Version Resolution

For simple data packs, confirming the versions of any dependencies in #lantern.1:resolve is sufficient for the data pack to load. However, some data packs, such as Lantern itself, have more complex loading processes. For example, a data pack made to be bundled with other data packs should be aware that multiple versions of the same data pack may be loaded at once. In this case, only one version of the pack should be allowed to load.

A data pack aware of multiple versions would look like this:

// #lantern.1:resolve
{
    "values": [
        "#example:enumerate",
        "#example:resolve"
    ]
}

// #example:enumerate
{
    "values": [
        "example:v1/enumerate"
    ]
}

// #example:resolve
{
    "values": [
        "example:v1/resolve"
    ]
}

# example:v1/enumerate
execute if score lantern lantern.versions matches 1 unless score example lantern.versions matches 1.. run scoreboard players set example lantern.versions 1

# example:v1/resolve
execute if score example lantern.versions matches 1 run function example:v1/initialize

# example:v1/initialize
say example data pack initialized!

In simple cases, this example data pack functions identically to the example on the Getting Started page. However, the difference is that it will not initialize if a conflicting future version is present at the same time. Instead, the conflicting future version would be the one to initialize.