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Aliases (advanced YAML usage)
YAML allows you to use an advanced tool called "aliases". These tricks work in any config file that's written in YAML.
Aliases allow you to define a string/list/number or even a whole block of data, give it a name and recall it later with just that name. You can even modify sub-sections of the data when recalling the alias.
Some examples follow:
aliases: # example of an alias that defines just a single piece of data - &environ [DAMAGE_ENTITY_EXPLOSION, DAMAGE_FIRE, DAMAGE_CONTACT, DAMAGE_DROWNING, DAMAGE_FALL, DAMAGE_SUFFOCATION] # example of an alias that defines a block of data, using the previously defined alias - &environDropNothing tool: *environ drop: NOTHING exclusive: 1 # this means that if this drop occurs - none of the others will, unless they have the same number otherblocks: CREATURE_ZOMBIE: - *environDropNothing # stop mob farming - no environmental drops # continue with any other custom drops....
Modifying alias contents
The following example is designed to allow you to easily copy a similar config between different blocks whilst modifying a section of the alias. Note the use of <<: (a "merge key") as this is what allows you to modify the alias.
aliases: - &damageall tool: ALL drop: AIR damageattacker: 1 - &dropnothing tool: ALL drop: NOTHING chance: 100 - &defaultdroplow # this alias has a low chance of dropping default item tool: ALL drop: DEFAULT chance: 5 - &specitem # this alias is being used specifically for overwriting the "tool" condition later tool: ALL drop: DEFAULT chance: 100 exclusive: 1 otherblocks: #stones STONE: - *dropnothing - *damageall - *defaultdroplow - <<: *specitem tool: ANY_PICKAXE DIRT: - *dropnothing - *damageall - *defaultdroplow - <<: *specitem tool: ANY_SPADE
Defining aliases from modified aliases
Again a more advanced example. Pay attention to how
&specitem-pick is defined from a modification of the
# original example by enelar ALIASES: #1) With fingers - damage attacker, nothing changed with block. (&damageall) #2) On wrong tool - nothing changed with block. (&wrongtool) #3) On pickaxe, each race individual chance to drop, always drops cobblestone. #4) Kill player else. (Broken with dirt, sand, fish, seeds, etc) (&atata) - &wrongtool tool: ANY drop: DENY exclusive: wrong - &atata damageattacker: 20 tool: ANY drop: NOTHING toolexcept: [ANY_SPADE, ANY_AXE, ANY_HOE, ANY_PICKAXE] replacementblock: DEFAULT message: "WTF! Wrong item... Non RP playing..." exclusive: atata - &damageall tool: ALL drop: AIR replacementblock: DEFAULT message: "Oh, my fingers!" damageattacker: 1 - &defaultdroplow tool: ALL drop: DEFAULT chance: 5 - &specitem tool: ALL drop: DEFAULT chance: 100 exclusive: 1 - &dropstone tool: ANY_PICKAXE drop: COBBLESTONE exclusive: 1 COAL_ORE: - <<: *wrongtool toolexcept: ANY_PICKAXE - <<: *damageall damageattacker: 8 - <<: *atata - <<: *dropstone - &specitem-pick <<: *specitem tool: ANY_PICKAXE chance: 40 permissions: race_a.COAL_ORE - <<: *specitem-pick chance: 60 permissions: race_h.COAL_ORE - <<: *specitem-pick chance: 60 permissions: race_t.COAL_ORE - <<: *specitem-pick chance: 5 permissions: race_r.COAL_ORE
If you missed it here is the specific part defining
- &specitem-pick # note: this alias name must be on it's own line <<: *specitem # remember, <<: allows you to modify the alias tool: ANY_PICKAXE # change tool from &specitem's ALL value to ANY_PICKAXE
Use with DropGroups
Aliases can also be used with DropGroups to create more complex aliases.
aliases: - &map_and_compass dropgroup: mapcompass chance: 0.01% drops: - drop: MAP - drop: COMPASS otherblocks: SAND: - *map_and_compass
This likely has more practical applications (as you probably wouldn't want to define the
mapcompass drop more than once. I might improve this example later with a more practical example if I think of one.
Alias nodes are described in the YAML specification here. A basic example is also shown in Example 2.24 on that page.