bin.env

# adapted from Arch' /etc/profile
# zsh has no nameref; sunrise by hand
append() {
	local name="$1" var="$(eval "echo \"\$$1\"")"; shift
	local arg
	for arg; do
		case ":$var:" in
		*:"$arg":*) ;;
		*) var="${var:+$var:}$arg" ;;
		esac
	done
	eval "$name=\"$var\""
}
prepend() {
	local name="$1" var="$(eval "echo \"\$$1\"")"; shift
	local arg
	for arg; do
		case ":$var:" in
		*:"$arg":*) ;;
		*) var="$arg${var:+:$var}" ;;
		esac
	done
	eval "$name=\"$var\""
}

if [[ -t 2 ]]; then echo "bin.env" >&2; fi

if test -n "$BASH"; then __bin_path="$BASH_SOURCE"
elif test -n "$ZSH_NAME"; then __bin_path="${(%):-%x}"
else echo "bin.env: cannot deduce path: unsupported shell" >&2; return 1
fi

__bin_path="$(realpath -qe -- "$__bin_path")"
__bin_path="$(dirname "$__bin_path")"
if ! [[ -e "$__bin_path/lib/lib.sh" ]]; then
	echo "bin.env: bad deduced path: '$__bin_path'" >&2; return 1
fi

# add common utils and command wrappers
__path=(
	$__bin_path/hw
	$__bin_path/tools
	$__bin_path/inc
	$__bin_path/util
	$__bin_path/wrappers
)

__path_add_dir_and_sub() {
	for p in "$1"/*; do
		[[ -f "$p" && -x "$p" ]] && { __path+=( "$1" ); break; }
	done
	for p in "$1"/*; do
		[[ -d "$p" ]] && __path+=( "$p" )
	done
}

# add custom git subcommands
__path_add_dir_and_sub "$__bin_path/git"
# add external tools
__path_add_dir_and_sub "$__bin_path/ext"

prepend PATH "${__path[@]}"

unset __path_add_dir_and_sub
unset __bin_path __path p