lib_brewing

lib_brewing is a mcfunction library that allows other datapacks to replace custom potions with splash and lingering potions when brewed in a brewing stand. This is used to prevent the Uncraftable Splash Potion and Uncraftable Lingering Potion items from being obtainable.

How to Use

Next to allow the module to utilize the library, two functions tags, two functions, and two loot tables should be created.

• create the function tag file

  /data/gm4_brewing/tags/functions/insert/splash.json

  with the following code:

{
    "values": [
        "MODULE_ID:brewing_stand/splash"
    ]
}

• create the function tag file

  /data/gm4_brewing/tags/functions/insert/splash.json

  with the following code:

{
    "values": [
        "MODULE_ID:brewing_stand/lingering"
    ]
}

• create the function file

  /data/MODULE_ID/functions/brewing_stand/splash.mcfunction

  with the following code:

# @s = brewing stand marker with a custom potion to be converted to a splash potion
# run from #gm4_brewing:insert/splash

loot spawn ~ ~ ~ loot MODULE_ID:technical/brewing_stand/splash
# uncomment this line to completely clear the potion VV
# execute if <...> run scoreboard players set $insert gm4_brewing_data -1

• create the function file

  /data/MODULE_ID/functions/brewing_stand/lingering.mcfunction

  with the following code:

# @s = brewing stand marker with a custom splash potion to be converted to a lingering potion
# run from #gm4_brewing:insert/lingering

loot spawn ~ ~ ~ loot MODULE_ID:technical/brewing_stand/lingering
# uncomment this line to completely clear the potion VV
# execute if <...> run scoreboard players set $insert gm4_brewing_data -1

• create the loot table file /data/MODULE_ID/loot_tables/technical/brewing_stand/splash.json>

  with the following code:

{
    "pools": [
        {
            "rolls": 1,
            "entries": [
                {
                    "type": "minecraft:alternatives",
                    "children": [
                        {
                            "type": "minecraft:loot_table",
                            "name": "LOOT TABLE PATH TO SPLASH POTION 1",
                            "conditions": [
                                {
                                    "condition": "minecraft:entity_properties",
                                    "entity": "this",
                                    "predicate": {
                                        "nbt": "{data:{gm4_brewing:{insert:{tag:{INDICATION NBT FOR POTION 1}}}}}"
                                    }
                                }
                            ]
                        },
                        {
                            "type": "minecraft:loot_table",
                            "name": "LOOT TABLE PATH TO SPLASH POTION 2",
                            "conditions": [
                                {
                                    "condition": "minecraft:entity_properties",
                                    "entity": "this",
                                    "predicate": {
                                        "nbt": "{data:{gm4_brewing:{insert:{tag:{INDICATION NBT FOR POTION 2}}}}}"
                                    }
                                }
                            ]
                        }
                    ]
                }
            ],
            "functions": [
                {
                    "function": "minecraft:set_nbt",
                    "tag": "{gm4_custom_potion:1b}"
                }
            ]
        }
    ]
}

• create the loot table file

  /data/MODULE_ID/loot_tables/technical/brewing_stand/lingering.json

  with the following code:

{
    "pools": [
        {
            "rolls": 1,
            "entries": [
                {
                    "type": "minecraft:alternatives",
                    "children": [
                        {
                            "type": "minecraft:loot_table",
                            "name": "LOOT TABLE PATH TO LINGERING POTION 1",
                            "conditions": [
                                {
                                    "condition": "minecraft:entity_properties",
                                    "entity": "this",
                                    "predicate": {
                                        "nbt": "{data:{gm4_brewing:{insert:{tag:{INDICATION NBT FOR SPLASH POTION 1}}}}}"
                                    }
                                }
                            ]
                        },
                        {
                            "type": "minecraft:loot_table",
                            "name": "LOOT TABLE PATH TO LINGERING POTION 2",
                            "conditions": [
                                {
                                    "condition": "minecraft:entity_properties",
                                    "entity": "this",
                                    "predicate": {
                                        "nbt": "{data:{gm4_brewing:{insert:{tag:{INDICATION NBT FOR SPLASH POTION 2}}}}}"
                                    }
                                }
                            ]
                        }
                    ]
                }
            ],
            "functions": [
                {
                    "function": "minecraft:set_nbt",
                    "tag": "{gm4_custom_potion:1b}"
                }
            ]
        }
    ]
}

Additional Functionality

• the contents of the brewing stand the tick before it finishes brewing can be found by the entity nbt of the marker under the following namespace:

execute if data entity @s data.gm4_brewing.insert.tag.<ITEM_NBT>

• in the two created function files (/brewing_stand/splash.mcfunction and /brewing_stand/lingering.mcfunction) additonal commands can be run before the /loot command to change the outcome of the loot tables.

• Using the following command will clear the custom potion from the brewing stand:

scoreboard players set $insert gm4_brewing_data -1

• the function tag /data/gm4_brewing/tags/functions/finish_brew.json

  runs AFTER default interactions of creating splash and lingering potions

  • to test for items in the brewing stand, use the entity data from the marker:
    • execute if entity @s[nbt={data:{gm4_brewing:{previous_items:[BLOCK_DATA]}}}]
    • e.g. this is the code that checks if a splash potion should be created:
      • execute if entity @s[nbt={data:{gm4_brewing:{previous_items:[{Slot:3b,id:"minecraft:gunpowder"}]}}}]

Please note that the example_pack must be started by calling #load:load, as a proper load implementation is not included.