apk-in: $(CROSS_BINS) $(CROSS_LIBS) AndroidManifest.xml
# Make the working directory for this stuff
	rm -rf install_temp
	mkdir -p install_temp/lib/$(ANDROID_ABI)
	mkdir -p install_temp/assets/etc
	mkdir -p install_temp/assets/lisp
	mkdir -p install_temp/assets/info
# Install architecture independents to assets/etc and assets/lisp
	cp -r $(top_builddir)/lisp install_temp/assets
	cp -r $(top_builddir)/etc install_temp/assets
	cp -r $(top_builddir)/info install_temp/assets
# Remove undesirable files from those directories.
	for subdir in `find install_temp -type d -print`; do	\
	  chmod a+rx $${subdir} ;				\
	  rm -rf $${subdir}/.gitignore ;			\
	  rm -rf $${subdir}/.DS_Store ;				\
	  rm -rf $${subdir}/#* ;				\
	  rm -rf $${subdir}/.#* ;				\
	  rm -rf $${subdir}/*~ ;				\
	  rm -rf $${subdir}/*.orig ;				\
	  rm -rf $${subdir}/ChangeLog* ;			\
	  rm -rf $${subdir}/[mM]akefile*[.-]in ;		\
	  rm -rf $${subdir}/Makefile;				\
	done
# Install architecture dependents to lib/$(ANDROID_ABI).  This
# perculiar naming scheme is required to make Android preserve these
# binaries upon installation.
	for file in $(CROSS_BINS); do						\
	  if [ -x $$file ]; then      						\
	    filename=`basename $$file`; 					\
	    cp -f $$file install_temp/lib/$(ANDROID_ABI)/lib$${filename}.so;	\
	  fi 									\
	done
	for file in $(CROSS_LIBS); do				\
	  if [ -x $$file ]; then      				\
	    cp -f $$file install_temp/lib/$(ANDROID_ABI);	\
	  fi 							\
	done
# Package everything.
	$(AAPT) package -I "$(ANDROID_JAR)" -F $@ -f -M AndroidManifest.xml
	pushd install_temp; $(AAPT) add ../$@ `find lib -type f`; popd
	pushd install_temp; $(AAPT) add ../$@ `find assets -type f`; popd
	rm -rf install_temp

.SUFFIXES: .java .class
.java.class &:
	$(AM_V_JAVAC) $(JAVAC) $(JAVAFLAGS) $<

# N.B. that find must be called all over again in case javac generated
# nested classes.

classes.dex: $(CLASS_FILES)
	$(AM_V_DX) $(DX) --classpath $(ANDROID_JAR) \
	  $(subst $$,\$$,$(shell find . -type f -name *.class))

# When emacs.keystore expires, regenerate it with:
#
#  keytool -genkey -v -keystore emacs.keystore -alias "Emacs keystore" \
#   -keyalg RSA -sigalg  SHA1withRSA -keysize 2048 -validity 100000

.PHONY: clean maintainer-clean

emacs.apk: classes.dex emacs.apk-in emacs.keystore
	cp -f emacs.apk-in $@.unaligned
	$(AAPT) add $@.unaligned classes.dex
	$(JARSIGNER) $(SIGN_EMACS) $@.unaligned "Emacs keystore"
	$(ZIPALIGN) -f 4 $@.unaligned $@
	rm -f $@.unaligned

clean:
	rm -f emacs.apk emacs.apk-in *.dex *.unaligned *.class
	rm -rf install-temp
	find . -name '*.class' -delete

maintainer-clean: clean