Add automatic whiptail installation and error notices for missing software dependencies #8

This commit modifies the script to automatically install 'whiptail' on Linux, macOS, and Windows if it's not already installed. It also adds error notices instructing the user to install other software dependencies if they're missing. This makes the script more user-friendly and reduces the likelihood of script failure due to missing dependencies.

src/octojoom

@@ -18,6 +18,12 @@ BACK_TITLE="    Octoleo | ${USER}@${SERVER_HOSTNAME}"
 
 #####################################################################################################################VDM
 ######################################## The environment preparation
+# make sure curl is installed
+command -v curl >/dev/null 2>&1 || {
+  echo >&2 "ERROR: ${PROGRAM_NAME} v${_VERSION} script require curl."
+  echo >&2 "NOTICE: Please install curl first and then re-run this script again."
+  exit 1
+}
 # Set OS number
 OS_NUMBER=0 # Unknown
 if [[ "$OSTYPE" == "linux-gnu"* ]]; then
@@ -42,19 +48,60 @@ function check_bash_version() {
 }
 # Check for the appropriate version of Bash
 check_bash_version "$_bash_v"
-# make sure whiptail is installed
+# Install whiptail on Ubuntu
-command -v whiptail >/dev/null 2>&1 || {
+function install_whiptail_linux() {
-  echo >&2 "ERROR: ${PROGRAM_NAME} v${_VERSION} script require whiptail."
+  sudo apt-get update
-  exit 1
+  sudo apt-get install whiptail -y
 }
-# make sure curl is installed
+# Install whiptail on macOS
-command -v curl >/dev/null 2>&1 || {
+function install_whiptail_macos() {
-  echo >&2 "ERROR: ${PROGRAM_NAME} v${_VERSION} script require curl."
+  if ! command -v brew >/dev/null 2>&1; then
-  exit 1
+    echo >&2 "ERROR: ${PROGRAM_NAME} v${_VERSION} script require Homebrew to install whiptail on macOS."
+    echo >&2 "NOTICE: Please install Homebrew first and then re-run this script."
+    exit 1
+  fi
+  brew install newt
 }
+# Install whiptail on Windows using Chocolatey
+function install_whiptail_windows() {
+  if ! command -v choco >/dev/null 2>&1; then
+    echo >&2 "ERROR: ${PROGRAM_NAME} v${_VERSION} script require Chocolatey to install whiptail on Windows."
+    echo >&2 "NOTICE: Please install Chocolatey first and then re-run this script."
+    exit 1
+  fi
+  choco install newt
+}
+# Main script
+if ! command -v whiptail >/dev/null 2>&1; then
+  echo "Whiptail is not installed. Do you want to install it now? (y/n)"
+  read -r response
+  if [[ "$response" =~ ^[Yy]$ ]]; then
+    # If the user chooses Yes, install Docker based on the OS
+    case "$OS_NUMBER" in
+      1)
+        install_whiptail_linux
+        ;;
+      2)
+        install_whiptail_macos
+        ;;
+      3)
+        install_whiptail_windows
+        ;;
+      *)
+        echo >&2 "ERROR: Unsupported operating system."
+        exit 1
+        ;;
+    esac
+  else
+    echo >&2 "ERROR: ${PROGRAM_NAME} v${_VERSION} script require whiptail."
+    echo >&2 "NOTICE: Please install whiptail first and then re-run this script again."
+    exit 1
+  fi
+fi
 # make sure awk is installed
 command -v awk >/dev/null 2>&1 || {
   echo >&2 "ERROR: ${PROGRAM_NAME} v${_VERSION} script require awk."
+  echo >&2 "NOTICE: Please install awk first and then re-run this script again."
   exit 1
 }
 # make sure rsync is installed (hmmm not always)
@@ -116,6 +163,7 @@ if ! command -v docker &>/dev/null; then
   else
     # If the user chooses No, exit the script with an error message
     echo >&2 "ERROR: ${PROGRAM_NAME} v${_VERSION} script requires Docker."
+    echo >&2 "NOTICE: Please install Docker first and then re-run this script again."
     exit 1
   fi
 fi
@@ -171,6 +219,7 @@ if ! command -v docker-compose &>/dev/null; then
   else
     # If the user chooses No, exit the script with an error message
     echo >&2 "ERROR: ${PROGRAM_NAME} v${_VERSION} script requires docker-compose."
+    echo >&2 "NOTICE: Please install docker-compose first and then re-run this script again."
     exit 1
   fi
 fi