#! /bin/bash --
[ ! -z "${GREZZO_MAIN}" ] && return; GREZZO_MAIN=0

function this_script_path() {
    unset CDPATH
    echo "$(cd "$(dirname "$(readlink -f -- "${BASH_SOURCE[1]}")")" > /dev/null && pwd -P)"
}

function feat_bashrc_before_needed() {
	local bashrc="$HOME/.bashrc"
	local include_line='. "$HOME/.bashrc.before"'
	if [ ! -f "$bashrc" ]; then
		printf 'HOME="%s"\n%s\n' "$HOME" "$include_line" > "$bashrc"
		return
	fi
	if grep -Fqs "$include_line" "$bashrc" || grep -Fqs "$HOME/.bashrc.before" "$bashrc"; then
		return
	fi
	{
		printf 'HOME="%s"\n%s\n' "$HOME" "$include_line"
		cat "$bashrc"
	} > "$bashrc.tmp"
	mv "$bashrc.tmp" "$bashrc"
}

function feat_missing() {
	! command -v "$1" >/dev/null 2>&1
}

function feat_needed() {
	FEAT="$1"
	if feat_missing "$FEAT"; then
		if type "feat_add_$FEAT" >/dev/null 2>&1; then
			eval "feat_add_$FEAT"
		else
			echo "Missing function: feat_add_$FEAT" >&2
			return 1
		fi
	fi
}