Add task to delete finished icons from the extracted folder

.idea/runConfigurations/Delete_Finished_Icons.xml

@@ -0,0 +1,24 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="Delete Finished Icons" type="GradleRunConfiguration" factoryName="Gradle">
+    <ExternalSystemSettings>
+      <option name="executionName" />
+      <option name="externalProjectPath" value="$PROJECT_DIR$" />
+      <option name="externalSystemIdString" value="GRADLE" />
+      <option name="scriptParameters" value="" />
+      <option name="taskDescriptions">
+        <list />
+      </option>
+      <option name="taskNames">
+        <list>
+          <option value="deleteFinishedIcons" />
+        </list>
+      </option>
+      <option name="vmOptions" />
+    </ExternalSystemSettings>
+    <ExternalSystemDebugServerProcess>true</ExternalSystemDebugServerProcess>
+    <ExternalSystemReattachDebugProcess>true</ExternalSystemReattachDebugProcess>
+    <DebugAllEnabled>false</DebugAllEnabled>
+    <RunAsTest>false</RunAsTest>
+    <method v="2" />
+  </configuration>
+</component>

build.gradle.kts

@@ -81,6 +81,7 @@ fun getClassPathFolders(configuration: Configuration): List<String> {
 }
 
 createHelperTask("fixSVGs",                    main = "FixSVGs")
+createHelperTask("deleteFinishedIcons",        main = "DeleteFinishedIcons")
 createHelperTask("grabIconsFromInstalledIDEs", main = "GrabIcons\$FromInstalledIDEs")
 createHelperTask("grabIconsFromGradle",        main = "GrabIcons\$FromArgumentPaths") { task ->
 	val ideLibraries = getClassPathFolders(project.configurations.getByName("ides"))

helpers/com/chylex/intellij/coloredicons/DeleteFinishedIcons.java

@@ -0,0 +1,50 @@
+package com.chylex.intellij.coloredicons;
+
+import org.apache.commons.io.FileUtils;
+import java.io.File;
+import java.nio.file.Path;
+import java.util.Collection;
+import java.util.Set;
+import static java.util.stream.Collectors.toSet;
+
+public final class DeleteFinishedIcons {
+	@SuppressWarnings("ResultOfMethodCallIgnored")
+	public static void main(final String[] args) {
+		final Path extractedRootPath = Path.of("./extracted");
+		final Path finishedRootPath = Path.of("./resources/icons");
+		
+		final Collection<File> extractedFiles = FileUtils.listFiles(extractedRootPath.toFile(), null, true);
+		final Collection<File> finishedFiles = FileUtils.listFiles(finishedRootPath.toFile(), null, true);
+		
+		System.out.println("Extracted files: " + extractedFiles.size());
+		System.out.println("Finished files: " + finishedFiles.size());
+		
+		final Set<String> finishedRelativePaths = finishedFiles.stream()
+			.map(file -> relativize(finishedRootPath, file))
+			.collect(toSet());
+		
+		int deleted = 0;
+		
+		for (final File extractedFile : extractedFiles) {
+			if (finishedRelativePaths.remove(relativize(extractedRootPath, extractedFile))) {
+				++deleted;
+				extractedFile.delete();
+			}
+		}
+		
+		System.out.println("Deleted files: " + deleted);
+		
+		if (!finishedRelativePaths.isEmpty()) {
+			System.out.println("Undeleted files: " + finishedRelativePaths.size());
+			System.out.println();
+			
+			finishedRelativePaths.stream()
+				.sorted()
+				.forEachOrdered(undeletedPath -> System.out.println("Undeleted file: " + undeletedPath));
+		}
+	}
+	
+	private static String relativize(final Path basePath, final File file) {
+		return basePath.relativize(file.toPath()).toString();
+	}
+}