Remove balenalib and dependencies

.github/workflows/flowzone.yml

@@ -24,4 +24,6 @@ jobs:
       )
     secrets: inherit
     with:
-      balena_slugs: 'balenalabs/browser-aarch64,balenalabs/browser-amd64,balenalabs/browser-armv7hf'
+      # Prevent publishing of releases to balenaCloud after its move to balena-io-experimental org
+      # To update on balenaHub, do a manual push of the browser block from the balenalabs account 
+      balena_slugs: ''

Dockerfile.template

@@ -1,6 +1,6 @@
-ARG NODEJS_VERSION="20.12.0"
+FROM node:20.19.2-bookworm
 
-FROM balenalib/%%BALENA_MACHINE_NAME%%-debian-node:${NODEJS_VERSION}-bookworm-run
+ENV DEBIAN_FRONTEND=noninteractive
 
 # Install the necessary packages
 COPY ./build /usr/src/build

build/install_chromium

@@ -34,7 +34,8 @@ else
     ln -s /usr/bin/chromium /usr/bin/chromium-browser
 fi
 
-install_packages \
+# mimic previous balenalib "install_packages" behavior:
+apt-get update && apt-get install -y  --no-install-recommends \
     ${CHROMIUM_PACKAGE} \
     chromium-common \
     libgles2-mesa \
@@ -47,4 +48,5 @@ install_packages \
     xserver-xorg-video-fbdev \
     xserver-xorg xinit \
     xinput \
-    xterm
+    xterm && \
+    rm -rf /var/cache/apt/archives/* /var/lib/apt/lists/*

src/entry.sh

@@ -0,0 +1,85 @@
+#!/bin/bash
+
+# This command only works in privileged container
+tmp_mount='/tmp/_balena'
+mkdir -p "$tmp_mount"
+if mount -t devtmpfs none "$tmp_mount" &> /dev/null; then
+	PRIVILEGED=true
+	umount "$tmp_mount"
+else
+	PRIVILEGED=false
+fi
+rm -rf "$tmp_mount"
+
+function mount_dev()
+{
+	tmp_dir='/tmp/tmpmount'
+	mkdir -p "$tmp_dir"
+	mount -t devtmpfs none "$tmp_dir"
+	mkdir -p "$tmp_dir/shm"
+	mount --move /dev/shm "$tmp_dir/shm"
+	mkdir -p "$tmp_dir/mqueue"
+	mount --move /dev/mqueue "$tmp_dir/mqueue"
+	mkdir -p "$tmp_dir/pts"
+	mount --move /dev/pts "$tmp_dir/pts"
+	touch "$tmp_dir/console"
+	mount --move /dev/console "$tmp_dir/console"
+	umount /dev || true
+	mount --move "$tmp_dir" /dev
+
+	# Since the devpts is mounted with -o newinstance by Docker, we need to make
+	# /dev/ptmx point to its ptmx.
+	# ref: https://www.kernel.org/doc/Documentation/filesystems/devpts.txt
+	ln -sf /dev/pts/ptmx /dev/ptmx
+
+	# When using io.balena.features.sysfs the mount point will already exist
+	# we need to check the mountpoint first.
+	sysfs_dir='/sys/kernel/debug'
+
+	if ! mountpoint -q "$sysfs_dir"; then
+		mount -t debugfs nodev "$sysfs_dir"
+	fi
+
+}
+
+function start_udev()
+{
+	if [ "$UDEV" == "on" ]; then
+		if $PRIVILEGED; then
+			mount_dev
+			if command -v udevd &>/dev/null; then
+				unshare --net udevd --daemon &> /dev/null
+			else
+				unshare --net /lib/systemd/systemd-udevd --daemon &> /dev/null
+			fi
+			udevadm trigger &> /dev/null
+		else
+			echo "Unable to start udev, container must be run in privileged mode to start udev!"
+		fi
+	fi
+}
+
+function init()
+{
+	# echo error message, when executable file is passed but doesn't exist.
+	if [ -n "$1" ]; then
+		if CMD=$(command -v "$1" 2>/dev/null); then
+			shift
+			exec "$CMD" "$@"
+		else
+			echo "Command not found: $1"
+			exit 1
+		fi
+	fi
+}
+
+UDEV=$(echo "$UDEV" | awk '{print tolower($0)}')
+
+case "$UDEV" in
+	'1' | 'true')
+		UDEV='on'
+	;;
+esac
+
+start_udev
+init "$@"

src/start.sh

@@ -4,7 +4,7 @@
 sysctl -w user.max_user_namespaces=10000
 
 # Run balena base image entrypoint script
-/usr/bin/entry.sh echo "Running balena base image entrypoint..."
+/usr/src/app/entry.sh echo "Running balena base image entrypoint..."
 
 export DBUS_SYSTEM_BUS_ADDRESS=unix:path=/host/run/dbus/system_bus_socket
 
@@ -25,7 +25,7 @@ if [[ -z "$DISPLAY_NUM" ]]
 fi
 
 # set whether to show a cursor or not
-if [[ ! -z $SHOW_CURSOR ]] && [[ "$SHOW_CURSOR" -eq "1" ]]
+if [[ -n $SHOW_CURSOR ]] && [[ "$SHOW_CURSOR" -eq "1" ]]
   then
     export CURSOR=''
     echo "Enabling cursor"
@@ -67,5 +67,6 @@ environment=$(env | grep -v -w '_' | awk -F= '{ st = index($0,"=");print substr(
 environment="${environment::-1}"
 
 # launch Chromium and whitelist the enVars so that they pass through to the su session
-su -w $environment -c "export DISPLAY=:$DISPLAY_NUM && startx /usr/src/app/startx.sh $CURSOR" - chromium
-balena-idle
+su -w "$environment" -c "export DISPLAY=:$DISPLAY_NUM && startx /usr/src/app/startx.sh $CURSOR" - chromium
+
+sleep infinity