clap/completions/
shell.rs

1#[allow(deprecated, unused_imports)]
2use std::ascii::AsciiExt;
3use std::fmt;
4use std::str::FromStr;
5
6/// Describes which shell to produce a completions file for
7#[derive(Debug, Copy, Clone)]
8pub enum Shell {
9    /// Generates a .bash completion file for the Bourne Again SHell (BASH)
10    Bash,
11    /// Generates a .fish completion file for the Friendly Interactive SHell (fish)
12    Fish,
13    /// Generates a completion file for the Z SHell (ZSH)
14    Zsh,
15    /// Generates a completion file for PowerShell
16    PowerShell,
17    /// Generates a completion file for Elvish
18    Elvish,
19}
20
21impl Shell {
22    /// A list of possible variants in `&'static str` form
23    pub fn variants() -> [&'static str; 5] {
24        ["zsh", "bash", "fish", "powershell", "elvish"]
25    }
26}
27
28impl FromStr for Shell {
29    type Err = String;
30
31    #[cfg_attr(feature = "cargo-clippy", allow(clippy::wildcard_in_or_patterns))]
32    fn from_str(s: &str) -> Result<Self, Self::Err> {
33        match s {
34            "ZSH" | _ if s.eq_ignore_ascii_case("zsh") => Ok(Shell::Zsh),
35            "FISH" | _ if s.eq_ignore_ascii_case("fish") => Ok(Shell::Fish),
36            "BASH" | _ if s.eq_ignore_ascii_case("bash") => Ok(Shell::Bash),
37            "POWERSHELL" | _ if s.eq_ignore_ascii_case("powershell") => Ok(Shell::PowerShell),
38            "ELVISH" | _ if s.eq_ignore_ascii_case("elvish") => Ok(Shell::Elvish),
39            _ => Err(String::from(
40                "[valid values: bash, fish, zsh, powershell, elvish]",
41            )),
42        }
43    }
44}
45
46impl fmt::Display for Shell {
47    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
48        match *self {
49            Shell::Bash => write!(f, "BASH"),
50            Shell::Fish => write!(f, "FISH"),
51            Shell::Zsh => write!(f, "ZSH"),
52            Shell::PowerShell => write!(f, "POWERSHELL"),
53            Shell::Elvish => write!(f, "ELVISH"),
54        }
55    }
56}