install: Add beta support for debian bullseye for production.

This won't work on a real bullseye system until Bullseye actually
officially releases.

Fixes part of #17863.

puppet/zulip/manifests/profile/base.pp

@@ -23,6 +23,7 @@ class zulip::profile::base {
         /^8\.[0-9]*$/  => 'jessie',
         /^9\.[0-9]*$/  => 'stretch',
         /^10\.[0-9]*$/ => 'buster',
+        /^11\.[0-9]*$/ => 'bullseye',
         # Ubuntu releases
         '12.04' => 'precise',
         '14.04' => 'trusty',

scripts/lib/install

@@ -196,7 +196,7 @@ if [ -f /etc/os-release ]; then
 fi
 
 case "$os_id$os_version_id" in
-    debian10 | ubuntu18.04 | ubuntu20.04) ;;
+    debian10 | debian11 | ubuntu18.04 | ubuntu20.04) ;;
     *)
         set +x
         cat <<EOF
@@ -204,6 +204,7 @@ case "$os_id$os_version_id" in
 Unsupported OS release: $os_id $os_version_id
 
 Zulip in production is supported only on:
+ - Debian 11 "bullseye" (beta)
  - Debian 10 "buster"
  - Ubuntu 18.04 LTS "bionic"
  - Ubuntu 20.04 LTS "focal"

tools/ci/production-install

@@ -11,6 +11,21 @@ APT_OPTIONS=(-o 'Dpkg::Options::=--force-confdef' -o 'Dpkg::Options::=--force-co
 apt-get update
 
 if [ -f /etc/os-release ]; then
+    # This is a temporary hack to test Debian Bullseye systems as
+    # though Bullseye was already released, so we don't need to
+    # change all of our scripts to parse bullseye/sid.
+    check_pretty_name="$(
+        . /etc/os-release
+        printf '%s\n' "$PRETTY_NAME"
+    )"
+    { read -r pretty_name; } <<<"$check_pretty_name"
+
+    if [ "$pretty_name" = "Debian GNU/Linux bullseye/sid" ]; then
+        echo "VERSION_CODENAME=bullseye" | tee -a >>/etc/os-release
+        echo "VERSION_ID=\"11\"" | tee -a >>/etc/os-release
+    fi
+    # End hack
+
     os_info="$(
         . /etc/os-release
         printf '%s\n' "$VERSION_CODENAME"