Add target to create appstore package.

.gitignore

@@ -1,4 +1,5 @@
 /pdfjs-*.zip
 3rdparty/pdfjs/
+build/
 server/config.js
 server/package-lock.json

Makefile

@@ -1,5 +1,15 @@
 PDFJS_VERSION=2.0.943
 
+app_name=pdfdraw
+
+project_dir=$(CURDIR)/../$(app_name)
+build_dir=$(CURDIR)/build/artifacts
+appstore_dir=$(build_dir)/appstore
+source_dir=$(build_dir)/source
+sign_dir=$(build_dir)/sign
+package_name=$(app_name)
+cert_dir=$(HOME)/.nextcloud/certificates
+
 all: 3rdparty
 
 3rdparty: pdfjs
@@ -12,3 +22,38 @@ pdfjs: pdfjs-${PDFJS_VERSION}-dist.zip
 	unzip -qo pdfjs-${PDFJS_VERSION}-dist.zip -d 3rdparty/pdfjs
 
 build: 3rdparty
+
+clean:
+	rm -rf $(build_dir)
+
+appstore: clean build
+	mkdir -p $(sign_dir)
+	rsync -a \
+	--exclude=build \
+	--exclude=.eslintignore \
+	--exclude=.eslintrc.yml \
+	--exclude=.git \
+	--exclude=.github \
+	--exclude=.gitignore \
+	--exclude=.gitmodules \
+	--exclude=Makefile \
+	--exclude=node_modules \
+	--exclude=pdfjs*.zip \
+	--exclude=package.json \
+	--exclude=run-*lint.sh \
+	--exclude=.stylelintrc \
+	$(project_dir)/ \
+	$(sign_dir)/$(app_name)
+	@if [ -f $(cert_dir)/$(app_name).key ]; then \
+		echo "Signing app files…"; \
+		php ../../occ integrity:sign-app \
+			--privateKey=$(cert_dir)/$(app_name).key\
+			--certificate=$(cert_dir)/$(app_name).crt\
+			--path=$(sign_dir)/$(app_name); \
+	fi
+	tar -czf $(build_dir)/$(app_name)-$(version).tar.gz \
+		-C $(sign_dir) $(app_name)
+	@if [ -f $(cert_dir)/$(app_name).key ]; then \
+		echo "Signing package…"; \
+		openssl dgst -sha512 -sign $(cert_dir)/$(app_name).key $(build_dir)/$(app_name)-$(version).tar.gz | openssl base64; \
+	fi