docker.sh

#!/bin/bash

# Check for existing docker installation
if path=$(command -v docker); then
    echo "Docker already installed as $path. Aborting."
    exit 1
fi

# Let user choose installation method
echo "Installation methods:"
PS3="Selection: "
select option in "Snap" "Repository" "Official script"; do
    case $option in
    "Snap")
        echo "Installing from snap package."
        sudo snap install docker
        break
        ;;
    "Repository")
        echo "Installing from system repository."
        sudo apt install docker.io
        break
        ;;
    "Official script")
        echo "Installing using official get-docker script."
        curl -sSL https://get.docker.com | sh
        break
        ;;
    *) ;;
    esac
done

# Create docker user group
if ! grep -q "docker" /etc/group; then
    sudo groupadd docker
fi

# Assign current user to docker user group
if ! grep -q "docker:[a-z0-9:]*:[\w,]*$USER[\w,]*" /etc/group; then
    sudo usermod -aG docker $USER
    echo "Please log out and back in to complete the setup."
fi