91 lines
4.2 KiB
Markdown
91 lines
4.2 KiB
Markdown
# RemotePackSync
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RemotePackSync is a lightweight **Spigot 26.2** plugin that keeps Java Edition resource packs synchronized with a remotely hosted SHA-1 checksum and optionally serves a local Bedrock Edition pack to players connecting through **GeyserMC**. It uses only public Bukkit/Spigot and Geyser APIs, so it runs on **Spigot, Paper, Purpur, Bukkit-compatible servers, and current GeyserMC**.
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No NMS, packet libraries, or server-fork-specific APIs are used.
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## Requirements
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- Java 25 (Minecraft/Spigot 26.2 requires Java 25)
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- A Minecraft/Spigot 26.2-compatible server
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## Build
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```bash
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mvn clean package
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```
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The ready-to-install plugin is written to:
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```text
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target/RemotePackSync.jar
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```
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## Installation
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1. Copy `RemotePackSync.jar` into the server's `plugins/` directory.
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2. Start the server once. RemotePackSync writes `plugins/RemotePackSync/config.yml` automatically.
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3. Configure the resource-pack and SHA-1 URLs.
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4. Restart the server, or run `/remotepacksync reload` as an operator.
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## Configuration
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```yaml
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# Direct URL to the .zip resource pack. Leave blank to disable pack delivery.
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resourcePackUrl: "https://cdn.example.com/server-pack.zip"
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# URL to a text file containing the pack's SHA-1 checksum.
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sha1Url: "https://cdn.example.com/server-pack.zip.sha1"
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# Seconds between Java SHA-1 and Bedrock pack checks. Minimum: 30.
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refreshInterval: 300
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# Optional local Bedrock Edition pack for GeyserMC players. Accepts .mcpack or .zip.
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# Relative paths are resolved from plugins/RemotePackSync/.
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bedrockResourcePack: "bedrock/server-pack.mcpack"
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```
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The SHA-1 response must contain a 40-character hexadecimal SHA-1. Both of these standard formats work:
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```text
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0123456789abcdef0123456789abcdef01234567
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```
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```text
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0123456789abcdef0123456789abcdef01234567 server-pack.zip
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```
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## Behaviour
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### Java Edition
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- On startup and at every refresh interval, RemotePackSync fetches only the SHA-1 file asynchronously.
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- When the SHA-1 changes, it sends the configured resource-pack URL and new hash to every online player.
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- Players joining after a successful SHA-1 fetch receive the current resource pack.
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- A failed request leaves the last known-good SHA-1 active, so a brief CDN outage does not interrupt existing pack delivery.
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- If both URLs are blank, delivery is disabled without error. If only one is set, the configuration is rejected and delivery remains disabled.
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### Bedrock Edition through GeyserMC
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- Set `bedrockResourcePack` to a local `.mcpack` or `.zip` file. `.mcpack` is fully supported.
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- The source pack is checked asynchronously at `refreshInterval`. When its SHA-256 changes, RemotePackSync creates a managed copy under `plugins/RemotePackSync/bedrock-managed/`.
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- The managed copy receives a deterministic new header UUID derived from the updated source SHA-256. This makes Bedrock clients treat a changed pack as a new pack, while Geyser calculates and supplies the required final pack hash and size.
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- The original configured pack is never modified.
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- Every new Geyser Bedrock connection receives the latest successfully processed pack through Geyser's public `SessionLoadResourcePacksEvent` API.
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- The pack must be a valid Bedrock pack containing `manifest.json` at the archive root. Geyser does **not** convert Java packs into Bedrock packs.
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- Bedrock's protocol only negotiates packs while a client connects. Players already connected when the file changes must reconnect to receive the new version; RemotePackSync cannot hot-push a replacement to an active Bedrock session.
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- If Geyser is absent, Java Edition resource-pack operation continues normally and Bedrock delivery stays disabled.
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## Commands and permissions
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- `/remotepacksync reload` (alias: `/rps reload`) reloads `config.yml` and begins a fresh asynchronous SHA-1 refresh.
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- Permission: `remotepacksync.reload` (default: `op`).
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## Compatibility
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RemotePackSync compiles against `org.spigotmc:spigot-api:26.2-R0.1-SNAPSHOT` and Geyser API `2.11.0-SNAPSHOT`, targeting Java 25 as required by Minecraft/Spigot 26.2. Java packs are sent through Bukkit's stable `Player#setResourcePack(String, byte[])` API; Bedrock packs use Geyser's public pack/session API. Geyser is a soft dependency, so Java-only servers remain supported.
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## License
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MIT
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