Nearly works

.gitignore

@@ -2,3 +2,10 @@ node_modules
 .flatpak-builder
 build
 /dist
+source
+app
+app-32.7z
+deezer-*.exe
+package-lock.json
+package.json
+app.7z

Makefile

@@ -0,0 +1,50 @@
+# Maintainer: Aurélien Hamy <aunetx@yandex.com>
+
+PKGNAME = deezer
+PKGVER = 5.30.0
+BASE_URL = https://www.deezer.com/desktop/download/artifact/win32/x86/$(PKGVER)
+EXE_NAME = $(PKGNAME)-$(PKGVER)-setup.exe
+
+json_add = '},\
+  "scripts": {\
+	"dist": "electron-builder",\
+	"start": "electron ."\
+  },\
+  "devDependencies": {\
+    "electron": "^12.0.11",\
+	"electron-builder": "^22.13.1"\
+  }\
+}'
+
+install_build_deps:
+	npm install --engine-strict asar
+
+prepare: install_build_deps
+	wget -c $(BASE_URL) -O $(EXE_NAME)
+	# Extract app from installer
+	7z x -so $(EXE_NAME) '$$PLUGINSDIR/app-32.7z' > app-32.7z
+	# Extract app archive
+	7z x -y -bsp0 -bso0 app-32.7z -osource
+	
+	asar extract source/resources/app.asar app
+	
+	mkdir -p app/resources/linux/
+	install -Dm644 source/resources/win/systray.png app/resources/linux/
+	
+	# prettier --write "app/build/*.js"
+	# Hide to tray (https://github.com/SibrenVasse/deezer/issues/4)
+	# patch -p1 -dresources/app < quit.patch
+
+	head -n -2 app/package.json > tmp.txt && mv tmp.txt app/package.json
+	echo  $(json_add) | tee -a app/package.json
+
+	npm i --prefix=app --package-lock-only
+	./flatpak-node-generator.py npm app/package-lock.json -o flatpak/generated-sources.json --electron-node-headers --xdg-layout
+
+
+build: prepare
+	cd flatpak && flatpak-builder build dev.aunetx.deezer.yml --install --force-clean --user
+
+
+clean:
+	rm -rf app flatpak/{.flatpak-builder,build} node_modules source app-32.7z app.7z deezer-*.exe package-lock.json