Fix gradle emitDependencies task cache

Partially revert what I deleted in 2636070

Author: Yeregorix

build-logic/src/main/java/org/spongepowered/gradle/impl/OutputDependenciesToJson.java

@@ -40,6 +40,7 @@
 import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.Internal;
 import org.gradle.api.tasks.Nested;
+import org.gradle.api.tasks.Optional;
 import org.gradle.api.tasks.OutputFile;
 import org.gradle.api.tasks.TaskAction;
 
@@ -49,6 +50,7 @@
 import java.nio.file.Files;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
+import java.util.Collections;
 import java.util.Comparator;
 import java.util.HashSet;
 import java.util.List;
@@ -108,6 +110,10 @@ public final void dependencies(final String key, final NamedDomainObjectProvider
     @Internal
     public abstract SetProperty<ResolvedArtifactResult> getExcludedDependencies();
 
+    @Input
+    @Optional
+    protected abstract SetProperty<ModuleComponentIdentifier> getExcludedDependencyIdentifiers();
+
     public final void excludeDependencies(final NamedDomainObjectProvider<Configuration> config) {
         this.getExcludedDependencies().addAll(config.flatMap(conf -> conf.getIncoming().getArtifacts().getResolvedArtifacts()));
     }
@@ -123,18 +129,21 @@ public final void excludeDependencies(final NamedDomainObjectProvider<Configurat
 
     public OutputDependenciesToJson() {
         this.getAllowedClassifiers().add("");
+        this.getExcludedDependencyIdentifiers().set(this.getExcludedDependencies().map(artifacts -> {
+            final Set<ModuleComponentIdentifier> ids = new HashSet<>();
+            for (final ResolvedArtifactResult artifact : artifacts) {
+                final ComponentIdentifier id = artifact.getId().getComponentIdentifier();
+                if (id instanceof ModuleComponentIdentifier) {
+                    ids.add((ModuleComponentIdentifier) id);
+                }
+            }
+            return ids;
+        }));
     }
 
     @TaskAction
     public void generateDependenciesJson() {
-        final Set<ModuleComponentIdentifier> excludedDeps = new HashSet<>();
-        if (this.getExcludedDependencies().isPresent()) {
-            for (final ResolvedArtifactResult result : this.getExcludedDependencies().get()) {
-                if (result.getId().getComponentIdentifier() instanceof ModuleComponentIdentifier) {
-                    excludedDeps.add((ModuleComponentIdentifier) result.getId().getComponentIdentifier());
-                }
-            }
-        }
+        final Set<ModuleComponentIdentifier> excludedDeps = this.getExcludedDependencyIdentifiers().getOrElse(Collections.emptySet());
 
         final Map<String, ConfigurationHolder> inputConfigs = this.getDependencies().get();
         final Map<String, List<DependencyDescriptor>> dependenciesMap = new TreeMap<>();
@@ -201,15 +210,29 @@ public static String toHexString(final byte[] bytes) {
     }
 
     public static class ConfigurationHolder {
-        private final Provider<Set<ResolvedArtifactResult>> configuration;
+        private final Provider<Set<ResolvedArtifactResult>> artifacts;
 
         public ConfigurationHolder(final Configuration configuration) {
-            this.configuration = configuration.getIncoming().getArtifacts().getResolvedArtifacts();
+            this.artifacts = configuration.getIncoming().getArtifacts().getResolvedArtifacts();
+        }
+
+        @Input
+        public Provider<Set<String>> getIds() {
+            return this.artifacts.map(set -> {
+                final Set<String> ids = new HashSet<>();
+                for (final ResolvedArtifactResult artifact : set) {
+                    final ComponentIdentifier id = artifact.getId().getComponentIdentifier();
+                    if (id instanceof ModuleComponentIdentifier) {
+                        ids.add(id.getDisplayName());
+                    }
+                }
+                return ids;
+            });
         }
 
         @Internal
         public Provider<Set<ResolvedArtifactResult>> getArtifacts() {
-            return this.configuration;
+            return this.artifacts;
         }
     }
 }