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import com.google.gson.GsonBuilder
import com.google.gson.JsonArray
import com.google.gson.JsonObject
import com.google.gson.JsonPrimitive
import org.apache.tools.ant.filters.BaseParamFilterReader
import org.gradle.api.file.FileCopyDetails
import org.gradle.api.tasks.SourceSet
import java.io.File
import java.io.Reader
import java.io.StringReader
class MixinFilterReader(reader: Reader) : BaseParamFilterReader() {
lateinit var sourceRoots: Collection<File>
val gson = GsonBuilder().setPrettyPrinting().create()
val betterReader: StringReader by lazy {
StringReader(run {
val json = gson.fromJson(reader.readText(), JsonObject::class.java)
val mixinPackage = (json["package"] as JsonPrimitive).asString
val allMixins = (json["mixins"] as JsonArray?)?.map { it.asString }?.toMutableSet() ?: mutableSetOf()
sourceRoots
.forEach { base ->
base.walk()
.filter { it.isFile }
.forEach {
val relativeString = it.toRelativeString(base).replace("\\", "/")
if (relativeString.startsWith(mixinPackage.replace(".", "/") + "/")
&& relativeString.endsWith(".java")
&& it.readText().contains("@Mixin")
)
allMixins.add(
relativeString.replace("/", ".").dropLast(5).drop(mixinPackage.length + 1)
)
}
}
json.add("mixins", JsonArray().also { jsonAllMixins ->
allMixins.forEach { jsonAllMixins.add(it) }
})
gson.toJson(json)
})
}
override fun read(): Int {
return betterReader.read()
}
}
fun FileCopyDetails.autoDiscoverMixins(sourceSet: SourceSet) {
filter(mapOf("sourceRoots" to sourceSet.allSource.srcDirs), MixinFilterReader::class.java)
}
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