List all missing hard depends not just first (#5673)

Spigot-API-Patches/0305-List-all-missing-hard-depends-not-just-first.patch

@@ -0,0 +1,31 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Jake Potrebic <jake.m.potrebic@gmail.com>
+Date: Tue, 18 May 2021 10:38:10 -0700
+Subject: [PATCH] List all missing hard depends not just first
+
+
+diff --git a/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java b/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
+index d3812d8cd195017841ee08ffbc53a5748fcc74ec..c2070d2df2349f6215250f0d24319befafbcf472 100644
+--- a/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
++++ b/src/main/java/org/bukkit/plugin/java/JavaPluginLoader.java
+@@ -132,13 +132,19 @@ public final class JavaPluginLoader implements PluginLoader {
+             ));
+         }
+ 
++        Set<String> missingHardDependencies = new HashSet<>(description.getDepend().size()); // Paper - list all missing hard depends
+         for (final String pluginName : description.getDepend()) {
+             Plugin current = server.getPluginManager().getPlugin(pluginName);
+ 
+             if (current == null) {
+-                throw new UnknownDependencyException("Unknown dependency " + pluginName + ". Please download and install " + pluginName + " to run this plugin.");
++                missingHardDependencies.add(pluginName); // Paper - list all missing hard depends
+             }
+         }
++        // Paper start - list all missing hard depends
++        if (!missingHardDependencies.isEmpty()) {
++            throw new UnknownDependencyException("Unknown dependencies: " + String.join(", ", missingHardDependencies) + " Please download and install these plugins to run this plugin.");
++        }
++        // Paper end
+ 
+         server.getUnsafe().checkSupported(description);
+