Refactor and simplify Makefile

Makefile

@@ -3,27 +3,22 @@ PKG_VERSION := 3.9.2
 PKG_OPSI_RELEASE := 1.0
 PKG_DEB_RELEASE := 1
 
-# Sources and Checksums can be found on https://www.python.org/downloads/windows/
+# sources and checksums can be found on https://www.python.org/downloads/windows/
 SOURCE_FILENAME := python-$(PKG_VERSION)-amd64.exe
 SOURCE := https://www.python.org/ftp/python/$(PKG_VERSION)/$(SOURCE_FILENAME)
 CHECKSUM := efb20aa1b648a2baddd949c142d6eb06
 
+default: fetch-sources patch-fields
 
-#Variables below are set automatically
-#DEB_CHANGELOG_VERSION := $(shell dpkg-parsechangelog -S Version | sed -rne 's|((-*[^-]+)+)(-[^-]+)|\1|p')
-
-# default target
 BUILDDIR := build
-$(BUILDDIR): fetch-sources patch-fields
+$(BUILDDIR):
+	mkdir -p $(BUILDDIR)/data
 
-create-builddir:
-	[ -d "$(BUILDDIR)/data" ] || mkdir -p $(BUILDDIR)/data
-
-fetch-sources: create-builddir
+fetch-sources: $(BUILDDIR)
 	curl -o $(BUILDDIR)/data/$(SOURCE_FILENAME) $(SOURCE)
 	echo "$(CHECKSUM) $(BUILDDIR)/data/$(SOURCE_FILENAME)" | md5sum -c
 
-patch-fields: create-builddir
+patch-fields: $(BUILDDIR)
 	sed -e "s|@PKG_VERSION@|$(PKG_VERSION)|" \
 	-e "s|@PKG_OPSI_RELEASE@|$(PKG_OPSI_RELEASE)|" \
 	control.in > $(BUILDDIR)/control
@@ -31,7 +26,6 @@ patch-fields: create-builddir
 clean:
 	rm -rf $(BUILDDIR)
 
-
 install: $(BUILDDIR)
 	install -Dm644 $(BUILDDIR)/control -t $(DESTDIR)/srv/deploy/install/$(PKG_NAME)
 	install -Dm644 $(BUILDDIR)/data/* -t $(DESTDIR)/srv/deploy/install/$(PKG_NAME)/data
@@ -44,7 +38,8 @@ uninstall:
 package:
 	dpkg-buildpackage --unsigned-source --unsigned-changes --no-check-builddeps
 
-package-check:
+# DEB_CHANGELOG_VERSION := $(shell dpkg-parsechangelog -S Version | sed -rne 's|((-*[^-]+)+)(-[^-]+)|\1|p')
+package-check-changelog:
 	@if [ "$(DEB_CHANGELOG_VERSION)" != "$(PKG_FULL_VERSION)" ]; then \
 		echo "Mismatch between debian changelog file and Makefile version"; \
 		echo "Debian changelog version: $(DEB_CHANGELOG_VERSION)"; \
@@ -53,4 +48,4 @@ package-check:
 	fi
 
 
-.PHONY: create-builddir fetch-sources patch-fields clean install uninstall package package-check
+.PHONY: default fetch-sources patch-fields clean install uninstall package package-check-changelog