]

    static void main(String[] args) {
        if (args.length != 1) {
            System.err.println("Usage: groovy CheckBadMerge.groovy <commits_file>")
            System.exit(1)
        }

        List<String> commits = Files.readAllLines(Paths.get(args[0]))
        try {
            commits.each { checkCommit(it) }
        } finally {