rwx/sh/shell.sh

_sh_shell_color() {
	local code="${1}"
	case "${SH_SHELL}" in
	"bash")
		printf "\x01\e[0"
		if [ -n "${code}" ]; then
			printf "%s" ";${code}"
		fi
		printf "m\x02"
		;;
	*)
		printf "\033["
		if [ -n "${code}" ]; then
			printf "%s" "${code}"
		else
			printf "0"
		fi
		printf "m"
		;;
	esac
}
SH_COLOR_BROWN="$(_sh_shell_color 33)"
SH_COLOR_CYAN="$(_sh_shell_color 36)"
SH_COLOR_DEFAULT="$(_sh_shell_color)"
SH_COLOR_GREEN="$(_sh_shell_color 31)"
SH_COLOR_MAGENTA="$(_sh_shell_color 35)"
SH_COLOR_RED="$(_sh_shell_color 32)"

sh_shell_configure() {
	[ -n "${ENV}" ] || ENV="${SH_MAIN}"
	export ENV
	# prompt
	PS1="\$(sh_shell_prompt \${?})"
	PS2="├ "
	# specific
	case "${SH_SHELL}" in
	"bash")
		# completion
		local root="/usr/share/bash-completion"
		local file="bash_completion"
		local path="${root}/${file}"
		# shellcheck disable=SC1090
		[ -f "${path}" ] && . "${path}"
		root="${root}/completions"
		if [ -d "${root}" ]; then
			set \
				"git" \
				"tar"
			for file in "${@}"; do
				path="${root}/${file}"
				# shellcheck disable=SC1090
				[ -f "${path}" ] && . "${path}"
			done
		fi
		# history
		HISTCONTROL="ignorespace"
		HISTSIZE=-1
		HISTTIMEFORMAT="%Y%m%d %H%M%S "
		;;
	*) ;;
	esac
}
sh_shell_configure

sh_shell_prompt() {
	local date host id
	local code="${1}"
	date="$(date +%H:%M:%S)"
	local git
	host="$(hostname)"
	id="$(id --user)"
	local path="${PWD}"
	local user="${USER}"
	local view="└ "
	# code
	if [ "${code}" -ne 0 ]; then
		view="${view}${SH_COLOR_GREEN}"
	else
		view="${view}${SH_COLOR_RED}"
	fi
	view="${view}${code}"
	# date
	view="${view}${SH_COLOR_DEFAULT} @ "
	view="${view}${SH_COLOR_BROWN}${date}"
	# git
	if command -v "__git_ps1" >"/dev/null"; then
		git="$(__git_ps1)"
		if [ -n "${git}" ]; then
			view="${view}${SH_COLOR_DEFAULT} –${SH_COLOR_MAGENTA}${git}"
		fi
	fi
	# new
	view="${view}\\n"
	# path
	view="${view}${SH_COLOR_CYAN}${path}"
	# new
	view="${view}\\n"
	# frame
	view="${view}${SH_COLOR_DEFAULT}┌ "
	# user
	if [ "${id}" -eq 0 ]; then
		view="${view}${SH_COLOR_GREEN}"
	else
		view="${view}${SH_COLOR_RED}"
	fi
	view="${view}${user}"
	# host
	view="${view}${SH_COLOR_DEFAULT} @ "
	view="${view}${SH_COLOR_BROWN}${host}"
	# new
	view="${view}\\n"
	# prompt
	view="${view}${SH_COLOR_DEFAULT}${PS2}"
	# print
	printf "%b" "${view}"
}

sh_shell_setup() {
	# shell
	echo "export ENV=\"${ENV}\"" >"/etc/profile.d/sh.sh"
	# bash
	local file="/etc/bash.bashrc"
	rm --force --recursive "${file}"
	ln --symbolic "${ENV}" "${file}"
}