debian: add updates repo definition and key

Makefile

@@ -169,4 +169,9 @@ install-common:
 	install -d $(DESTDIR)/var/run/qubes
 	install -d $(DESTDIR)/home_volatile/user
 
+install-deb:
+	mkdir -p $(DESTDIR)/etc/apt/sources.list.d
+	sed -e "s/@DIST@/`cat /etc/debian_version | cut -d/ -f 1`/" misc/qubes-r2.list.in > $(DESTDIR)/etc/apt/sources.list.d/qubes-r2.list
+	install -D -m 644 misc/qubes-archive-keyring.gpg $(DESTDIR)/etc/apt/trusted.gpg.d/qubes-archive-keyring.gpg
+
 install-vm: install-rh install-common

debian/rules

@@ -13,6 +13,6 @@ override_dh_auto_build:
 	make all
 
 override_dh_auto_install:
-	make install-common
+	make install-common install-deb
 	make -C qrexec install
 

misc/qubes-r2.list.in

@@ -0,0 +1,11 @@
+# Main qubes updates repository
+deb http://deb.qubes-os.org/r2/vm @DIST@ main
+deb-src http://deb.qubes-os.org/r2/vm @DIST@ main
+
+# Qubes updates candidates repository
+#deb http://deb.qubes-os.org/r2/vm @DIST@-testing main
+#deb-src http://deb.qubes-os.org/r2/vm @DIST@-testing main
+
+# Qubes experimental/unstable repository
+#deb http://deb.qubes-os.org/r2/vm @DIST@-unstable main
+#deb-src http://deb.qubes-os.org/r2/vm @DIST@-unstable main