Use rsync for copying dist files. Add presets/ dir to generated Makefile in helper.py.

helper.py

@@ -88,8 +88,9 @@ SOURCES += $(wildcard src/*.cpp)
 
 # Add files to the ZIP package when running `make dist`
 # The compiled plugin and "plugin.json" are automatically added.
-DISTRIBUTABLES += res
 DISTRIBUTABLES += $(wildcard LICENSE*)
+DISTRIBUTABLES += res
+DISTRIBUTABLES += presets
 
 # Include the Rack plugin Makefile framework
 include $(RACK_DIR)/plugin.mk

plugin.mk

@@ -73,11 +73,7 @@ else
 	$(STRIP) -s dist/$(SLUG)/$(TARGET)
 endif
 	@# Copy distributables
-ifdef ARCH_MAC
-	rsync -rR $(DISTRIBUTABLES) dist/$(SLUG)/
-else
-	cp -r --parents $(DISTRIBUTABLES) dist/$(SLUG)/
-endif
+	rsync -vrR --ignore-missing-args $(DISTRIBUTABLES) dist/$(SLUG)/
 	@# Create ZIP package
 	cd dist && tar -c $(SLUG) | zstd -$(ZSTD_COMPRESSION_LEVEL) -o "$(SLUG)"-"$(VERSION)"-$(ARCH).vcvplugin