文盤Rust——起手式，CLI程序
來(lái)點(diǎn)感性認(rèn)識(shí)
clone 項(xiàng)目
git?clone?https://github.com/jiashiwen/interactcli-rs.git
cd?interactcli-rs命令行模式
cargo?run?requestsample?baidu
交互模式
cargo?run?--?-i
interact-rs>?requestsample?baidu
四步做個(gè)CLI
.
├──?examples
├──?log
├──?logs
└──?src
????├──?cmd
????├──?commons
????├──?configure
????├──?interact
????├──?logger
????└──?request
定義命令 cmd 模塊用于定義命令以及相關(guān)子命令,requestsample.rs 中定義了訪問(wèn)百度的命令
use?clap::Command;
??
pub?fn?new_requestsample_cmd()?->?Command<'static>?{
clap::Command::new("requestsample")
.about("requestsample")
.subcommand(get_baidu_cmd())
}
pub?fn?get_baidu_cmd()?->?Command<'static>?{
clap::Command::new("baidu").about("request?www.baidu.com")
}new_requestsample_cmd 函數(shù)定義了命令 "requestsample",get_baidu_cmd 函數(shù)定義了 requestsample 的子命令 baidu
注冊(cè)命令 src/cmd/rootcmd.rs 文件中定義了命令樹，可以在此注冊(cè)定義好的子命令
lazy_static!?{
????static?ref?CLIAPP:?clap::Command<'static>?=?clap::Command::new("interact-rs")
????????.version("1.0")
????????.author("Your?Name.?
????????.about("command?line?sample")
????????.arg_required_else_help(true)
????????.arg(
????????????Arg::new("config")
????????????????.short('c')
????????????????.long("config")
????????????????.value_name("FILE")
????????????????.help("Sets?a?custom?config?file")
????????????????.takes_value(true)
????????)
????????.arg(
????????????Arg::new("daemon")
????????????????.short('d')
????????????????.long("daemon")
????????????????.help("run?as?daemon")
????????)
????????.arg(
????????????Arg::new("interact")
????????????????.short('i')
????????????????.long("interact")
????????????????.conflicts_with("daemon")
????????????????.help("run?as?interact?mod")
????????)
????????.arg(
????????????Arg::new("v")
????????????????.short('v')
????????????????.multiple_occurrences(true)
????????????????.takes_value(true)
????????????????.help("Sets?the?level?of?verbosity")
????????)
????????.subcommand(new_requestsample_cmd())
????????.subcommand(new_config_cmd())
????????.subcommand(new_multi_cmd())
????????.subcommand(new_task_cmd())
????????.subcommand(new_loop_cmd())
????????.subcommand(
????????????clap::Command::new("test")
????????????????.about("controls?testing?features")
????????????????.version("1.3")
????????????????.author("Someone?E.?
????????????????.arg(
????????????????????Arg::new("debug")
????????????????????????.short('d')
????????????????????????.help("print?debug?information?verbosely")
????????????????)
????????);
????static?ref?SUBCMDS:?Vec?=?subcommands();
}
pub?fn?run_app()?{
????let?matches?=?CLIAPP.clone().get_matches();
????if?let?Some(c)?=?matches.value_of("config")?{
????????println!("config?path?is:{}",?c);
????????set_config_file_path(c.to_string());
????}
????set_config(&get_config_file_path());
????cmd_match(&matches);
}
pub?fn?run_from(args:?Vec<String>)?{
????match?clap_Command::try_get_matches_from(CLIAPP.to_owned(),?args.clone())?{
????????Ok(matches)?=>?{
????????????cmd_match(&matches);
????????}
????????Err(err)?=>?{
????????????err.print().expect("Error?writing?Error");
????????}
????};
}定義好的命令不需其他處理，框架會(huì)在系統(tǒng)運(yùn)行時(shí)生成子命令樹，用于在領(lǐng)域交互模式下命令提示的支持
命令解析 src/cmd/rootcmd.rs 中的 cmd_match 負(fù)責(zé)解析命令，可以把解析邏輯寫在該函數(shù)中
fn?cmd_match(matches:?&ArgMatches)?{???
??if?let?Some(ref?matches)?=?matches.subcommand_matches("requestsample")?{
??????if?let?Some(_)?=?matches.subcommand_matches("baidu")?{
??????????let?rt?=?tokio::runtime::Runtime::new().unwrap();
??????????let?async_req?=?async?{
??????????????let?result?=?req::get_baidu().await;
??????????????println!("{:?}",?result);
??????????};
??????????rt.block_on(async_req);
??????};
??}
}修改交互模式的命令提示 提示符可以在src/interact/cli.rs 中定義
pub?fn?run()?{
??
??...
??loop?{
??????let?p?=?format!("{}>?",?"interact-rs");
??????rl.helper_mut().expect("No?helper").colored_prompt?=?format!("\x1b[1;32m{}\x1b[0m",?p);
??????...
??}
??
??...
}
下次為大家介紹一下interactcli-rs各種功能是如何實(shí)現(xiàn)的。
??更多了解??
