我想安排子命令,例如:
mycmd status
:打印一个简短的状态 - 不工作mycmd status full
: 打印详细状态 - OKmycmd status dump
: 将完整的调试状态转储到文件 - 好的
我无法实现简单mycmd status
,因为 StructOpt 认为我缺少必需的子命令(子子命令?)并打印使用情况。文档表明我需要以Option<>
某种方式使用该特征,但我无法弄清楚在这种情况下如何使用。
我有一些非常类似于以下内容:
main.rs
use structopt::StructOpt;
// ... other use cmds ...
#[derive(Debug, StructOpt)]
#[structopt(
name = "mycmd",
about = "A utility to do stuff."
)]
#[structopt(setting = structopt::clap::AppSettings::ColoredHelp)]
#[structopt(setting = structopt::clap::AppSettings::SubcommandRequired)]
struct Opts {
#[structopt(short = "v", parse(from_occurrences))]
/// Increase message verbosity
verbosity: usize,
#[structopt(subcommand)]
cmd: Tool,
}
#[derive(Debug, StructOpt)]
enum Tool {
#[structopt(name = "dofoo")]
DoFoo(dofoo::Command),
#[structopt(name = "status")]
Status(status::Command),
}
状态.rs
use structopt::StructOpt;
#[derive(Debug, StructOpt)]
#[structopt(name = "status", about = "Get the status of stuff.")]
#[structopt(setting = structopt::clap::AppSettings::ColoredHelp)]
#[structopt(max_term_width = 80)]
pub enum Command {
#[structopt(name = "full")]
/// Print full (i.e. verbose) status
Full {},
#[structopt(name = "dump")]
/// Creates a zipped dump of the full system status to a file
Dump {
#[structopt(short = "o", long = "out", value_name = "FILE", parse(from_os_str))]
/// Filename of the output file.
out_fname: PathBuf,
},
}
impl Command {
pub fn execute(self) -> Result<()> {
match self {
Command::Full {} => cmd_do_verbose_print(),
Command::Dump { out_fname } => cmd_do_file_dump(out_fname),
// TODO: Bad. This is dead code.
_ => cmd_do_print(),
}
}
}