dataLib

🔧 dataLib

🗄️ ARCHIVED

This project is archived and no longer maintained. No new features, bug fixes, or security patches will be released. The information below reflects the state of the project at the time of archival and is kept for reference only.

Use at your own risk — known issues will not be fixed, and newer Minecraft versions are not guaranteed to be compatible.

Minecraft Java Edition 26.2 | Multiplayer-Safe | Pure Datapack

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Current version: v6.0.2

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This datapack was considered safe to use as of its last release, but it no longer receives security improvements, bug fixes, or new features. There is no "up to date" version to move to.

Do not copy datalib:input or datalib:engine into your own datapack. It is an internal implementation detail and may change without notice between releases.

⚠️ Do not use v5.1.1. That version bound _rt_origin.mcfunction to the load tag, causing it to run automatically on every load with no safe removal path. Fixed in later versions — always use the latest release.

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⚠️ A /reload is still required after installation or after adding the load hook below. Automatic first-join initialization is not implemented in this version — do not rely on this until verified in-game with repeated reloads.

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🛡️ This is a Minecraft Datapack — it contains no executables or scripts outside of .mcfunction files.
Some antivirus software may flag .mcfunction files as suspicious due to macro-like syntax. This is a false positive. The pack has been scanned on VirusTotal and returned clean.
Only download from this official repository. Do not trust redistributed or repackaged versions from third-party sources.

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📦 Installation

1. Download the latest release from the Modrinth versions page and place the .zip into <world>/datapacks/.

2. Add the following logic to your datapack's load tag. Replace <namespace> with your own datapack's namespace (e.g. mypack) — this applies only to the function names, never to datalib:engine, which is dataLib's own fixed storage and must not be changed:

#> <namespace>:load
execute unless data storage datalib:engine {global:{loaded:1b}} run function <namespace>:load_datalib

#> <namespace>:load_datalib

# Guard checks the SAME storage/path the trigger condition checks (datalib:engine global.loaded).
execute if data storage datalib:engine {global:{loaded:1b}} run return 0

function dl_load:load/yes
function dl_load:load/fork_no

data modify storage datalib:engine global.loaded set value 1b

Fixed bug: duplicate load trigger (click to expand)

An earlier version checked datalib:engine {global:{loaded:1b}} in the trigger but set <namespace>:engine loaded_datalib in the guard — two different storages, two different paths. The set never satisfied the trigger's condition, so load_datalib re-ran every time the load tag fired. This doesn't crash anything, but it silently re-triggers dl_load:load/yes and fork_no on every reload, which can accumulate side effects depending on what those functions do.

Both the check and the set must target datalib:engine global.loaded. If you're updating from an older copy of this README, verify by reloading multiple times and confirming load_datalib does NOT re-run after the first load.

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🏗️ Storage Architecture

datalib:engine  (persistent data)
├── global
│   ├── version: "v6.0.2"
│   ├── loaded: 1b
│   └── tick: <int>
├── players
│   └── Steve { coins:150, level:5, xp:2300, online:1b, ... }
├── queue
│   └── [{func:"mypack:event/end", delay:100}]
├── cooldowns
│   └── Steve { fireball: 2460, dash: 1870 }  ← expiry ticks
└── events
    └── on_join: [{func:"mypack:welcome"}, {func:"mypack:xp_bonus"}]

datalib:input   (sending data to a function)
datalib:output  (receiving results from a function)

Note: All dataLib-owned state lives under the datalib: namespace only. Never mix a consuming pack's own namespace into dataLib's load-flag logic — that mismatch was the source of the bug above.

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📦 Dependencies

Lantern Load

Repository: https://github.com/LanternMC/load
License: BSD 0-Clause (public domain)

Provides deterministic load order, version tracking, and pre/load/post-load hooks.

# Check if dataLib is loaded
execute if score #dataLib load.status matches 1.. run say dataLib is loaded

# Get version (major*10000 + minor*100 + patch → v6.0.2 = 601)
scoreboard players get dataLib load.status

StringLib

Repository: https://github.com/CMDred/StringLib
License: MIT

Bundled under the stringlib namespace. Exposed via datalib:core/lib/string/*.

Function	Description
lib/string/concat	Join a string array
lib/string/find	Find substring index
lib/string/replace	Replace substring
lib/string/split	Split by separator
lib/string/insert	Insert at index
lib/string/to_lowercase	Lowercase (A–Z, fast)
lib/string/to_uppercase	Uppercase (a–z, fast)
lib/string/to_number	String → numeric NBT
lib/string/to_string	Value → string

All functions read from datalib:input and write to datalib:output string.result.

data modify storage datalib:input string set value "Hello World"
data modify storage datalib:input find set value "World"
data modify storage datalib:input replace set value "Everyone"
function datalib:core/lib/string/replace
# datalib:output string.result → "Hello Everyone"

💬 Support

This project is archived. Issues and pull requests are not monitored and will not be actioned.

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dataLib v6.0.2 | MC Java 26.2 | Pure Datapack