add docs

Author: wagyourtail

README.md

@@ -1 +1,92 @@
 # ExpectPlatform
+
+This is a simple project that implements `@ExpectPlatform` and `@PlatformOnly` in a non-specific way.
+
+## Usage
+
+to use this project, you can add the following to your `settings.gradle` file:
+```gradle
+pluginManagement {
+    repositories {
+        mavenLocal()
+        maven {
+            url = "https://maven.wagyourtail.xyz/releases"
+        }
+        maven {
+            url = "https://maven.wagyourtail.xyz/snapshots"
+        }
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+```
+
+and then add the plugin to your `build.gradle` file:
+```gradle
+plugins {
+    id 'xyz.wagyourtail.unimined.expect-platform' version '1.0.3'
+}
+```
+
+you can add the annotations to be accessible with
+```gradle
+dependencies {
+    implementation(expectPlatform.annotationsDep)
+    // or
+    implementation("xyz.wagyourtail.unimined:expect-platform-annotations:${expectPlatform.version}")
+}
+```
+
+to then apply the annotations in a subproject or other module, you can either do:
+
+```gradle
+tasks.create("expectPlatformOutput") {
+    group = "unimined"
+    platformName = platformName
+    inputCollection = rootProject.sourceSets["main"].output
+}
+
+dependencies {
+    common(expectPlatformOutput.outputCollection)
+}
+```
+
+or, you can apply the agent to a JavaExec and create a task to make the final jar:
+
+```gradle
+tasks.withType(JavaExec) {
+    expectPlatform.insertAgent(it, platformName)
+}
+
+tasks.create("PlatformJar", xyz.wagyourtail.unimined.expect.ExpectPlatformJar) {
+    group = "unimined"
+    dependsOn("jar")
+   
+    inputFiles = tasks.jar.outputs.files
+    platformName = platformName
+}
+
+```
+
+if you need the agent on a runner that isn't implementing JavaExecSpec (ie, the one in unimined)
+check [the implementation](src/main/kotlin/xyz/wagyourtail/unimined/expect/ExpectPlatformExtension.kt#L69) for how it actually applies the agent to a JavaExec task.
+
+### Environment
+
+This plugin also provides an `@Environment` annotation, but doesn't hook it up.
+to do so, you can use the following code snippets (as either setting in the task, or the third arg to the agent):
+```gradle
+// neoforge
+    remap = [
+        "xyz/wagyourtail/unimined/expect/annotation/Environment": "net/neoforged/api/distmarker/OnlyIn",
+        "xyz/wagyourtail/unimined/expect/annotation/Environment\$EnvType": "net/neoforged/api/distmarker/Dist",
+        "xyz/wagyourtail/unimined/expect/annotation/Environment\$EnvType.SERVER": "DEDICATED_SERVER",
+    ]
+// fabric
+    remap = [
+        "xyz/wagyourtail/unimined/expect/annotation/Environment": "net/fabricmc/api/Environment",
+        "xyz/wagyourtail/unimined/expect/annotation/Environment\$EnvType": "net/fabricmc/api/EnvType",
+    ]
+```
+
+Do note that while this plugin contains `EnvType.COMBINED`, it is not present in fabric or neoforge, so it is not recommended to use it.

src/main/kotlin/xyz/wagyourtail/unimined/expect/ExpectPlatformExtension.kt

@@ -5,14 +5,14 @@ import groovy.lang.DelegatesTo
 import org.gradle.api.Project
 import org.gradle.api.artifacts.Configuration
 import org.gradle.api.attributes.Attribute
-import org.gradle.api.tasks.Internal
 import org.gradle.process.JavaExecSpec
+import org.jetbrains.annotations.VisibleForTesting
 import xyz.wagyourtail.unimined.expect.transform.ExpectPlatformParams
 import xyz.wagyourtail.unimined.expect.transform.ExpectPlatformTransform
 
 abstract class ExpectPlatformExtension(val project: Project) {
-    @get:Internal
-    @set:Internal
+
+    @set:VisibleForTesting
     var version = ExpectPlatformExtension::class.java.`package`.implementationVersion ?: "1.0.0-SNAPSHOT"
 
     val annotationsDep by lazy { "xyz.wagyourtail.unimined.expect-platform:expect-platform-annotations:$version" }