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#![allow(dead_code)]
use clap::error::{Error, ErrorKind};
use clap::{ArgMatches, Args as _, Command, FromArgMatches, Parser, Subcommand};
#[derive(Parser, Debug)]
struct AddArgs {
name: Vec<String>,
}
#[derive(Parser, Debug)]
struct RemoveArgs {
#[arg(short, long)]
force: bool,
name: Vec<String>,
}
#[derive(Debug)]
enum CliSub {
Add(AddArgs),
Remove(RemoveArgs),
}
impl FromArgMatches for CliSub {
fn from_arg_matches(matches: &ArgMatches) -> Result<Self, Error> {
match matches.subcommand() {
Some(("add", args)) => Ok(Self::Add(AddArgs::from_arg_matches(args)?)),
Some(("remove", args)) => Ok(Self::Remove(RemoveArgs::from_arg_matches(args)?)),
Some((_, _)) => Err(Error::raw(
ErrorKind::InvalidSubcommand,
"Valid subcommands are `add` and `remove`",
)),
None => Err(Error::raw(
ErrorKind::MissingSubcommand,
"Valid subcommands are `add` and `remove`",
)),
}
}
fn update_from_arg_matches(&mut self, matches: &ArgMatches) -> Result<(), Error> {
match matches.subcommand() {
Some(("add", args)) => *self = Self::Add(AddArgs::from_arg_matches(args)?),
Some(("remove", args)) => *self = Self::Remove(RemoveArgs::from_arg_matches(args)?),
Some((_, _)) => {
return Err(Error::raw(
ErrorKind::InvalidSubcommand,
"Valid subcommands are `add` and `remove`",
))
}
None => (),
};
Ok(())
}
}
impl Subcommand for CliSub {
fn augment_subcommands(cmd: Command) -> Command {
cmd.subcommand(AddArgs::augment_args(Command::new("add")))
.subcommand(RemoveArgs::augment_args(Command::new("remove")))
.subcommand_required(true)
}
fn augment_subcommands_for_update(cmd: Command) -> Command {
cmd.subcommand(AddArgs::augment_args(Command::new("add")))
.subcommand(RemoveArgs::augment_args(Command::new("remove")))
.subcommand_required(true)
}
fn has_subcommand(name: &str) -> bool {
matches!(name, "add" | "remove")
}
}
#[derive(Parser, Debug)]
struct Cli {
#[arg(short, long)]
top_level: bool,
#[command(subcommand)]
subcommand: CliSub,
}
fn main() {
let args = Cli::parse();
println!("{args:#?}");
}