Add simplistic packaging infrastructure

The other option would be to use Haikuporter, but it's kind of too
heavy for simpler use cases.

Makefile

@@ -133,3 +133,31 @@ DRIVER_PATH =
 DEVEL_DIRECTORY := \
 	$(shell findpaths -r "makefile_engine" B_FIND_PATH_DEVELOP_DIRECTORY)
 include $(DEVEL_DIRECTORY)/etc/makefile-engine
+
+# Package creation #############################################################
+
+PACKAGE_DIR := .
+
+TARGET_FILENAME := $(basename $(TARGET))
+$(PACKAGE_DIR)/$(NAME).hpkg: $(TARGET) package/.PackageInfo
+	# Set up the package structure
+	cp -r package _build_package
+	mkdir -p _build_package/apps
+	cp '$(TARGET)' _build_package/apps/'$(TARGET_FILENAME)'
+	mkdir -p _build_package/data/deskbar/menu/Applications/
+	(cd _build_package/data/deskbar/menu/Applications/; \
+	 ln -s ../../../../apps/'$(TARGET_FILENAME)' .)
+	mkdir -p _build_package/data/mime_db/
+	mimeset --all --mimedb _build_package/data/mime_db/ --mimedb /system/data/mime_db/ '$(TARGET)'
+	# Generate the package
+	mkdir -p '$(PACKAGE_DIR)'
+	package create -C _build_package '$(PACKAGE_DIR)'/'$(NAME)'.hpkg
+	# And clean up
+	rm -r _build_package
+package: $(PACKAGE_DIR)/$(NAME).hpkg
+
+rmpackage:
+	-rm -rf _build_package
+	-rm -f '$(PACKAGE_DIR)'/'$(NAME)'.hpkg
+
+.PHONY: package rmpackage

README.md

@@ -12,3 +12,5 @@ It's a large, Conky-inspired clock display intended to be a replicant! Although
 We use pretty much the standard makefile engine setup. Simply run `make` at the top directory and you should be good to go!
 
 This project does not have any dependencies beyond the C++ development environment.
+
+A .hpkg package may be created by running `make package`.

package/.PackageInfo

@@ -0,0 +1,22 @@
+name            BigClock
+version         0.1.1-1
+architecture    x86_64
+
+summary         "Nice and large clock replicant"
+urls            "https://github.com/parnikkapore/hk-HugeClock/"
+description     "A large, Conky-inspired clock display intended to be a replicant! Although of course you can run it as an app as well."
+
+packager        "Parnikkapore"
+vendor          "Parnikkapore"
+
+copyrights      "2019-2023 Parnikkapore"
+licenses        "MPL v2.0"
+
+provides {
+  BigClock = 0.1.1-1
+  app:BigClock = 0.1.1
+}
+
+requires {
+  haiku >= r1~beta2
+}