I was tired of cluttering up my system with dependencies and tools that I only needed to use once, for example to compile something. This gives me a temporary environment in Docker, based on Debian. It mounts the current working directory into the container, automatically updates its package index on startup, and deletes itself unless specifical…

tempenv

#!/bin/bash
# R3tr0Boi 2023

# Function to display usage information
function show_usage {
    echo "Usage: $0 [-k] [-h]"
    echo "Options:"
    echo "  -k    Keep the container at the end (do not remove)"
    echo "  -h    Display this help screen"
    exit 1
}

# Check for command-line options
while getopts ":kh" opt; do
    case ${opt} in
        k )
            keep_container=true
            ;;
        h )
            show_usage
            ;;
        \? )
            echo "Invalid option: -$OPTARG"
            show_usage
            ;;
    esac
done

# Get the absolute path of the current directory
current_dir="$(pwd)"

# Define the base container name
base_container_name="tempenv"

# Generate a unique container name by appending the current Unix timestamp
container_name="$base_container_name-$(date +%s)"

# Create a new Docker container based on Debian
container_id=$(docker run -it -d --name $container_name -v "$current_dir:/mnt" debian:latest)

# Run apt update inside the container
docker exec -it $container_id apt update

# Create a custom bashrc file with colored prompt
docker exec -it $container_id sh -c "echo 'PS1=\"\[\033[01;31m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ \"' >> /root/.bashrc"

# Enter the console of the container with the working directory set to the mounted directory
docker exec -it -w /mnt $container_id bash

# Optionally, print container ID or remove the container based on user choice
if [ "$keep_container" = true ]; then
    echo "Container ID: $container_id"
else
    docker stop $container_id
    docker rm $container_id
fi