small https://jbang.dev script to delete all repos under a user or org matching a regular expression. Used it to cleanup many years of weird empty repo experiments ;)

delrepo.java

//usr/bin/env jbang "$0" "$@" ; exit $?
//DEPS info.picocli:picocli:4.2.0
//DEPS org.kohsuke:github-api:1.101
import org.kohsuke.github.GitHub;
import org.kohsuke.github.GitHubBuilder;
import org.kohsuke.github.extras.OkHttpConnector;
import picocli.CommandLine;
import picocli.CommandLine.Command;
import picocli.CommandLine.Option;
import picocli.CommandLine.Parameters;

import java.io.IOException;
import java.util.concurrent.Callable;
import java.util.regex.Pattern;

@Command(name = "delrepo", mixinStandardHelpOptions = true, version = "delrepo 0.1",
        description = "delrepo made with jbang.%n%nBE CAREFUL: Once you use -f this script WILL DELETE ANY MATCHING REPOSITORY! No undo!")
class delrepo implements Callable<Integer> {

    @Option(names = { "--token"}, defaultValue = "${GITHUB_TOKEN}")
    private String token;

    @Option(names = { "--user", "--org"},required=true)
    private String user;

    @Option(names={"-f", "--force"}, description = "Actually delete repository matching the pattern")
    boolean force;

    @Parameters(index="0")
    private String repopattern;

    public static void main(String... args) {
        int exitCode = new CommandLine(new delrepo()).execute(args);
        System.exit(exitCode);
    }

    @Override
    public Integer call() throws Exception {

        if(force) {
            System.out.println("Finding repos to forcifully delete matching " + repopattern);
        } else {
            System.out.println("Finding repos matching " + repopattern);
            System.out.println("Use -f to actually forcefully delete.");
        }
        Pattern pattern = Pattern.compile(repopattern);

        GitHub github = GitHub.connectUsingOAuth(token);

        var ghRepo = github.getUser(user).listRepositories().iterator();

        ghRepo.forEachRemaining(repo -> {
                if (repo.getName().matches(repopattern)) {
                    System.out.println(repo.getHtmlUrl());
                    if(force) {
                        try {
                            repo.delete();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }
                }
        });

        return 0;
    }
}