feat(complete): Add dynamic-support shell enum

This commit is contained in:
Ed Page 2023-07-18 21:19:54 -05:00
parent 278ae3ec63
commit 830dd740ef
3 changed files with 56 additions and 1 deletions

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//! Complete commands within shells //! Complete commands within shells
pub mod bash;
mod completer; mod completer;
pub mod bash;
pub mod shells;
pub use completer::*; pub use completer::*;

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//! Shell support
mod shell;
pub use shell::*;

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use std::fmt::Display;
use std::str::FromStr;
use clap::builder::PossibleValue;
use clap::ValueEnum;
/// Shell with auto-generated completion script available.
#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
#[non_exhaustive]
pub enum Shell {
/// Bourne Again SHell (bash)
Bash,
}
impl Display for Shell {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
self.to_possible_value()
.expect("no values are skipped")
.get_name()
.fmt(f)
}
}
impl FromStr for Shell {
type Err = String;
fn from_str(s: &str) -> Result<Self, Self::Err> {
for variant in Self::value_variants() {
if variant.to_possible_value().unwrap().matches(s, false) {
return Ok(*variant);
}
}
Err(format!("invalid variant: {s}"))
}
}
// Hand-rolled so it can work even when `derive` feature is disabled
impl ValueEnum for Shell {
fn value_variants<'a>() -> &'a [Self] {
&[Shell::Bash]
}
fn to_possible_value<'a>(&self) -> Option<PossibleValue> {
Some(match self {
Shell::Bash => PossibleValue::new("bash"),
})
}
}