You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: main.rs
    path of file: ./repos/cnosdb/tskv/src
    
    the code of the file until where you have to start completion: use std::env;

const ARG_PRINT: &str = "print"; // To print something
const ARG_REPAIR: &str = "repair"; // To repair something
const ARG_TSM: &str = "--tsm"; // To print a .tsm file
const ARG_TOMBSTONE: &str = "--tombstone"; // To print a .tsm file with tombsotne
const ARG_SUMMARY: &str = "--summary"; // To print a summary file
const ARG_WAL: &str = "--wal"; // To print a wal file
const ARG_INDEX: &str = "--index"; // To print a wal file

/// # Example
/// tskv print [--tsm <tsm_path>] [--tombstone]
/// tskv print [--summary <summary_path>]
/// tskv print [--wal <wal_path>]
/// tskv repair [--index <file_name>]
/// - --tsm <tsm_path> print statistics for .tsm file at <tsm_path> .
/// - --tombstone also print tombstone for every field_id in .tsm file.
#[tokio::main]
async fn main() {
    let mut args = env::args().peekable();

    let mut show_tsm = false;
    let mut tsm_path: Option<String> = None;
    let mut show_tombstone = false;

    let mut show_summary = false;
    let mut summary_path: Option<String> = None;

    let mut show_wal = false;
    let mut wal_path: Option<String> = None;

    let mut repair_index = false;
    let mut index_file: Option<String> = None;

    while let Some(arg) = args.peek() {
        // --print [--tsm <path>]
        if arg.as_str() == ARG_PRINT {
            while let Some(print_arg) = args.next() {
                match print_arg.as_str() {
                    ARG_TSM => {
                        show_tsm = true;
                        tsm_path = args.next();
                        if tsm_path.is_none() {
                            println!("Invalid arguments: --tsm <tsm_path>");
                        }
                    }
                    ARG_TOMBSTONE => {
                        show_tombstone = true;
                    }
                    ARG_SUMMARY => {
                        show_summary = true;
                        summary_path = args.next();
                        if summary_path.is_none() {
                            println!("Invalid arguments: --summary <summary_path>")
                        }
                    }
                    ARG_WAL => {
                        show_wal = true;
                        wal_path = args.next();
                        if wal_path.is_none() {
                            println!("Invalid arguments: --wal <wal_path>")
                        }
                    }
                    _ => {}
                }
            }
        } else if arg.as_str() == ARG_REPAIR {
            while let Some(repair_arg) = args.next() {
                if repair_arg.as_str() == ARG_INDEX {
                    repair_index = true;
                    index_file = arg
    
async fn main() {
    let mut args = env::args().peekable();

    let mut show_tsm = false;
    let mut tsm_path: Option<String> = None;
    let mut show_tombstone = false;

    let mut show_summary = false;
    let mut summary_path: Option<String> = None;

    let mut show_wal = false;
    let mut wal_path: Option<String> = None;

    let mut repair_index = false;
    let mut index_file: Option<String> = None;

    while let Some(arg) = args.peek() {
        // --print [--tsm <path>]
        if arg.as_str() == ARG_PRINT {
            while let Some(print_arg) = args.next() {
                match print_arg.as_str() {
                    ARG_TSM => {
                        show_tsm = true;
                        tsm_path = args.next();
                        if tsm_path.is_none() {
                            println!("Invalid arguments: --tsm <tsm_path>");
                        }
                    }
                    ARG_TOMBSTONE => {
                        show_tombstone = true;
                    }
                    ARG_SUMMARY => {
                        show_summary = true;
                        summary_path = args.next();
                        if summary_path.is_none() {
                            println!("Invalid arguments: --summary <summary_path>")
                        }
                    }
                    ARG_WAL => {
                        show_wal = true;
                        wal_path = args.next();
                        if wal_path.is_none() {
                            println!("Invalid arguments: --wal <wal_path>")
                        }
                    }
                    _ => {}
                }
            }
        } else if arg.as_str() == ARG_REPAIR {
            while let Some(repair_arg) = args.next() {
                if repair_arg.as_str() == ARG_INDEX {
                    repair_index = true;
                    index_file = args.next();
                    if index_file.is_none() {
                        println!("Invalid arguments: --index <index file>");
                    }
                }
            }
        }
        args.next();
    }

    if show_tsm {
        if let Some(p) = tsm_path {
            println!("TSM Path: {}, ShowTombstone: {}", p, show_tombstone);
            // tskv::print_tsm_statistics(p, show_tombstone).await;
        }
    }

    if show_summary {
        if let Some(p) = summary_path {
            println!("Summary Path: {}", p);
            tskv::print_summary_statistics(p).await;
        }
    }

    if show_wal {
        if let Some(p) = wal_path {
            println!("Wal Path: {}", p);
            tskv::print_wal_statistics(p).await;
        }
    }

    if repair_index {
        if let Some(name) = index_file {
            println!("repair index: {}", name);
            let result = tskv::index::binlog::repair_index_file(&name).await;
            println!("repair index result: {:?}", result);
        }
    }
}