updt 4.2.0

Cross-platform update helper for npm, cargo, rustup, scoop, Homebrew, paru, flatpak, pacman, DNF, and pkg.
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use clap_complete::{Shell, generate};

use crate::cli::build_cli;

pub fn completion_script(shell: Shell) -> Vec<u8> {
    let mut command = build_cli();
    let mut script = Vec::new();
    generate(shell, &mut command, "updt", &mut script);
    if shell == Shell::Fish {
        // The static fish generator omits positional values. Keep candidates
        // sourced from clap, including targets and completion shell names.
        for subcommand in command.get_subcommands() {
            let values = subcommand
                .get_positionals()
                .filter_map(|arg| arg.get_value_parser().possible_values())
                .flatten()
                .filter(|value| !value.is_hide_set())
                .map(|value| value.get_name().to_owned())
                .collect::<Vec<_>>();
            if !values.is_empty() {
                let line = format!(
                    "complete -c updt -n '__fish_updt_using_subcommand {}' -f -a '{}'\n",
                    subcommand.get_name(),
                    values.join(" "),
                );
                script.extend_from_slice(line.as_bytes());
            }
        }
    }
    script
}