install: Support Debian 12.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

scripts/lib/install

@@ -219,7 +219,7 @@ if [ -f /etc/os-release ]; then
 fi
 
 case "$os_id $os_version_id" in
-    'debian 11' | 'ubuntu 20.04' | 'ubuntu 22.04') ;;
+    'debian 11' | 'debian 12' | 'ubuntu 20.04' | 'ubuntu 22.04') ;;
     *)
         set +x
         cat <<EOF
@@ -228,6 +228,7 @@ Unsupported OS release: $os_id $os_version_id
 
 Zulip in production is supported only on:
  - Debian 11
+ - Debian 12
  - Ubuntu 20.04 LTS
  - Ubuntu 22.04 LTS
 

scripts/lib/upgrade-zulip-stage-2

@@ -210,6 +210,7 @@ if os.path.exists("/etc/init.d/postgresql"):
     if not postgresql_version:
         default_postgresql_version = {
             ("debian", "11"): "13",
+            ("debian", "12"): "15",
             ("ubuntu", "20.04"): "12",
             ("ubuntu", "22.04"): "14",
             ("centos", "7"): "11",

scripts/setup/apt-repos/zulip/bookworm.list

@@ -0,0 +1,2 @@
+deb http://apt.postgresql.org/pub/repos/apt/ bookworm-pgdg main
+deb-src http://apt.postgresql.org/pub/repos/apt/ bookworm-pgdg main

scripts/setup/apt-repos/zulip/custom.sh

@@ -26,6 +26,10 @@ if [[ ! -e /usr/share/doc/groonga-apt-source/copyright ]]; then
             read -r distribution
             read -r release
         } <<<"$os_info"
+        if [ "$distribution" = debian ] && [ "$release" = bookworm ]; then
+            # PGroonga binaries are not yet provided for Debian 12.
+            exit
+        fi
         groonga_apt_source_deb="groonga-apt-source-latest-$release.deb"
         groonga_apt_source_deb_sign="$groonga_apt_source_deb.asc.$pgroonga_apt_sign_key_fingerprint"
         curl -fLO --retry 3 "https://packages.groonga.org/$distribution/$groonga_apt_source_deb"