[Desktop-lite] - VNC_RESOLUTION unreadable fix - issue #945 fix (#1024)

* [Desktop-lite] - VNC_RESOLUTION unreadable fix - issue #945

* bump to patch version done

* changes as suggested

* changes - removing escaped variables for init to go smoothly

* misc change

* few more escaped vars - making them unescaped

* misc changes

* changes for sudo - command not found error in few test cases

src/desktop-lite/devcontainer-feature.json

 {
     "id": "desktop-lite",
-    "version": "1.2.0",
+    "version": "1.2.1",
     "name": "Light-weight Desktop",
     "documentationURL": "https://github.com/devcontainers/features/tree/main/src/desktop-lite",
     "description": "Adds a lightweight Fluxbox based desktop to the container that can be accessed using a VNC viewer or the web. GUI-based commands executed from the built-in VS code terminal will open on the desktop automatically.",

src/desktop-lite/install.sh

@@ -293,7 +293,7 @@ echo -e "\nSuccess!\n"
 EOF
 
 # Container ENTRYPOINT script
-cat << EOF > /usr/local/share/desktop-init.sh
+cat << 'EOF' > /usr/local/share/desktop-init.sh
 #!/bin/bash
 
 user_name="${USERNAME}"
@@ -309,50 +309,67 @@ export LANGUAGE="${LANGUAGE:-"en_US.UTF-8"}"
 # Execute the command it not already running
 startInBackgroundIfNotRunning()
 {
-    log "Starting \$1."
-    echo -e "\n** \$(date) **" | sudoIf tee -a /tmp/\$1.log > /dev/null
-    if ! pgrep -x \$1 > /dev/null; then
-        keepRunningInBackground "\$@"
-        while ! pgrep -x \$1 > /dev/null; do
+    log "Starting $1."
+    echo -e "\n** $(date) **" | sudoIf tee -a /tmp/\$1.log > /dev/null
+    if ! pgrep -x $1 > /dev/null; then
+        keepRunningInBackground "$@"
+        while ! pgrep -x $1 > /dev/null; do
             sleep 1
         done
-        log "\$1 started."
+        log "$1 started."
     else
-        echo "\$1 is already running." | sudoIf tee -a /tmp/\$1.log > /dev/null
-        log "\$1 is already running."
+        echo "$1 is already running." | sudoIf tee -a /tmp/\$1.log > /dev/null
+        log "$1 is already running."
     fi
 }
 
 # Keep command running in background
 keepRunningInBackground()
 {
-    (\$2 bash -c "while :; do echo [\\\$(date)] Process started.; \$3; echo [\\\$(date)] Process exited!; sleep 5; done 2>&1" | sudoIf tee -a /tmp/\$1.log > /dev/null & echo "\$!" | sudoIf tee /tmp/\$1.pid > /dev/null)
+    ($2 bash -c "while :; do echo [\\$(date)] Process started.; $3; echo [\\$(date)] Process exited!; sleep 5; done 2>&1" | sudoIf tee -a /tmp/\$1.log > /dev/null & echo "\$!" | sudoIf tee /tmp/\$1.pid > /dev/null)
+}
+
+apt_get_update()
+{
+    if [ "$(find /var/lib/apt/lists/* | wc -l)" = "0" ]; then
+        echo "Running apt-get update..."
+        apt-get update -y
+    fi
+}
+
+check_packages() {
+    if ! dpkg -s "$@" > /dev/null 2>&1; then
+        apt_get_update
+        apt-get -y install --no-install-recommends "$@"
+    fi
 }
 
 # Use sudo to run as root when required
 sudoIf()
 {
-    if [ "\$(id -u)" -ne 0 ]; then
-        sudo "\$@"
+    if [ "$(id -u)" -ne 0 ]; then
+        check_packages sudo
+        sudo "$@"
     else
-        "\$@"
+        "$@"
     fi
 }
 
 # Use sudo to run as non-root user if not already running
 sudoUserIf()
 {
-    if [ "\$(id -u)" -eq 0 ] && [ "\${user_name}" != "root" ]; then
-        sudo -u \${user_name} "\$@"
+    if [ "$(id -u)" -eq 0 ] && [ "${user_name}" != "root" ]; then
+        check_packages sudo
+        sudo -u "${user_name}" "$@"
     else
-        "\$@"
+        "$@"
     fi
 }
 
 # Log messages
 log()
 {
-    echo -e "[\$(date)] \$@" | sudoIf tee -a \$LOG > /dev/null
+    echo -e "[$(date)] $@" | sudoIf tee -a $LOG > /dev/null
 }
 
 log "** SCRIPT START **"
@@ -371,22 +388,22 @@ done
 sudoIf rm -rf /tmp/.X11-unix /tmp/.X*-lock
 mkdir -p /tmp/.X11-unix
 sudoIf chmod 1777 /tmp/.X11-unix
-sudoIf chown root:\${group_name} /tmp/.X11-unix
-if [ "\$(echo "\${VNC_RESOLUTION}" | tr -cd 'x' | wc -c)" = "1" ]; then VNC_RESOLUTION=\${VNC_RESOLUTION}x16; fi
-screen_geometry="\${VNC_RESOLUTION%*x*}"
-screen_depth="\${VNC_RESOLUTION##*x}"
+sudoIf chown root:${group_name} /tmp/.X11-unix
+if [ "$(echo "${VNC_RESOLUTION}" | tr -cd 'x' | wc -c)" = "1" ]; then VNC_RESOLUTION=${VNC_RESOLUTION}x16; fi
+screen_geometry="${VNC_RESOLUTION%*x*}"
+screen_depth="${VNC_RESOLUTION##*x}"
 
 # Check if VNC_PASSWORD is set and use the appropriate command
-common_options="tigervncserver \${DISPLAY} -geometry \${screen_geometry} -depth \${screen_depth} -rfbport ${VNC_PORT} -dpi \${VNC_DPI:-96} -localhost -desktop fluxbox -fg"
+common_options="tigervncserver ${DISPLAY} -geometry ${screen_geometry} -depth ${screen_depth} -rfbport ${VNC_PORT} -dpi ${VNC_DPI:-96} -localhost -desktop fluxbox -fg"
 
-if [ -n "\${VNC_PASSWORD+x}" ]; then
-    startInBackgroundIfNotRunning "Xtigervnc" sudoUserIf "\${common_options} -passwd /usr/local/etc/vscode-dev-containers/vnc-passwd"
+if [ -n "${VNC_PASSWORD+x}" ]; then
+    startInBackgroundIfNotRunning "Xtigervnc" sudoUserIf "${common_options} -passwd /usr/local/etc/vscode-dev-containers/vnc-passwd"
 else
-    startInBackgroundIfNotRunning "Xtigervnc" sudoUserIf "\${common_options} -SecurityTypes None"
+    startInBackgroundIfNotRunning "Xtigervnc" sudoUserIf "${common_options} -SecurityTypes None"
 fi
 
 # Spin up noVNC if installed and not running.
-if [ -d "/usr/local/novnc" ] && [ "\$(ps -ef | grep /usr/local/novnc/noVNC*/utils/launch.sh | grep -v grep)" = "" ]; then
+if [ -d "/usr/local/novnc" ] && [ "$(ps -ef | grep /usr/local/novnc/noVNC*/utils/launch.sh | grep -v grep)" = "" ]; then
     keepRunningInBackground "noVNC" sudoIf "/usr/local/novnc/noVNC*/utils/launch.sh --listen ${NOVNC_PORT} --vnc localhost:${VNC_PORT}"
     log "noVNC started."
 else
@@ -394,8 +411,8 @@ else
 fi
 
 # Run whatever was passed in
-log "Executing \"\$@\"."
-exec "\$@"
+log "Executing "\$@\"."
+exec "$@"
 log "** SCRIPT EXIT **"
 EOF