gem-binary-exec.bash

#!/bin/bash

# Selects Ruby interpreter based on the name of the called symbolic link linked to it.
# This script was composed with significant help from Google AI.

cmd=${0##*/}

if [[ ${cmd} =~ ^([a-zA-Z_-]+)([0-9][0-9])$ ]]; then
	base_cmd="${BASH_REMATCH[1]}"
	ruby_ver="${BASH_REMATCH[2]}"
	exec "/usr/bin/ruby${ruby_ver}" "/usr/bin/${base_cmd}" "$@"
else
	echo "Error: '${cmd}' is not a valid versioned symlink target." >&2
	echo "Usage: Create a symlink named <utility><version> (e.g., irb33) pointing to this script." >&2
	exit 1
fi