1use std::path::PathBuf;
2use std::process::exit;
3
4use clap::{value_parser, Arg, ArgAction, Command};
5
6fn applet_commands() -> [Command; 2] {
7    [
8        Command::new("true").about("does nothing successfully"),
9        Command::new("false").about("does nothing unsuccessfully"),
10    ]
11}
12
13fn main() {
14    let cmd = Command::new(env!("CARGO_CRATE_NAME"))
15        .multicall(true)
16        .subcommand(
17            Command::new("busybox")
18                .arg_required_else_help(true)
19                .subcommand_value_name("APPLET")
20                .subcommand_help_heading("APPLETS")
21                .arg(
22                    Arg::new("install")
23                        .long("install")
24                        .help("Install hardlinks for all subcommands in path")
25                        .exclusive(true)
26                        .action(ArgAction::Set)
27                        .default_missing_value("/usr/local/bin")
28                        .value_parser(value_parser!(PathBuf)),
29                )
30                .subcommands(applet_commands()),
31        )
32        .subcommands(applet_commands());
33
34    let matches = cmd.get_matches();
35    let mut subcommand = matches.subcommand();
36    if let Some(("busybox", cmd)) = subcommand {
37        if cmd.contains_id("install") {
38            unimplemented!("Make hardlinks to the executable here");
39        }
40        subcommand = cmd.subcommand();
41    }
42    match subcommand {
43        Some(("false", _)) => exit(1),
44        Some(("true", _)) => exit(0),
45        _ => unreachable!("parser should ensure only valid subcommand names are used"),
46    }
47}
48