1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90

use std::env;
use std::path::{Path, PathBuf};

pub struct Args {
    all: Vec<String>,
    target: Option<String>,
    manifest_path: Option<PathBuf>,
}

impl Args {
    pub fn new<A, S, T, P>(all: A, target: Option<T>, manifest_path: Option<P>) -> Self
    where
        A: IntoIterator<Item = S>,
        S: AsRef<str>,
        T: Into<String>,
        P: Into<PathBuf>,
    {
        Args {
            all: all.into_iter().map(|s| s.as_ref().to_string()).collect(),
            target: target.map(Into::into),
            manifest_path: manifest_path.map(Into::into)
        }
    }

    pub fn all(&self) -> &[String] {
        &self.all
    }

    pub fn target(&self) -> Option<&str> {
        self.target.as_ref().map(|s| &**s)
    }

    pub fn manifest_path(&self) -> Option<&Path> {
        self.manifest_path.as_ref().map(|s| &**s)
    }

    pub fn quiet(&self) -> bool {
        self.all.iter().any(|a| a == "--quiet" || a == "-q")
    }

    pub fn verbose(&self) -> bool {
        self.all
            .iter()
            .any(|a| a == "--verbose" || a == "-v" || a == "-vv")
    }
}

pub fn args(command_name: &str) -> Result<(Command, Args), String> {
    let mut args = env::args().skip(1);
    if args.next() != Some("x".to_string() + command_name) {
        Err(format!(
            "must be invoked as cargo subcommand: `cargo x{}`",
            command_name
        ))?;
    }
    let all = args.collect::<Vec<_>>();
    let command = match all.first().map(|s| s.as_str()) {
        Some("-h") | Some("--help") => Command::Help,
        Some("-v") | Some("--version") => Command::Version,
        _ => Command::Build,
    };

    let mut target: Option<String> = None;
    let mut manifest_path = None;
    {
        let mut args = all.iter();
        while let Some(arg) = args.next() {
            if arg == "--target" {
                target = args.next().map(|s| s.to_owned());
            } else if arg.starts_with("--target=") {
                target = arg.splitn(2, '=').nth(1).map(|s| s.to_owned());
            }
            if arg == "--manifest-path" {
                manifest_path = args.next().map(|s| s.to_owned());
            } else if arg.starts_with("--manifest-path=") {
                manifest_path = arg.splitn(2, '=').nth(1).map(|s| s.to_owned());
            }
        }
    }

    let args = Args::new(all, target, manifest_path);
    Ok((command, args))
}

#[derive(Clone, PartialEq)]
pub enum Command {
    Build,
    Help,
    Version,
}