Verify and Install Essential Command-Line Tools

#!/bin/bash

# List of required tools
REQUIRED_TOOLS=("node" "npm" "git" "docker")

# Function to check if a command exists
command_exists () {
  type "$1" &> /dev/null ;
}

echo "Checking for required development tools..."

INSTALL_MISSING=false
for tool in "${REQUIRED_TOOLS[@]}"; do
  if command_exists "$tool"; then
    echo "✅ $tool is installed."
  else
    echo "❌ $tool is NOT installed."
    INSTALL_MISSING=true
  fi
done

if $INSTALL_MISSING; then
  read -p "Some tools are missing. Do you want to attempt to install them? (y/n) " -n 1 -r
  echo
  if [[ $REPLY =~ ^[Yy]$ ]]; then
    echo "Attempting to install missing tools (requires sudo privileges)..."

    if command_exists apt-get; then
        sudo apt-get update
        for tool in "${REQUIRED_TOOLS[@]}"; do
            if ! command_exists "$tool"; then
                echo "Installing $tool..."
                sudo apt-get install -y "$tool"
            fi
        done
    elif command_exists yum; then
        echo "Using yum for installation (RPM-based systems)..."
        for tool in "${REQUIRED_TOOLS[@]}"; do
            if ! command_exists "$tool"; then
                echo "Installing $tool..."
                sudo yum install -y "$tool"
            fi
        done
    elif command_exists brew; then
        echo "Using Homebrew for installation (macOS/Linux)..."
        for tool in "${REQUIRED_TOOLS[@]}"; do
            if ! command_exists "$tool"; then
                echo "Installing $tool..."
                brew install "$tool"
            fi
        done
    else
        echo "No supported package manager (apt-get, yum, brew) found. Please install tools manually."
    fi

    echo "Re-checking installed tools..."
    for tool in "${REQUIRED_TOOLS[@]}"; do
      if command_exists "$tool"; then
        echo "✅ $tool is now installed."
      else
        echo "❌ $tool is still NOT installed. Manual intervention may be needed."
      fi
    done

  else
    echo "Installation skipped. Please install missing tools manually."
  fi
else
  echo "All required tools are installed."
fi