LP2097308: Use PostgreSQL apt archive when necessary

Debian Buster has been moved to PostgreSQL's apt archive and removed from the
primary repo. This will break fresh installs as the pgdg repo can't be added
correctly. This patch will allow buster installations to work again and can
be used as a template when other Debian PostgreSQL packages are archived
before we stop supporting them.

Signed-off-by: Jason Boyer <JBoyer@equinoxOLI.org>
Signed-off-by: Chris Sharp <csharp@georgialibraries.org>

Author: Jason Boyer

Open-ILS/src/extras/install/Makefile.debian

@@ -33,11 +33,17 @@ debian_sys_config:
 
 # Adding this for installing versions from PostgreSQL community apt source
 debian_postgresql_repo:
-	if test -z "$$(grep -R apt.postgresql.org /etc/apt/)" ; then \
+	if test -z "$$(grep -R postgresql.org /etc/apt/)" ; then \
 		mkdir -p --mode 0755 /etc/apt/keyrings ; \
-		echo "deb [signed-by=/etc/apt/keyrings/pgdg.asc] http://apt.postgresql.org/pub/repos/apt/ $(RELEASE_CODENAME)-pgdg main" \
-		     > /etc/apt/sources.list.d/pgdg.list; \
 		wget --quiet -O /etc/apt/keyrings/pgdg.asc https://www.postgresql.org/media/keys/ACCC4CF8.asc ; \
+		if test "$(RELEASE_CODENAME)" = "buster" ; then \
+			$(APT_TOOL) install apt-transport-https ; \
+			echo "deb [signed-by=/etc/apt/trusted.gpg.d/pgdg.asc] https://apt-archive.postgresql.org/pub/repos/apt/ $(RELEASE_CODENAME)-pgdg main" \
+				> /etc/apt/sources.list.d/pgdg.list; \
+		else \
+            echo "deb [signed-by=/etc/apt/keyrings/pgdg.asc] http://apt.postgresql.org/pub/repos/apt/ $(RELEASE_CODENAME)-pgdg main" \
+		         > /etc/apt/sources.list.d/pgdg.list; \
+		fi ; \
 		$(APT_TOOL) update ; \
 	fi