Make makefile more distro generic

Makefile

@@ -2,23 +2,36 @@ VERSION   := `grep "VERSION" g13gui/common.py |awk '{ print $$2 }' |sed 's/'//g'
 GITBRANCH ?= master
 PIPENV    := pipenv
 PYTHON    := `which python3`
-PIP       := $(PYTHON) -m pip
+PIP       := ${PYTHON} -m pip
 
+DISTRO    := $(shell \
+    lsb_release -i \
+        |awk -F: '{ print $$2 }' \
+        |sed -e 's/[ \t]*//g' \
+        |tr '[A-Z]' '[a-z]' \
+        |sed -e 's/linux//g')
 
-all:
+$(warning Building on ${DISTRO})
+
+all: ${DISTRO}
+
+manjaro:
+	makepkg
+
+debian:
 	export GITBRANCH=master
 	debuild
 	debclean
 
-build:
+debian-build:
 	gbp buildpackage --git-debian-branch=$(GITBRANCH)
 
-clean:
+debian-clean:
 	debclean
 
-build-source: clean
+debian-build-source: debian-clean
 	gbp buildpackage -S --git-debian-branch=$(GITBRANCH)
 	mkdir build
 	mv ../g13gui_$(VERSION)* build
 
-release: build-source
+debian-release: debian-build-source