Plugin Metadata
Nota
The metadata described here is for plugins for SpongeAPI 8 or later. Plugins for version 7 should define their
metadata in the @Plugin annotation
Every Sponge plugin must have an entry in a metadata file known as sponge_plugins.json, which is found in the
META-INF directory. In most cases, a plugin JAR will contain this file, and the file will refer to one plugin.
However, it is possible for there to be multiple plugins in a JAR, and the metadata file can represent multiple plugins.
If you are using Gradle, SpongeGradle 2 makes it easy to define the metadata for your plugin. If you are creating a new plugin, or you want a reference on how to use SpongeGradle 2, take a look at our plugin template repository which provides an example configuration to use.
While much of the metadata is optional, adding it helps users to identify your plugin more easily by giving them the ability to check the name, version, description, or even the authors of a plugin at runtime. It will also be used when publishing plugins on a plugin portal like Ore.
Plugin annotation
You should define the @Plugin annotation on your plugin’s main class, and supply its ID.
import org.spongepowered.api.plugin.Plugin;
@Plugin(id = "myplugin")
Additonal metadata must be defined in the sponge_plugins.json file.
The sponge_plugins.json format
Nota
If you’re using the SpongeGradle plugin, we strongly recommend that you use the metadata builder provided there.
The META-INF/sponge_plugins.json file, with one plugin, looks like this:
{
"loader": {
"name": "java_plain",
"version": "1.0"
},
"license": "MIT",
"global": {
"version": "8.0.0",
"links": {
"homepage": "https://www.spongepowered.org",
"source": "https://www.spongepowered.org/source",
"issues": "https://www.spongepowered.org/issues"
},
"contributors": [
{
"name": "SpongePowered",
"description": "Lead Developer"
}
],
"dependencies": [
{
"id": "spongeapi",
"version": "8.0.0"
}
]
},
"plugins": [
{
"id": "test",
"name": "Test Plugin",
"entrypoint": "org.spongepowered.test.TestPlugin",
"description": "Manages the test plugins"
}
]
}
In general, your plugin json file won’t change from this much. Anything in the «global» section can also be placed in each plugin’s metadata, which allows for overriding of values in complex, multi-plugin JAR files.
The following table explains each section of this file:
Section |
Required |
Explanation |
|---|---|---|
loader |
yes |
The loader that the plugin uses. In most cases, plugins will use the «java_plain» loader version «1.0» |
licence |
yes |
The licence that the JAR that contains the plugins falls under. Free text, but common choices are MIT and Apache 2 |
mappings |
no |
The mappings that the code within the JAR may be written in. The format of this string should be in maven dependency format (group:artifact:version). You should consult the mappings vendor to determine the correct form of this field if you need it. Standard Sponge plugins will not need to use mappings, and so this field will be omitted in these cases |
global |
no |
Attributes that apply to all plugins, but can be overridden on a per-plugin basis. See «plugin attributes» below for a list of permissible values. If this block is not specified, all required values must be in all plugin blocks. |
plugins |
yes, at least one plugin is required |
A list of plugin objects with plugin specific metadata. See «plugin attributes» below for a list of permissible values |
Plugin Attributes
Plugins may have the following attributes. Any attribute that is marked «global» may appear in the «global» section, and can be overridden on a per plugin basis.
Attribute |
Required |
Global |
Explanation |
|---|---|---|---|
id |
yes |
no |
The plugin ID. |
name |
no |
no |
The plugin’s friendly name. |
description |
no |
no |
A description of the plugin. |
entrypoint |
yes |
no |
The plugin’s entrypoint, which is the fully qualified name of the class that the plugin loader should try to instantiate and load (often referred to as the main class) |
version |
yes |
yes |
The plugin version. Should be in SemVer format. |
links |
no |
yes |
Links to your project on the web. Contains up to three sub properties - all are optional:
|
branding |
no |
yes |
How your plugin is branded in the client. Contains two fields:
|
contributors |
yes |
yes |
A list of contributors to your plugin. At least one is required with a name and description. |
dependencies |
no |
yes |
A list of dependencies that your plugin has. Contains the following fields:
|
