properly implement ProviderSource for our spark jar provider

Author: granny

patches/server/0256-Spark-Profiler.patch

@@ -19,10 +19,10 @@ index 708e5bb9bbf0476fcc2c4b92c6830b094703b43e..6141f716b15ad47ac2ac4c9ce92a3897
      // This will be the end of me...
 diff --git a/src/main/java/io/papermc/paper/plugin/provider/source/SparkProviderSource.java b/src/main/java/io/papermc/paper/plugin/provider/source/SparkProviderSource.java
 new file mode 100644
-index 0000000000000000000000000000000000000000..a7d1ae53eac94bc2dcf8bc78ef1da0d3b8554736
+index 0000000000000000000000000000000000000000..cb78dac8e072b5cb3c6e52e17c9ecdf708aeedc1
 --- /dev/null
 +++ b/src/main/java/io/papermc/paper/plugin/provider/source/SparkProviderSource.java
-@@ -0,0 +1,102 @@
+@@ -0,0 +1,115 @@
 +package io.papermc.paper.plugin.provider.source;
 +
 +import com.mojang.logging.LogUtils;
@@ -44,26 +44,23 @@ index 0000000000000000000000000000000000000000..a7d1ae53eac94bc2dcf8bc78ef1da0d3
 +import org.bukkit.plugin.java.JavaPlugin;
 +import org.slf4j.Logger;
 +
-+public class SparkProviderSource extends FileProviderSource {
-+    public static final SparkProviderSource INSTANCE = new SparkProviderSource();
++public class SparkProviderSource implements ProviderSource<Path, Path> {
 +
++    public static final SparkProviderSource INSTANCE = new SparkProviderSource();
++    private static final FileProviderSource FILE_PROVIDER_SOURCE = new FileProviderSource("File '%s' specified by Purpur"::formatted);
 +    private static final Logger LOGGER = LogUtils.getClassLogger();
 +
-+    public SparkProviderSource() {
-+        super("File '%s' specified by Purpur"::formatted);
-+    }
-+
 +    @Override
-+    public void registerProviders(EntrypointHandler entrypointHandler, Path context) throws Exception {
++    public Path prepareContext(Path context) {
 +        // first, check if user doesn't want spark at all
 +        if (Boolean.getBoolean("Purpur.IReallyDontWantSpark")) {
-+            return; // boo!
++            return null; // boo!
 +        }
 +
 +        // second, check if user has their own spark
 +        if (hasSpark()) {
 +            LOGGER.info("Purpur: Using user-provided spark plugin instead of our own.");
-+            return; // let's hope it's at least the modern version :3
++            return null; // let's hope it's at least the modern version :3
 +        }
 +
 +        // you can't have errors in your code if you wrap the entire codebase in a try/catch block
@@ -109,11 +106,27 @@ index 0000000000000000000000000000000000000000..a7d1ae53eac94bc2dcf8bc78ef1da0d3
 +            }
 +
 +            // register the spark, newly downloaded or existing
-+            super.registerProviders(entrypointHandler, context);
++            return FILE_PROVIDER_SOURCE.prepareContext(context);
 +
 +        } catch (Throwable e) {
 +            LOGGER.error("Purpur: Failed to download and install spark plugin", e);
 +        }
++        return null;
++    }
++
++    @Override
++    public void registerProviders(final EntrypointHandler entrypointHandler, final Path context) {
++        if (context == null) {
++            return;
++        }
++
++        try {
++            FILE_PROVIDER_SOURCE.registerProviders(entrypointHandler, context);
++        } catch (IllegalArgumentException ignored) {
++            // Ignore illegal argument exceptions from jar checking
++        } catch (Exception e) {
++            LOGGER.error("Error loading our spark plugin: " + e.getMessage(), e);
++        }
 +    }
 +
 +    private static boolean hasSpark() {