Remove plugins.gradle and factor into common extension

game/plugin/build.gradle

@@ -0,0 +1,74 @@
+import com.moandjiezana.toml.Toml
+
+import java.nio.file.Paths
+
+buildscript {
+    repositories {
+        mavenCentral()
+    }
+
+    dependencies {
+        classpath group: 'com.moandjiezana.toml', name: 'toml4j', version: '0.7.1'
+    }
+}
+
+subprojects {
+    if (it.buildFile.exists()) {
+        apply plugin: 'apollo-plugin'
+
+        repositories {
+            mavenCentral()
+            maven {
+                url { 'https://dl.bintray.com/kotlin/kotlinx/' }
+            }
+        }
+    }
+}
+
+task("convertPluginTomlToGradle") {
+    def pluginTree = fileTree(dir: "${project.rootDir}/game/src/plugins/")
+    def pluginDefinitions = pluginTree.matching {
+        include "**/*.toml"
+    }
+
+    pluginDefinitions.each { file ->
+        def meta = new Toml()
+        meta.read(file.absoluteFile)
+
+        def pluginFolder = Paths.get(file.parentFile.absolutePath)
+        def name = meta.getString("name", pluginFolder.getFileName().toString())
+        def normalizedName = name.replaceAll("[^a-zA-Z0-9_]", '_').toLowerCase()
+        def description = meta.getString("description", "")
+        def packageName = meta.getString("package", "org.apollo.game.plugin")
+        def authors = meta.getList("authors", new ArrayList())
+        def dependencies = meta.getList("dependencies", new ArrayList())
+
+        def buildFile = new File(pluginFolder.toFile(), 'build.gradle')
+        buildFile.withWriter('UTF-8') { writer ->
+            writer.write("apolloPlugin {\n")
+            writer.write("    name = \"$normalizedName\"\n")
+
+            if (packageName != "org.apollo.game.plugin") {
+                writer.write("    packageName = \"$packageName\"\n")
+            }
+
+            if (description.length() > 0) {
+                writer.write("    description = \"$description\"\n")
+            }
+
+            if (authors.size > 0) {
+                writer.write("    authors = [\n")
+                authors.each { writer.write("        \"$it\",\n") }
+                writer.write("    ]\n")
+            }
+
+            if (dependencies.size > 0) {
+                writer.write("    dependencies = [\n")
+                dependencies.each { writer.write("        \"$it\",\n") }
+                writer.write("    ]\n")
+            }
+
+            writer.write("}")
+        }
+    }
+}