Use whichever python version is available to start a simple http server that serves the current directory.

serve.sh

#!/usr/bin/env bash
set -e

# Example usage: `cd web && PORT=8000 ./serve.sh`

# Default to 8080 if no PORT is specified
PORT="${PORT:-8080}"  

# Check which python major version is available and start a simple http server accordingly
if [[ "$(python -c 'import sys; print(sys.version_info[0])')" == "3"* ]]; then
  python -m http.server "${PORT}"
else
  python -m SimpleHTTPServer "${PORT}"
fi