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A gradle plugin that generates Material Design 3 themes for Android projects.

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package dev.rikka.tools.materialthemebuilder;

import java.io.File;
import java.io.IOException;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;

public class Util {

    public static String capitalize(String val) {
        char[] arr = val.toCharArray();
        arr[0] = Character.toUpperCase(arr[0]);
        return new String(arr);
    }

    public static void createFile(File file) throws IOException {
        if (!file.exists()) {
            if (!file.getParentFile().exists()) {
                if (!file.getParentFile().mkdirs()) {
                    throw new IOException("Failed to create " + file.getParentFile());
                }
            }
            if (!file.createNewFile()) {
                throw new IOException("Failed to create " + file);
            }
        }
    }

    public static void clearDir(File dir) {
        try {
            Files.walkFileTree(dir.toPath(), new SimpleFileVisitor<>() {
                @Override
                public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException {
                    Files.delete(dir);
                    return FileVisitResult.CONTINUE;
                }

                @Override
                public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                    Files.delete(file);
                    return FileVisitResult.CONTINUE;
                }
            });
        } catch (Throwable ignored) {
        }
    }
}