Better way to write this function?

[grave oak]

is there a better way to write this function? i was thinking item modifiers but i dont really know how they work

## Add Tag
# Util function for adding an entity tag to a spawn egg

## Args
# tag : string

execute unless block ~ ~ ~ #air run return fail
setblock ~ ~ ~ minecraft:barrel
item replace block ~ ~ ~ container.0 from entity @s weapon.mainhand
$data modify block ~ ~ ~ Items[0].components."minecraft:entity_data".Tags append value $(tag)
item replace entity @s weapon.mainhand from block ~ ~ ~ container.0
setblock ~ ~ ~ air

[balmy ice]

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[balmy ice]

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Requested by ra.ts

[lost steppe]

An item modifier instead of the data command there would be better, yes

[winged dove]

how would i do it with item modifiers though?

[lost steppe]

In fact you can do an item modifier instead of copying the item to a container first

Make an item modifier, then use it with the item modify command

If you mean "how do I make an item modifier?" then try using Misode's generator
https://misode.github.io/item-modifier/

[winged dove]

i dont understand the generator, what would be the option for modifying components

theres one for setting and one for copying

does setting also modify?

[lost steppe]

Ah, I wasn't looking too closely at what you were doing with your data command. I don't believe there's a way to append tags like that with an item modifier

So what you have is the best way to do it, but it's possible that with better context as to what you're trying to do, an alternative could be found that does use an item modifier

[winged dove]

i have a handful of special spawn eggs for entities in my map, and i use tags for enabling and disabling them, the function modifies the spawn egg im holding to add a tag to the entity that it's going to spawn

since the egg is special, it needs to keep its data

[sterile sierra]

almost every item modifier is for modifying components

to append to a tag inside the custom_data component, you can use the copy_custom_data function

[winged dove]

its not custom data

[sterile sierra]

oh nvm I misread "entity data" as "custom data"

yeah an operation like that doesn't exist for entity_data

[winged dove]

unfortunate

[sterile sierra]

actually, an inline item modifier could probably do it

[winged dove]

what makes inline modifiers special?

[sterile sierra]

that they're set using a command, so macro commands let you set their contents

oh but that still wouldn't let you actually append

I only thought of how to make set_entity_data set a dynamic value

[winged dove]

oh

yeah

i mean i could probably throw the entire item's components into a big macro maybe, but i dont know if its worth it

[lost steppe]

If you're doing this function a lot, then probably

[winged dove]

it's a util function, i run it manually and only when i need it