feat: drop Ubuntu Bionic support

Fixes #2035

install

@@ -268,11 +268,6 @@ install_service() {
 
   [[ -f "$service_src" ]] || error "service '$service_name' src path '$service_src' does not exists!"
 
-  # TODO: Remove when Bionic support is dropped
-  if [[ $distro == "bionic" ]]; then
-    mkdir -p "$SERVICE_DIR"
-  fi
-
   template_file "$service_src" "$service_dest" \
     sed \
       -e "s|^User=.*|User=${LIBRETIME_USER}|" \
@@ -283,13 +278,6 @@ install_service() {
       -e "s|@@LOG_DIR@@|${LOG_DIR}|g" \
       -e "s|@@WORKING_DIR@@|${WORKING_DIR}|g"
 
-  # TODO: Remove when Bionic support is dropped
-  if [[ $distro == "bionic" ]]; then
-    for feature in ProtectClock ProtectHostname ProtectKernelLogs ProtectProc; do
-      sed -i -e "s|^${feature}=|#${feature}=|" "$service_dest"
-    done
-  fi
-
   chmod 0644 "$service_dest"
   chown root:root "$service_dest"
   systemctl enable "$service_name"
@@ -319,12 +307,12 @@ check_distribution()  {
   case "$ID-$VERSION_ID" in
     debian-10)    is_debian=true && distro="buster" ;;
     debian-11)    is_debian=true && distro="bullseye" ;;
-    ubuntu-18.04) is_ubuntu=true && distro="bionic" ;;
     ubuntu-20.04) is_ubuntu=true && distro="focal" ;;
     *)
       error << "EOF"
   could not determine supported distribution "$ID-$VERSION_ID"!
 
+  Support for installing LibreTime on Bionic has dropped since 3.1.0.
   Support for installing LibreTime on Xenial has dropped since 3.0.0-alpha.10.
   Support for installing LibreTime on Stretch has dropped since 3.0.0-alpha.10.
   Support for installing LibreTime on Jessie has dropped since 3.0.0-alpha.8.
@@ -433,9 +421,7 @@ if $LIBRETIME_SETUP_POSTGRESQL; then
   install_packages postgresql postgresql-client
 
   if $is_first_install; then
-    # TODO: Swap lines when Bionic support is dropped
-    # if ! sudo -u postgres psql --csv --tuples-only --command='\du' | grep -qw "^$LIBRETIME_POSTGRESQL_USER"; then
-    if ! sudo -u postgres psql --tuples-only --command='\du' | grep -qw "$LIBRETIME_POSTGRESQL_USER"; then
+    if ! sudo -u postgres psql --csv --tuples-only --command='\du' | grep -qw "^$LIBRETIME_POSTGRESQL_USER"; then
       info "creating PostgreSQL user '$LIBRETIME_POSTGRESQL_USER'"
       sudo -u postgres createuser "$LIBRETIME_POSTGRESQL_USER"
       sudo -u postgres psql -c "ALTER ROLE $LIBRETIME_POSTGRESQL_USER WITH PASSWORD '$LIBRETIME_POSTGRESQL_PASSWORD';"
@@ -446,9 +432,7 @@ if $LIBRETIME_SETUP_POSTGRESQL; then
       warning "PostgreSQL user '$LIBRETIME_POSTGRESQL_USER' already exists!"
     fi
 
-    # TODO: Swap lines when Bionic support is dropped
-    # if ! sudo -u postgres psql --csv --tuples-only --list | grep -qw "^$LIBRETIME_POSTGRESQL_DATABASE"; then
-    if ! sudo -u postgres psql --tuples-only --list | grep -qw "$LIBRETIME_POSTGRESQL_DATABASE"; then
+    if ! sudo -u postgres psql --csv --tuples-only --list | grep -qw "^$LIBRETIME_POSTGRESQL_DATABASE"; then
       info "creating PostgreSQL database '$LIBRETIME_POSTGRESQL_DATABASE' with owner '$LIBRETIME_POSTGRESQL_USER'"
       sudo -u postgres createdb --template=template0 --encoding=UTF-8 --owner="$LIBRETIME_POSTGRESQL_USER" "$LIBRETIME_POSTGRESQL_DATABASE"
 
@@ -474,9 +458,7 @@ if $LIBRETIME_SETUP_RABBITMQ; then
   install_packages rabbitmq-server
 
   if $is_first_install; then
-    # TODO: Swap lines when Bionic support is dropped
-    # if ! rabbitmqctl --quiet list_users | grep -qw "^$LIBRETIME_RABBITMQ_USER"; then
-    if ! rabbitmqctl -q list_users | grep -qw "^$LIBRETIME_RABBITMQ_USER"; then
+    if ! rabbitmqctl --quiet list_users | grep -qw "^$LIBRETIME_RABBITMQ_USER"; then
       info "creating RabbitMQ user '$LIBRETIME_RABBITMQ_USER'"
       rabbitmqctl add_user "$LIBRETIME_RABBITMQ_USER" "$LIBRETIME_RABBITMQ_PASSWORD"
 
@@ -486,9 +468,7 @@ if $LIBRETIME_SETUP_RABBITMQ; then
       warning "RabbitMQ user '$LIBRETIME_RABBITMQ_USER' already exists!"
     fi
 
-    # TODO: Swap lines when Bionic support is dropped
-    # if ! rabbitmqctl --quiet list_vhosts | grep -qw "^$LIBRETIME_RABBITMQ_VHOST"; then
-    if ! rabbitmqctl -q list_vhosts | grep -qw "^$LIBRETIME_RABBITMQ_VHOST"; then
+    if ! rabbitmqctl --quiet list_vhosts | grep -qw "^$LIBRETIME_RABBITMQ_VHOST"; then
       info "creating RabbitMQ vhost '$LIBRETIME_RABBITMQ_VHOST' with owner '$LIBRETIME_RABBITMQ_USER'"
       rabbitmqctl add_vhost "$LIBRETIME_RABBITMQ_VHOST"
       rabbitmqctl set_permissions -p "$LIBRETIME_RABBITMQ_VHOST" "$LIBRETIME_RABBITMQ_USER" '.*' '.*' '.*'
@@ -515,11 +495,6 @@ if $LIBRETIME_SETUP_ICECAST; then
   install_packages icecast2
   systemctl enable icecast2
 
-  # TODO: Remove when Bionic support is dropped
-  if [[ $distro == "bionic" ]]; then
-    sed --in-place -e "s|^ENABLE=.*$|ENABLE=true|" /etc/default/icecast2
-  fi
-
   systemctl start icecast2
 
   if $is_first_install; then
@@ -568,15 +543,6 @@ section "API"
 # shellcheck disable=SC2046
 install_packages $(list_packages "$SCRIPT_DIR/api")
 
-# TODO: Remove when Bionic support is dropped
-if [[ $distro == "bionic" ]]; then
-  info "installing gunicorn"
-  $PIP install \
-    'gunicorn' \
-    'uvicorn>=0.16.0,<0.17'
-  ln -sf /usr/local/bin/gunicorn /usr/bin/gunicorn
-fi
-
 install_python_app "$SCRIPT_DIR/api[prod]"
 
 install_service "libretime-api.service" "$SCRIPT_DIR/api/install/systemd/libretime-api.service"
@@ -629,11 +595,6 @@ install_python_app "$SCRIPT_DIR/worker"
 info "creating libretime-worker working directory"
 mkdir_and_chown "$LIBRETIME_USER" "$WORKING_DIR/worker"
 
-# TODO: Remove when Bionic support is dropped
-if [[ $distro == "bionic" ]]; then
-  ln -sf /bin/sh /usr/bin/sh
-fi
-
 install_service "libretime-worker.service" "$SCRIPT_DIR/worker/install/systemd/libretime-worker.service"
 
 # Install Legacy