feat(update): add flag (self, all)

[LoneExile]

I make some changes from #123

Please let me know if any changes or improvements are needed, and I'll be happy to make the necessary adjustments. Thank you for considering this contribution!

[LoneExile]

Do you think it would be better to check for out-of-date plugins and only show those that need to be updated?

    local _plugin _plug _status _out_of_date

    function _check() {
        git -C "$1" remote update &> /dev/null
        _out_of_date=false
        case $(LANG=en_US git -C "$1" status -uno | grep -Eo '(ahead|behind|up to date)') in
            ahead)
                _status='\033[1;34mLocal ahead remote\033[0m' ;;
            behind)
                _status='\033[1;33mOut of date\033[0m'
                _out_of_date=true ;;
            'up to date')
                _status='\033[1;32mUp to date\033[0m' ;;
            *)
                _status='\033[1;31mDiverged state\033[0m' ;;
        esac
    }

    [[ "$1" == "-a" || "$1" == "--all" ]] && { for _plug in ${ZAP_INSTALLED_PLUGINS[@]}; do _check "$ZAP_PLUGIN_DIR/$_plug"; $_out_of_date && _pull "$ZAP_PLUGIN_DIR/$_plug"; done; return; }

[mamaraddio]

Please make it as suggested in #123

    [[ $1 = "self" ]] && { _pull $ZAP_DIR; return }
    [[ $1 = "all" ]] && { for _plug in ${ZAP_INSTALLED_PLUGINS[@]}; do _pull "$ZAP_PLUGIN_DIR/$_plug"; done; return }

Is more clear when you want to update all plugins to run zap update all instead of using --all option.
In addition the zap update self is useful for updating zap itself without entering the interactive menu (all doesn't update zap itself).

Lastly the return without value returns the status code of the last executed command.

[LoneExile]

Hi! I have made the changes you requested in #123:

I've updated the _zap_update() function to support the self and all options as you suggested:

Using zap update self will now update Zap itself without entering the interactive menu.
Using zap update all will update all plugins without the need for the --all option. Please note that all doesn't update Zap itself.

Please review the changes and let me know if you have any feedback. Thanks!

[mamaraddio]

Thanks for your contribution @LoneExile