zmkdir

#!/usr/bin/env -S java --source 25

import java.nio.file.Files;
import java.nio.file.Path;
import java.time.YearMonth;

enum Format {
    FLAT("."),
    NESTED("/");

    String separator;

    Format(String separator) {
        this.separator = separator;
    }

    String format(YearMonth yearMonth) {
        return "%d%s%02d".formatted(yearMonth.getYear(), this.separator, yearMonth.getMonthValue());
    }
}

void main(String... args) {
    var format = parseFormat(args);
    var yearMonth = YearMonth.now();
    var dirName = format.format(yearMonth);
    var path = Path.of(dirName);

    try {
        Files.createDirectories(path);
        System.out.println(path.toAbsolutePath());
    } catch (Exception e) {
        System.err.println("Failed to create directory: " + e.getMessage());
        System.exit(1);
    }
}

Format parseFormat(String[] args) {
    if (args.length == 0) {
        printUsage();
        System.exit(1);
    }
    return switch (args[0]) {
        case "-f", "--flat" -> Format.FLAT;
        case "-n", "--nested" -> Format.NESTED;
        default -> {
            printUsage();
            System.exit(1);
            yield Format.FLAT;
        }
    };
}

void printUsage() {
    System.err.println("""
        Usage: zmkdir <format>

        Formats:
          -f, --flat     Create YYYY.MM directory (e.g., 2026.01)
          -n, --nested   Create YYYY/MM directory (e.g., 2026/01)
        """);
}