chruby-exec

#!/usr/bin/env bash

chruby_sh="${0%/*}/../share/chruby/chruby.sh"
source "$chruby_sh"

case "$1" in
	-h|--help)
		echo "usage: chruby-exec RUBY [RUBYOPTS] -- COMMAND [ARGS...]"
		exit
		;;
	-V|--version)
		echo "chruby version $CHRUBY_VERSION"
		exit
		;;
esac

if (( $# == 0 )); then
	echo "chruby-exec: RUBY and COMMAND required" >&2
	exit 1
fi

argv=()

for arg in "$@"; do
	shift

	if [[ "$arg" == "--" ]]; then break
	else                          argv+=($arg)
	fi
done

if (( $# == 0 )); then
	echo "chruby-exec: COMMAND required" >&2
	exit 1
fi

shell_opts=("-l")
[[ -t 0 ]] && shell_opts+=("-i")

source_command="command -v chruby >/dev/null || source $chruby_sh"
chruby_command="chruby $(printf "%q " "${argv[@]}")"
sub_command="$(printf "%q " "$@")"
command="$source_command; $chruby_command && $sub_command"

exec "$SHELL" "${shell_opts[@]}" -c "$command"